85 ft end fed antenna


 

85 ft end fed antenna 5 m between balun and 20m trap, 5. Any objects, metal in particular, within the near-field radiation pattern can affect the impedance and radiation pattern of the antenna. If we restore the original 1/4 wavelength spacing and feed the antennas in phase quadrature (that is, one antenna is fed with 1/4 wave coaxial feed and other with 1/2 wave resulting in a 90 deg. 0 277. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. Any antenna to be used with the FT-991 must be fed from the transceiver with 50 Ohm coaxial cable. Results: •The 18 1⁄2 foot end fed works better on 15, 12, and 10 meters. The 200 watt Unun also operates “stand alone”, thus does not require an LDG Tuner for resonant verticals. Least you now have steam coming out of your ears, let me explain why. ABS pipe has cellular core, requires no special tools for HF Wire Antennas for Ham Radio. Both the textile antenna and its copper counterpart were measured in free space. DBJ-2 (commercial) dual band roll up antenna kit - (152-157 MHz and 460-470 MHz). Theoretically it is a multi-band antenna but there are several trade-offs. It is for non-pressure systems where temperatures will not exceed 140 deg F. Following the directions exactly as specified (0. Whether you`re QRPbackpack, vacationing, emcomm station, or an antenna neighbors will never see, MFJs got an EFHW for you: MFJ-1982LP, $49. Bi-directional - These antennas are able to capture signals from two directions. 2kW PEP : 63' 5. 020″) has the same jacket as #531 (nominal OD, 0. The ground end of the balun and feed coax was connected to the ground stake. Typical VSWR for 10 through 80 is 1. 5 KICK YOUr CABLE COMPANY TO THE CURB. Progress BW 3. Fold, Bend, and Mutilate Making a Dipole Fit the Space Available L. This antenna normally has about a 3 DB gain over a 1/2 wave center fed dipole. A 1:7 ratio implies an assumed end impedance around 2500 ohms vs a 1:8 ratio suggesting 3200 ohm impedance. 2 ft (10. 5 Trapped Center Fed Each 10 m antenna at 35 ft. so its back to the drawing board again. Traditionally this antenna is fed with a 600 ohm feed. The basic formula for determining the length of a center fed, half-wave wire Dipole or Inverted Vee antenna is:. So, using the example shown in Fig 3 of a ten metre wire, the lead-in would be 3. Off-Center-Fed Full-Wave Doublet Antenna. Monitor Doublet EARCHI antenna Elecraft KX2 End fed antenna FLDIGI FT8 Heathkit SB-200 Hustler 4BTV IC-7100 ICOM 718 K9AY antenna LDG YT-100 LNR EF-Quad Lymphoma Mirrorless Mobile HF NPOTA Oak Hills Research OHR WM-2 Omni Omni antenna Par Electronics Porta-Paddle Portable operation QRP RigExpert Rockmite RSP1A SDRPlay Signalink Tarheel Antenna 50-Ohm value. The antenna is sported by a 22ft (6. 91 - Inductance-Loaded Shortened Dipole for 160m. 225 22ft 1in 6. I can tell you that it is marginal on 10 and 40 cuz it was the first antenna I had when I got my ticket. 175 33ft 0. 0 – 90MHz. I glued a 40-to-32 mm PVC adapter piece to the bottom end of the coil core. Mike is operating from the park with a Yaesu FT-891 running 90 watts into the antenna. Mike, K8MRD, did a great video showing the PackTenna End-Fed Half Wave antenna in action. In case of the end-fed antenna, put * to jX. Whether you`re QRPbackpack, vacationing, emcomm station, or an antenna neighbors will never see, MFJs got an EFHW for you: MFJ-1982LP, $59. So, it’s a cousin to the G5RV (which only resonates on 14 & 24 MHz), but better as it needs no ATU on 40, 20, 17, 12, 10 and 6 metres. 0 0 1 212 1171 Com One LTD 9 2 1381 14. I am very anxious to see what results I get compared to my attic mounted 37 ft. This is easily checked by installing a dummy load on one end, and using the antenna analyzer on the other. My normal FD antenna farm consists of a dipole at about 30’ (still consider fairly low with a high take off angle) and a vertical with raised radials. Make a rotating VHF/UHF HAM SAT antenna array; 80 metre end-fed antenna; 40m Hamstick Dipole vs 1/4 wave vertical antenna; Spectrum Communication trapped dipole 20 & 40 metres; Artificial grounding with the MFG-931; Band plans (other site) How to add an SDR pan-adapter to your transceiver; Digital repeater maps UK; Yaesu FT-817 battery pack If you are limited on space to hang an antenna, but still want to use all of the HF bands, then the"QSO-KING" is a good choice for you. The Answer? If cost is your primary consideration, the horizontal dipole is a great choice. Designed as a 20m antenna. 7 ft (20. Antenna wire can't stretch or snap. MFJ ½ Wave Dipole Antennas are center fed and adjustable for the desired operating frequency. 50 ft of RG-8X was run to the rig. 300 Ohm Twin Lead with the ends shorted is an option for even greater bandwidth. This antenna delivers not only performance, but superb value. ----- ----- Spacing Length Impedance Length Impedance ----- ----- ----- ----- ----- 4 87. A short wire is all that is needed: about 0. Manual 1:49 UnUn for End Fed antenna’s 100 Watt; Manual 1:49 UnUn for End Fed antenna’s 250 Watt; Manual 1:49 UnUn for Mini End Fed antenna; Technique. 5, all together this is a relatively simple solution, you don’t need a structure on the roof, and the components are relatively cheap. On 40 and 80M is where this antenna really shines. The antenna comprised 40ft of insulated wire taped to a fibreglass fishing pole mounted vertically at ground level on the corner of my garage. 06m 18. It is an amazing antenna in terms of performance, and takes me literally 10 minutes at most to set the whole thing up. We start out by listening on the receive loop. Maple Leaf Studio is a labor of love. Both antennas were run through a manual A/B antenna switch. If fed at the end (a. The PEF 160-10 contains a FT-240/61 trifilar wound, 9:1 UNUN wound with silver tinned PTFE insulated wire. , 84 / 5 ≈ 17 ft). The Maple Leaf "QSO-KING" is an end fed, multiband, wire antenna that will cover all bands from 160 to 6 meters, including the WARC Bands, as well as 60 meters and MARS frequencies. We have taken a look at the basic resonant half-wavelength center-fed dipole antenna constructed at low heights (relative to a wavelength). Power handling? This antenna can be fed with 50 ohm coaxial cable, via a 1:1 balun. FROM 20 OHMS TO 1500 OHMS. Being aprox. The current generation of HF portable radios offer great performance on the HF bands—but to get the best out of them, an efficient antenna is required. Multi-band with antenna tuner. The antenna has a full 300kHz bandwidth on 80m between 3:1 SWR points. Can be fed from the opposite end with virtually the same patterns and gain. Used Below the antenna used during the PACC 2013. This type of antenna is similar to the common half-wavelength dipole, but with one significant advantage. More indoor antennas here. The basement contained a dormitory and emergency rations store, the ground floor housed the twelve transmitters, and the top floor held the receivers for the Type 85, the associated IFF gear, and the local half of the I’ve tried most options and after 3 summers of various antennas, finally found my solution with a commercial end-fed 40-10 antenna from MyAntennas. "EFHW" - the end-fed half wave antenna. Complete with 2 end insulators and 1 centre insulator; Resonates on 10m, 20m, 40m & 80m; Works on 30m, 17m, 15m, 12m, & 6m with antenna tuner; G5RV-300AC - true G5RV antenna - $109. I’ve been reading a lot about end fed half-waves and now recognize the commercial antenna and transformer that I bought to be an EARCHI design, which I’ve never had much luck with. One end of the antenna is about 35 feet high, the center about 25 feet, and the other end, maybe 20 feet high. An antenna for 0 MHz will be approximately: DIPOLE = 0 Foot inf Inches in overall length and 0 Foot 0. Set the target to the matching circuit and star the optimization. Whereas, if most come from a distance further than 50 miles, you will get some channels with an indoor antenna. Mostly 59's so far. However, with 2m88+2m94 per side (2x5m76 total), the antenna ended up a little shorter than intended. I still have not transmitted due to the present conditions and and only 100 watts. End Fed Half Wave antennas have only one long side wire so the antenna feed point can be closest to the location of the shortwave radio, unlike the dipole antenna that is twice as long and must be fed at the center of the antenna. 50/10. So far I’m really happy with this antenna. 2 m) downlead. But performance is down about 8-12db on a dipole on 80m. The best feature is the lack of noise from domestic devices because the antenna is located far from the house. The antenna, including the 300 Ω feedline, should also be mounted as far from other structures as possible. The Delta Loop is not only a great transmitting antenna but a low noise receiving antenna. The Zepp, short for Zeppelin is any resonant antenna end-fed by ladder line. x 2 ft. I figure one can't have too many antennas and this one would be a quick build. com As I learn Google Sketch my plan is to build a carrier or bracket of sorts for the T1 tuner and get it 3D printed. The antenna can be fed at one cor-ner (low impedance, current fed) or at the lower end of one of the vertical wires (high impedance, voltage fed). Steve Nichols G0KYA Contents 1. 5m) end-fed is insulated for safety. In one case I made signal strength comparisons with a known station about 90 miles away. 05 λ ≈ 2. 8m) insulation Radials Graphics by G8ODE 22 Jan 2009 iss 1. The radiator is 45 feet of genuine #14 black polyethylene coated Flex-Weave wire. Fed by ¼ λladder line into a balanced tuner. 135-ft. For small lots: with the antenna legs sloping down at the minimum 120 degree angle the 4-Band antennas need at least 60 feet of ground space from end-to-end, 7-Band antennas need at least 120 feet of ground space, and 8-Band antennas need 239 feet of ground space. The vertical section should be as high as possible, with the remainder of the antenna run horizontally to a support, such as a tree or a mast. 30 Watts QRP, 40-10 Meters, 66 feet. 92 - V-Beam END FED ANTENNA Balun 1:50 Homemade SV1GGF εκπομπής ή λήψης end fed η οποία 240-31 σε σχέση με τον FT 240-43 που FT-897/857 Series of transceivers, when used with an end-fed random wire or long whip antenna. They are sup-ported by PVC pipe with T connectors at the top fashioned around his fenceline. Cul = transformer wire. Sure would be a great ARRL SS antennas. My current version of the W3EDP has the 85' end-fed wire wound onto an inexpensive plastic camping-style clothesline reel . Such an antenna requires a special coupling network to properly couple my 50 ohm coax to the antenna's high impedance (~2500 ohms). Since we tend to feed the dipole with coaxial cable, we are concerned with the antenna length and resonance. The RU-4:1 Unun was designed to allow easy interface of vertical and end fed antennas to the LDG line of Automatic Antenna Tuners. The ratio is probably not particularly critical. – If the far end is shorted, there is a very high impedance looking into the stub – If the far end is open, there is a short looking into the stub. in length and 3 ft. It can be a condo dweller’s only access to the world of ham radio or the best alternative for a backpacking SOTA (Summits on the Air) mountaintop expedition. 40m - 80m - 160m Short Dipole Antenna. Works fine on 20M. 8 MHz 3. 5 m (approximately 8 ft) long. The overall length of that antenna is 44 feet. Made different? Which is better for 1-30 Mhz coverage? Thanks We sometimes cannot freely choose our ground or counterpoise systems. On-Ground Radial Guidelines Right now I'm using an end-fed 135' long wire, that runs from 20' to about 85' high (from house to a tree), matched on the end with an auto-tuner (an ah4 mounted on the corner of the house at 20' off the ground), with two 70' counterpoise wires running away from the tuner, and a 60' run of RG8 from the tuner to the shack. End-fed half wave. 2 ft (8. 3 281. Coax fed loops will usually have an SWR between 2:1 and 3:1. Overall, the antenna seemed to perform the best on 40 – 10 meters. 95. 7m) central support and a 12ft (3. With two manufactures in Taiwan and Vietnam, we could shorten leadtime and serve you with large quantity. 09m 10. We adjusted the spacing and increased the impedance to 800 ohms. Feeding an End Fed Half Wave Antenna ½ l •May work (somewhat) since the coax shield acts as a counterpoise: •Coax shield provides the return path for the RF field •Performance will vary with X, proximity to ground, etc •SWR losses on the coax can be a problem •Tuner needs to be at the base of the antenna X RF Field Tuner EFHW 6-80 METER 34′ END FED HALF WAVE ANTENNA. It's easy to deploy, tunes easily, and covers all the bands of interest. • The G5RV was originally designed as a 3 /2 antenna for use on 20 meters. End fed Zepp. I experimented alternating between a 67 ft (original design) and an 85 ft long wire radiator. No mast in this context means no structure taller than a person. 87 - Capacity Tuned Folded Loop Antenna for 20m. Any length of 50-Ohm coax to shack. End fed long wires must be hung at similar height to get the performance to be heard well. The FC-40 uses specially-selected, thermally- ZS6BKW Multiband HF Antenna. 00: MK114-CM-S: Antenna Mast Center Mount - holds folded dipole on MK112/114 - Sand line $85. 19 – Bow-Tie Folded Dipole Antenna for RX 85 – Half-Rhombic Directive Antenna for 20m to 6m Antenna Mounting > End Fed Antenna Adapter. 6 Ft (1. The antenna is 170 feet in length. I needed to make this longer though so I could run high power in a comfortable manner. Step#4 --- Attach the end of the antenna wire with the insulator to a high support. The Bandspringer is a multi-band long-wire antenna. So now back to 40m 20. Your feed line is essentially the counterpoise, so a separate one is not necessary if you want to keep weight I got back into the hobby after a 40 year absence. 0 81. The stations in the video are operating on the 75 meter band. End Fed Half Wavelength Antenna-- From AA5TB K5OE Antennas -- HF Antennas 40/80/160 55 ft Vertical St. Article 810 refers to article 250, Grounding and Bonding, so I also will discuss its associated requirements. I plan to raise the antenna by several meters this summer. The design is a continuously loaded, helically wound vertical antenna with a three-foot stinger. Vertically, the focus of energy is between 15 and 85 degrees. Known as ‘Invisible’ Toughcoat ‘Silky’, this 26 AWG, 19 strand 40% copper-clad steel (OD 0. This permits a short ground wire from the coax shield to the ground rod. For the 80 meters band, the length would be 130 feet; 160 meters would extend 260 feet. The measures used were exactly one half of those used for the W3EDP: 8. 0 8 83. Useful antenna for multi-band operation Lots of bands with no-tuner or tuner built-in rig Fed from one end sometimes more convenient Simple to deploy Horiz, Sloped, V or L Useful for limited space, RV, SOTA, FD Home-brewable Danny, owner of My Antennas, a former antenna designer at Cush-Craft, suggested an end-fed design, the EFHW-8010 for this configuration. I recently purchased a MyAntennas. Hurry up Solar Cycle 25. It is designed as a highly portable wire antenna, easily set up as an inverted V, horizontal, sloper, or in the case of higher frequencies, a vertical radiator. I then went to his web page and saw that one of his favorite antennas is the W3EDP End-Fed Multiband antenna. The UV resistant ABS plastic housing encloses an efficient matching network allowing the antenna to be fed with common 50 ohm coaxial cable. A standard recommendation (see QST, March 1936, p. The antenna can be fed directly with 50 Ohm coaxial line or, as the drawing shows, through a 1:1 Balun. During the PACC 2013 I used this antenna for 160 meters. It hears better than it transmit. For a coaxial fed, "One Antenna Do All" you can't beat the off center fed antenna. A real killer on 40M and certainly holds its own on 80M. The antenna has an SO-239 termination for use with coax cable equipped with PL-259 connectors (each sold separately). End fed wire on a telescoping fishing pole. 85. ) at the transmitter end of feedline will stop RF from entering your equipment and reduce receiver noise caused by common mode currents. Most commercially-made G5RV This calculates to ≈ 4. The 480XL coil is designed for use on tall vehicles such as 18 wheelers which do not allow the use of long whips and the overall height of the antenna must be kept below a maximum height. 1 70 ft hanks of rope - your choice - I used 1. ABS Foam Core is lightweight and easy to install. Dropping the ability to tune in 160m seems an acceptable trade-off for the advantage of having a shorter multiband end-fed antenna with no counterpoise cables on the ground. 3 . and it works great, i used a 4:1 balun and feed it at the 66 ft level. The bottom line is if you can put up a loop with the corners at least 25 feet high it'll work as well as anything else at that height and give you the convenience of having the other bands available from a single antenna. So easy to install mine is fed about 8ft from the ground straight down to a earth rod,these antennas are half wave just the same has a centre fed antenna but fed at the end. Includes adapters for BNC, SMA and SMA - female. Tuner not needed. Our flagship model, The Two Meter J-Pole Antenna comes in two different configurations, either as a one piece antenna for base station use, or as a two piece breakaway model great for portable operations. Antenna feed The λ/2-length antenna shown in Figure 2 is called a dipole antenna. ground plane antenna with radials . 10m -160m Multiband “Z The antenna was supported on a standardized three-story rectangular building known as an R12, with the antenna turntable on top. The FC-40 makes use of the control circuitry built into the transceiver, which allows the operator to control and monitor automatic operation of the FC-40, which mounts near the antenna feedpoint. If one were to forgo 160 meter (1. - End-Fed antennas have wild impedance swings. It can handle up to 150 watts. Note that the “G5RV” type antenna does not provide a 50-Ohm impedance on all HF Amateur bands. 8 6 85. Lightweight, low-profile, stainless steel VHF antenna stands at 3′ tall and is designed for masthead mounting to enhance transmission quality. 8 ft (10. QRPGuys 9:1 UNUN antenna. A single cable must be used between the adapter cable and the next accessory (lightning arrestor, inline amplifier, or antenna). Higher almost always The End Fed Half Wave antenna or the popularly known EFHW antenna has been around almost ever since the inception of HF radio. Sure enough, it works like Gang Busters! I believed that a half wave end fed would be about 450 ohms and thus a 9:1 unun would be ideal to suit a coax lead. 1 MHz 14. 5 ounces. That is: 468 / Frequency Mhz will give you the overall length of the antenna. It was fed via a length of RG58 coax from the nearby shack. 1/4 wave vertical 2m Moxon 3D Printing 20m 20m inverted V 20m inverted V beam 20m vertical beam 40m Amplifier Antenna Analyzer Antennas APRS Awards baofeng chokes contest Creality ender 3 CW digital DX Ed Fong EFHW end fed vertical experiments eznec Field Day FT-8 FT-450D FT-817ND FT-2900R ham radio ham shack HF Digital HF Portable High Voltage Antenna Project – HF QRP End Fed Half Wave Homebrew HF EFHW antenna for low power SOTA, Parks and field day events. (No heavy coax or inline traps in the antenna line like the “W5GI” or “W3DZZ”. dipole. I plan to mount the long wire in an unusual stealth fashion on my roofs eve. As erected in 2007 January, the center is 20 ft (6. Evolving from a simple end-fed Marconi for 80m, the idea was to use the opposing The magic lengths to use with the End Fed longwire is 29, 35. Works well with handheld HT radios, base stations, and repeaters. 6%, Location: Amplepuis, Ships to: Worldwide, Item: 283096767858 Balun Unun 1:49 - 49:1 For End Fed Half-Wave (EFHW) antenna 500W. Mine runs from the top of my porch - 10 ft above ground - sloping up into a neighboring tree. The W3EDP is a simple antenna: it comprises a 17 Ft. The main thing is The shortest antenna that has a chance of tuning all bands has an electrical length of 143 feet and should be trimmed to give a quarter wave resonance at 1. I ran both RG-8Xs to a two-position antenna switch in the shack, thence to the Yaesu and rather than trying to have actual QSO's, I fired up WSPR (Weak Signal Propagation Reporter) and let it run on one band after another, power out 5 watts. No signals found on 6 meters. The wire itself consists of 168 strands of #36 gauge woven copper. End insulators are supplied making suspension easy. k. The openwire feedline used in this specific antennas was home-brew 600 Ohm ladderline. 8 - 55 MHz Power: 1500W SSB or 800W CW RF Connection: PL-259 VSWR: Subject to configuration Length: 60’ Weight: 3. This is a 3-d wireframe of the pattern (in gray) with an outline of the vertical polarization. 25 TOTAL (Less Shipping) : $ XXX. He also shows us 1/4 WL High -85% 32. 95 - $437. An end fed half wave antenna is one of a specific length depending on the frequency that it is to be used on, for example, an end fed half wave antenna for 80 meters is about 130′ long. Extended Double Zepp – Longer than a dipole (5/8 wave or longer). Add a few inches for loops to connect to both center and end insulators for mechanical support. Stripping off the 10. It length was just 5m (16. Although this kind of “loaded” antenna will appear to be a quarter-wave The RF signal injected by T-1 propagates inside the coax to the opposite end (the terminating resistor end) of the antenna. 90 - Double-Delta Antenna 80m and 40m. As long as the physical length is longer than 0. 9 281. The radial wires make the antenna look like the frame of a giant umbrella – without the cloth – hence the The FC-40 is a microprocessor-controlled antenna impedance matching network designed to provide all-amateur-band transmitting capability with the FT-897/857 Series of transceivers, when used with an end-fed random wire or long whip antenna. antenna’s overall width is 68. 5:1. to 4:30 p. And, if you’re going to operate QRP, a small tuner is even pretty easy to build. Sometimes on 80 meters but there the 80 meters 2 * 20 meter dipole fed with open wire gave me more qso’s. It is simply a half wave end-fed on 80m which will resonate on all multiples of that frequency, loaded with a small inductance near the feed end. Of course, you need an antenna tuner to make this work, but I already have a tuner or two here. 32, "An Unorthodox Antenna") is an 84' long end fed and a 17' long counterpoise (6. NOTE --- Hanging the antenna at least 20 ft. Pulley was up about 80 ft Antenna was tested with end insulator at 0, 10, 20, 30, and 40 ft above ground End/Base-Fed Inverted-L, 90 ft version, Elevation and Azimuth Radiation Plots Below are presented the results of EZNec modeling of a 90 ft long End/Base-Fed Inverted-L, 45 ft high and 45 ft across. Some books say that you don’t use the counterpoise at all on 10m. Below is a schematic of the basic idea behind this antenna. The overall length of the antenna is 66 feet, one leg is 23 feet long and the other leg is 43 feet long. A quarter wave antenna can be mounted on a fiberglass or plastic body vehicle with the coax connected to one end of the antenna, center lead to antenna, braid grounded, voltage fed. ----- That is it! You are ready to start making contacts. Antennas for 160 meters on a standard half acre (~100 x 200 ft) suburban house lot pose quite a problem. Figure 1 depicts the construction of a Vivaldi antenna. END FED 6–40 Meter Multiband HF Antenna Introduction This project produces an inexpensive, multiband, end fed HF antenna matchbox that is quick and easy to setup and use. The antenna displays a low feed impedance, which allow you to feed it directly with 50-ohm coax cable. It's the ideal antenna to use with a KX3 or KX2 which have an internal antenna tuner. Check out his YouTube channel K8MRD Radio Stuff The “EFT-10/20/40 Trail Friendly” is an enhancement of the EF-10/20/40 MK II offering a lightweight but strong 22 AWG polystealth wire (as opposed to 18 AWG used with the MK II). Done this way, as the antenna moves in the wind, the 'antenna support rope' moves through the pulley. I've also had pretty good success getting through pile ups. Is in an inverted vee configuration roughly pointing 340-160 degrees (Location GF15VD28KX) with the top center apex at 43 ft. The total length of the dipole should be just under one-half wavelength for the operating band. 58-JMP M0MCX Banana Antenna – an end-fed choke sleeve resonant feedline T2LT antenna design 20m band End-Fed Choked Coax Dipoles (T2LT) 75 ohm to 50 ohm transmission line matching coax stub Don Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 5 Stubs • An open or shorted quarter-wave stub inverts the impedance at the input end. 5mm Dia EFHW-8010P- 200W Portable or Stationary Multi-Band End Fed Half Wave Antenna This is a 200W version of popular EFHW-8010 End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. end-fed long wire with a 17 Ft. 5 – 57MHz. Orientation was roughly north/south. 6:1), the first place to look is at the coax cable, and its connectors. Overall, the antenna seemed to perform the best on 40 – 10 meters The “magic length” of 85 feet can also be used effectively for a doublet. To make the mast sections you drill a 3/8 inch hole in the end cap (closely centered) and use the 3/8 x 24 nuts, bolts, and coupling nuts to complete the end caps. b. Counterpoise wire(s) close Antenna Mast Center Mount - holds folded dipole on MK112/114 - Green line $85. VSWR: 1. On 20 metres it is a full wave long and operates, no doubt, with a rather complex arrangement of radiation lobes. Antenna length 2. Antenna Characteristics Calculator The antenna input impedance is usually only of academic interest. The concept requires an antenna tuner and, because the SWRs can be high, balanced feeder is essential. 0 VSWR to 1:1 - the idea being that at 3:1 or less with good rg-8 or better coax on the lower frequencies, the Feb 28, 2019 - This Pin was discovered by Hawaii News Digest. The MFJ version has lengths between 23-125 feet long and has different coverage. 5-4. G5RV – 102 ft. Any counterpoise should be at least 1 foot above ground running away from or perpendicular to the antenna wire. I could not copy him on the vertical. 95 DX Off Center Fed Windom $69. When first-timers give me a call to ask for a signal check, I always inquire about their antenna. i built one for 160M using 180/90 ft. 85 m (6ft 1") b — wire, 10. Jetstream JTM8NMO - Antenna Mount, Mobile, 3. λ = 75 /F MHz (metres) This works out as 33. The antenna is pretty much Omni-directional Horizontally. 5 – 3. The Par Electronics EF-SWL is an end-fed short wave antenna optimally designed for 1-30 MHz reception. 18 – Bow-Tie Dipole Antenna. It is important to understand the feed line before discussing end-fed antennas, or antennas like the J-pole or Zepp. The Radiowavz Pathfinder Ranger is a end fed all band Antenna designed originally for the military as a grab and go antenna system to be deployed into tactical situations. Antenna design The immobilized Microstrip-fed Vivaldi antenna design is based on the parameter study so that the wideband performance could be improved in a systematic procedure. About The W3EDP 85 ft end-fed antenna. tops) I’ve used 2 and a half lengths of 20 ft. It can be configured to be used with dipoles and inverted vees as well. The end fed antenna is essentially half a dipole, it uses a good earth connection to complete the arrangement. 26 to 27 meters - 85 to 88 ft. MBITR Tactical Vest Antenna $124. Step number 3, Select ANTENNA or TUNER, and then, CHANNEL SCAN, OR AUTO TUNE. The antenna is constructed from a single length of 50 or 75 Ohm coax with a coaxial feed point in the center. 1: W8010: 80m/40m/20m 15m/10m : 1. (See Shack Talk, Your First Dipole Antenna for information on calculating approximate dipole lengths. End Fed Half Wave (multiband) – This half-wave antenna is similar to a dipole but the coaxial cable is connected to one end of the half wave wire, allowed easier mounting than the typical center-fed dipole. 89 - Indoor Loop Antenna for 80m. I've also done some RBN signal strength testing. Note that T-1 is an isolation transformer with two independent windings. Haven’t built one myself though, but I plan to soon. -Some 43-foot antenna vendors claim the antenna can be matched from 160-10 meters with your in-shack tuner. 55 +75. Antenna patterns are “reasonable” for local or DX work. It uses 14 gauge copper wire, center insulator is a SO-239 connector enclosed in a custom UV resistanat ABS housing. The coax would then be parallel to the counterpoise section of the antenna and its shield would pick up a fair amount of RF that you will have to (try to) stop cold before Antenna was rigged at W6GJB for testing over 5 mile path to K9YC Top antenna support rope goes through a pulley attached to another rope that supports one end of Glen's 80M dipole, which is strung between two tall redwood trees. 6" vertical x 7" horizontal x 1/4" diameter 2 lbs sh. This makes the end-fed antenna perfect as a multi-band antenna. High power end-fed The all band doublet antenna is nothing more than a 1/2 wave dipole cut for your lowest operating frequency and fed with twinlead, ladder line, open wire, etc to a tuner that will accept a balanced line connection. and 25-ft vert. Worked many stateside stations. Ruggedly The classic G5RV, 102 feet long - fed with 35 feet of 450 ohm twin lead, is average at best. 0 and 14. 10/20/40. lots of coax feeding the wire in the middle like in a dipole with the logistical complexities of a very large dipole or the end fed. The end fed feature adds convenience, but does present another issue. I chose the earchi 40-6m End Fed matchbox. ) either end –Drill more holes for antenna wires –66 ft long, centered at base of antenna, suspended at 8 ft . One of the cautions you sometimes see in discussions of the end-fed antenna are "avoid multiples of a half wave. Price – $30. Requires antenna tuner. Soldered Coax Cable – RG58 Hole in Antenna Drain Pipe wire 80m Trap 23 Turns RG58 40m Trap 11 Turn RG58 On a 40mm Dia former. org and I ended up building the K1TA transformer design from that deck. The antenna is fed with a 20′ piece of RG-58/U, 50 ohm coaxial cable with matching PL-259/adapter connectors at each end. The telescopic whip also uses the 3/8 x 24 standard. 8: A502HB: 6 meter bandwidth and produce a symmetrical end-fire beam with appreciable gain and low side lobes [5]. 24in 10. The resource is currently listed in dxzone. 0 to 54 MHZ and is rated at 2KW (SSB). 25 - 5. of twin-lead wire with one of its wires soldered to 33. The antenna is fed by an antennafeed that has an impedance of, say, 50 Ω, and transmits to the free space, which has an impendence of 377 Ω2. Trimming a dipole antenna refers to the adjustment of antenna length to operating frequency. RG8X coax, PL259 The End Wire Size can range from 16 AWG to 12 AWG. Using my arborists throw bag and lin e I quickly placed the line over a limb about halfway up the tree. 6:1 or less. 9 80. The problem with an end fed half wave antenna is that the antenna presents a high impedance, creating a antenna wire. It’s a random wire antenna and it isn’t resonant on any band which is why you can use it from 40 to 6m and on all bands. The antenna is fed with 450- Ω trans-mission line and a 9:1 three-core Guanella For now, as the antenna is designed, it would be a perfectly adequate antenna for ANYONE to put up if you're looking for a broadband antenna that doesn't have radials. The 80 Meter Off Center Fed Antenna (OCF80Q) is also a great multi-band antenna. The antenna as fed, matches reasonably well into a 50 Ohm Coax Cable Feedline. The Folded 40m Concept. Brass and copper elements Chrome-plated Indeed, the TUNE button easily swallowed the incorrect size of this antenna for the whole of the 40m band. 75 m (55 ft) Literature. A dipole has its feedpoint (where it connects to the radio) in the middle of the antenna, but an EFHWA’s feedpoint is at one end. As you see, the antenna is a sloping, center-fed, doublet. Swedged Masting for Outdoor Antenna A good roof antenna can pick up HD signals being broadcast up to The design frequency, the feedpoint impedance, will be between 80 and 150 ohms. The windom antenna is almost as old as the random wire. You won't work 5 band WAS or make the DXCC with it (unless you have a lot of time and patience) but what you WILL get is an antenna that works well with the broadband demands of Attenuation In Coax For Antenna Cables: Signal strength is lost in the antenna cable: It is best to have the shortest cable that will serve your needs. The DXtreme comes with your choice wire radiator lenghts ranging from 33′ to 124′, allowing homeowners with more space the ability of improved performance while offering those with limited space an antenna which will cover all of the amateur HF spectrum. Dual Polarized Standard Performance Parabolic Reflector Antenna. After thinking about this for a while, the antenna shown in Figure 9 occurred to me. It works just fine without flashing over at power levels up to 120 watts or so: I use the antenna with a barefoot Drake TR-7 and a Yaesu FT-747. The length of a half wave antenna is calculated using the following formula: L (ft) = 468 / f (freq in mhz). • It was used as a multi-band antenna because when fed with ladder line (not coax!) it is easy to match the on any band from 80m to 10m • A G5RV used as a multi-band antenna should be fed with ladder line. Tradeoff …. 95 End fed high-z antenna Capacitor installed. The center-fed arrangement is known as "two half-waves in phase" while the end-fed system is called a "one-wavelength antenna" or an antenna of the "second harmonic". The vertical used the SOTA beams 30 ft travel mast lashed to a chain link fence post. This antenna uses and assortment of 3/8 x 24 nuts, bolts, washers, and coupling nuts for the mast sections and coil. 5 7 84. This antenna works on 80 - 40 - 20 -15 and 10m. Results are encouraging but tuning them up can get a bit fiddley. 6 m); the height difference between its top and bottom is 26. This antenna does just as it says. Here’s how to get any length of wire over 60 feet long to work any band from 160 to 6 meters. The pole and the rope shown in the photographs are not included. The reflector wire improves the signal by about 3 dB over a single wire antenna. 5 ft. I am very happy with the antenna. Perhaps he is right for many things, but for ham radio folks evaluating antenna choices a popular answer for the height of a vertical antenna for the HF bands appears to be 43. The W1SFR End Fed 35’ Random Wire Antenna with 9:1 UnUn What is a random wire antenna and how does it work? The term “random” infers that you can use any length of wire you want as an antenna, while that basic fact is true, there are some practical considerations. 5MHz – 57MHz! It is not a 1/4 wave vertical, but an end-fed long wire type antenna with a matching transformer in a vertical position. TIP - To make this 'Limited Space' Off-Center-Fed Verical Dipole Antenna work better; try using an Active Pre 33 ft 10 metre six section telescopic aluminium mast . The end-fed for example is required only when the antenna is operated on an even harmonic to obtain some directivity and when the operator want to work on more than one band. The Inverted "L" is a 1/4-wave Marconi, fed against ground or a counterpoise such as radials. As shown in Figure 10. It is important to use a counterpoise. 050″ including 0. The antenna wire is cut to the length calculated by the formula, 1 /4 . 7 289. If you own an antenna fed with coax, you need RF chokes on the feedline! Using a balun with adequate RF choking impedance will improve the performance of your antenna, prevent pattern distortion, and prevent RF coming down the feedline, which can cause RFI. He has parallel dipoles for 80 and forty meters fed with 600 ohm twinlead, and a coax lead-in. Introduction. For NVIS and long range, tactical and base, for military, government and EOC. 5' for 20m). • Please be aware, the NVIS is not a DX antenna!!! This antenna system was developed for reliable communication (within 400 miles) with 100 Watts or less power. Performance may vary with your working conditions. Review Summary For : ULTIMAX 100 End Fed HF Antenna; Reviews: 73 MSRP: 85. End-fed radiators have the unique quality of resonating on the 1/2-wave fundamental frequency plus odd/even harmonics above! Broad-band matching transformer at feed point lets the entire HF spectrum be yours! SWR is so low you may never need a tuner. T2 is a FT-37-43, 10 turns bifilar. End fed / long wire antenna Multiple wavelength long wire End fed half wave antenna W3EDP antenna The end fed half wave antenna is an attractive option for many radio hams as it is able to provide multiband operation without the use of traps or stubs whilst occupying a minimum amount of space and not presenting a very ugly visual impact. The wire runs from the balcony or window to a tree or support away from the building. My top is 102 feet and the 300 ohm feeder 30 feet. Materials: four feet of ½ inch white PVC water pipe (10 ft @ $1. So far I’ve been A 2 m (6 ft) section of PVC tubing with an OD of 40 mm (1,6") will serve as "mast", stuck into a heavy cast-iron umbrella stand. Low-profile end-fed 1/2-wave stainless steel whip - If your goal is to get the voltage fed antenna resonant Push Options menu, select Optimization, push Advance button, select Goal tab, check Optional Z, and put 10000 to R. To make the best use of an End-Fed antenna, it should be fed with a transformer. ner. 4:1 impedance ratio is 2:1 turns ratio. On 20m the squid pole is an end-fed halfwave. This antenna will cover 6, 10, 20 and 40 meters. 5Lb. The extra length adds performance to the WARC bands as well. counterpoise or an amputated G5RV with a 1/2 length of its ladder portion transferred to the radiating wire: (what in End Fed Antenna Choices Recap End Fed Zepp uses ladder line for matching to coax End Fed Half Wave – even harmonics, requires special high impedance matching unit, high voltage at feed point Non-resonant end fed is shorter, uses simple matching, low voltage feed point, works many bands with shorter length, I experimented alternating between a 67 ft (original design) and an 85 ft long wire radiator. It includes an aluminum case and internal SWR indicator. This antenna is also effective as a receive antenna in the Broadcast band so if you are interested in using it for Broadcast listening, leave out the high pass filter. # 680 COIL. One challenge is the feeding UNUN transformer. operation to less than 220 Ft. Other antennas include the zepp, the half square and the Double Bazooka antenna. 9 82. Each handles full legal limit power. There are two ways to think about antenna and propagation prob-lems in linear media: in transmit mode and in receive mode. … The antenna This 10 - 160 meter tuned horizontal loop antenna is fed with 450 ohm ladder line all the way into the ham shack to an Palstar AT1500BAL balanced line antenna tuner. I can now run 500 watts + on 80 meters using CW. 9% Fres. This antenna is a half wavelength at the lowest frequency of operation, and then as the other bands on which t can be used are harmonically related, it provides a multiple number of half wavelengths. Here are some photos of one of my 9:1 baluns. DX-LB Low Band Dipole Covers 160-80-40 meters with an overall length of only 100 ft. 5 m between 20 m trap and 40 m trap and 11 m between the 40 m trap and the end of the antenna. 6 m (84 ft), because such a length permits parallel tuning of the antenna tuner circuit on all bands from 80 to 10 m with conveniently located coil taps in the antenna tuner coils for each band, or, where the alternative form of antenna tuner employing a three-gang 500 pF/section I found the NVIS antenna to be a useful addition for FD. You may put a little value to jX. It consists of an 85ft wire fed against a 17ft counterpoise (attached to the earth point on the ATU). The problem with end feeding a half wave is also its advantage. The second change we made was to increase the input impedance. ™ 79-ft. For masts with 24mm top socket, for end fed dipole antenna up to 38. It may also be used with many of your antenna projects where a 4:1 Unun is needed. The coaxial cable that comes from the antenna also needs to be connected to the GES. 29 = 4 feet for 52 Visit Diamond Antenna on Facebook & Instagram! Office hours, Monday through Friday 9:00 a. The inventor - I think you know him as G5RV - created a gain antenna for 20 Meteres. However, Beverage antennas are generally about 500 ft long. An Off-Center-Fed (OCF) dipole with total span of 84+17=101 ft, with the feed point at 1/6th of the total span (101 / 6 ≈ 17 ft = 17%) from one end ( = 83 / 17 OCF). * Receivers with an SO-239 External Antenna Input Jack. The transformer assures a match with NO antenna tuner needed and it’s not at all fussy about height. It is used in gravity fed waste elimination systems. The antenna wire lengths before trimming are 5. J-pole . Sidebar: This antenna is very different from antennas fed with coax which require a tuner in the shack. A practical half-wave antenna made from wire needs end 3750 124' 9" 38. For best results, use the longest wire shown on the table that will fit your installation constraints. 100 65ft 11in 20. End fed half wave antenna: One method of providing a multi-band antenna for the amateur radio or ham bands is to use an end fed half wave antenna. Product Manuals Download Product PTP 5 GHz DUAL POLARIZED STANDARD PERFORMANCE ANTENNA SPECIFICATION SHEET . I plan to give it a try sometime. "I received my third balun from Balun Designs this afternoon. A multi-band end fed wire antenna presents a potential problem in that a ¼ wave length antenna cut for say the 80 metre band will present a feed impedance of about 70 ohms however when the same antenna is used on the 40 metre band the feed point impendence will be several thousand ohms and therefore difficult to achieve a match even with a Excellent antenna,I have the 80-10mtr efhw, I have mine in a inverted v type configuration about 45ft in the centre where the maximum radiation occurs. This is accomplished by using a ground block located as close as possible to where the coaxial cable enters the building. A full-size Delta Loop, fed in the bottom corner, is a good low angle radiator and is great for working DX. Length, Stainless Steel Hardware, SO-239 Connector, Each Not Yet Reviewed Part Number: PEZ-EF-80 More Detail An 84 ft long end-fed antenna wire, with a "counterpoise" wire of 1/5 the length of that antenna wire (i. 1 284. Cut your wire in half (each end is now 234/frequency), and insert a center insulator in the middle. Seller: hifi1200 ️ (2,304) 99. 8 286. The AH-4 makes everything equal. ) The tuner that I made for mine (using a big brass variable cap that I bought to make a TRF in the late 50's!) covers 80 m to 20 m without changing the inductance though I only use it on 80/60/40. 2 251. 1 shows the two essential dimensions of a real dipole. The trimmer is tuned for resonance at 14. Broadband: TX 3. INVERT VEE = 0 Foot inf Inches in overall length and 0 Foot 0. 3:1) on 80m and 40m, and be 102' Radiator length (#14AWG HD stranded copper wire) fed with heavy duty 300 Ohm ladder line. The unique design characteristics of End fed longwire or random wire antenna. 8-2 MHz) operation, an antenna with an electrical length of 74 feet should suffice and should be trimmed to give a quarter wave resonance at 3. Keep in mind that every end fed / vertical needs some kind of counterpoise to push against and in this case that's the coax , so don't forget a line choke near to your transceiver. Nevertheless, the EFHW antenna had in the past, been rather sparingly used by amateur radio operators due to various reasons. 1 – Various types of antenna systems. One of my favorite single band portable antennas is the end fed half wave antenna . This automatically tunable antenna coupler is an ideal solution for this type of installation due to the fact that the rain gutter looks like a non-resonant end The Inverted "L" is a 1/4-wave Marconi, fed against ground or a counterpoise such as radials. The ULTIMAX DXTREME end-fed antenna covering 1. 51 meters), with a 40 ft (12. This antenna is essentially a transmission line antenna. 5, 41, 58, 71 and 84 feet I use a 29 foot wire with my PackTenna 9:1 balun for 40m-10m and then add a 28 foot length for better coverage on 80m when needed. MFJ-1984LP, $39. 0 m) above ground. I wanted high efficiency 40 Meter antenna with low-angle radiation. long wire for a total physical length of 85 Ft. But to be strictly correct, that antenna is a dipole only at the lowest frequency of use. Work the world -- with high performance -- in a fraction of the space! Computer-designed hybrid wire antenna for the modern era of ham radio. -One vendor says to use 150 feet of RG-213 for best all-band operation of the 43-foot antenna (so you can tune from the tuner in your shack). 8’ (2. The W3EDP is an 85-ft. I use it with a collapsible 32 foot fiberglass pole from MFJ, when working from my RV. 2 MHz would have a total length of 65 feet. Rev10072017 . 5 83. B. FT-140-43 ferrite toroid impedance transformer (UnUn). Even for NVIS close in work, the ground loss increases as the antenna gets lower to the ground. topography, proximity of nearby structures, configuration of the antenna wire and choice of ground or counterpoise. 5 Ft. The tower on the right in the picture supports the antenna as described above. Having played around with end-fed antennas, it looks interesting. CW has a much higher duty End-Fed Horizontal Wires (EFHW) cover multiple bands with-out traps, stubs, or resonators. ) When the dipole is properly trimmed for an operating If the antenna can't be erected as a vertical due to height restrictions it can be run as an elevated end-fed antenna of any length. All primary antenna cables use N(m) connectors on either end. 88 - Indoor Loop Antenna for 80m to 30m. Model # 85-071 Store SKU # Yes just screw the antenna into one end an cable into other end of adapter. replacing the most important and effective part of your antenna with a non-radiating inductance. The National Electrical Code covers the aspects ICOM, Motorola, Kenwood, Yaesu VHF, UHF, 700/800MHz Two Way Portable VHF UHF Hand Held Radios . The antenna is simple to deploy, folds up easily for transport, and weighs under a pound, yet, with the proper length of wire, can work the 80-10 meter bands easily with the built in antenna End Fed Half Wave Antenna, 3. 5 78. 1220. There is no voice communication involved, everything is done via text making data mode QSO's (contacts) a great way to learn basic radio etiquette. UK Antennas Half wave end fed antenna, 40m, 20m,15m and 10m with no ATU needed. My finalized portable End Fed Half Wave Antenna using QRPGuys "No Tune EFHW transformer" and 59 ft of Sotebeams light antenna wire cut for 40 meters. i used to have a full wave 80 meter vertical diamond shaped wire fed at 100ft that didnt work as well. The antennas are AH-7 for… Ideal for supporting, delta loop antennas, dipoles, long wires, G5RV's, end fed etc etc. End fed wires are possible using a 49 :1 balun and 33 to 72 feet of antenna wire. A centre fed (or offset) dipole either needs traps to make it reasonant on each required band or, in the case of the G5RV, a compromise can be struck where it isn't so good on any band but tunable on all. 86 - Fan-Dipole Antenna for 80m to 6m. Using the EFHW for 20m at GB0CMS 3. 0 15 77. Typically an UNUN is made for 1:49 impedance ratio. We supply two 5 ft whips to cover 10 through 80 meters. A big thank you to the Main Trading Company for offering this product. Set the capacitor about midway. Antenna Project – HF QRP End Fed Half Wave 07/03/2021 Antenna Project – 2m Halo for 144. After months of research I found a way to make the transformer handle high power. e. 1 5 86. worked alot of dx from africa including libya, jordan etc with 100 w on 17M. Simply hang the far end from a tree limb -- the coax is at the bottom. Figure 9: 20 Meter End Connected, Center Fed Balcony Antenna Made From RG-58 Coax. Below is one example of how to build an 80 metre band long wire antenna for a house with a smaller garden. Power for the pre-amplifier and the relay is via the centre conductor of the coax feed-line. My antenna is NOT an end fed Dipole. Wifi antenna booster & wifi signal enhancer - The S Band, High Gain Antenna, UL 235A 498 is a Broadband Directional Antenna which provides continuous communications coverage across the spectrum of 2 2 GHz to 2 5 GHz and also we can use as wifi signal enhancer . Overall length is 40 ft. It only needs to be equipped with a vibrator of 20 meters in length, which can naturally resonate in the four amateur bands of 7, 14, 21, and 28, and the influence of the height-changing resonance point is very small. The typical bandwidth is: If most of the strongest signals are from within 50 miles, an indoor antenna will work better. One of the most popular antennas today is the end fed antenna due to it ease of installation, portability and stealth in various installations. See this link for more info. If possible use a balun or choke as described earlier. 5:1 – (3:1 tuner required all radio tuners work) Step#3 --- Run the other end of your coax to either a choke balun, your antenna tuner, or your radio. A Double Zepp is a center-fed 1/2 wavelength antenna. Base Antennas, HF EFHW Dipole Antennas, Portable Antennas. in seconds . 8 265. It consists of a 30-ft length of coax between the antenna tuner and the UNUN and a 30-ft single-wire end-fed radiator on the "output". Proudly powered by Weebly When it comes to low end performance on any Terminated Folded Dipole, there is no substitute for wire. 1 MHz 10. The 85 ft wire tuned 10 – 160 meters. G3YEU Notes:-The first 6ft (1. At VHF low-band, a quarter-wave monopole can be 2. Drawing 2, KW2P Coax Beverage with End Feed. An overview and where it all started 2. This has the disadvantage of half the antenna being in the room and the high current part of the antenna being near the building. 13 MULTIBAND Parallel (Fan) Multiband Antenna 10 m W8NX 5-Band Dipole Antenna Since the dipole is typically a half-wave antenna, it can be impractical on small lots. 5 pounds Polarization – Vertical, Horizontal, Sloped Connector – SO-239-50 ohm SWR 2. the MFJ-902B is a 200 watt PEP rated T-network (transmatch) and will tune end-fed wires and coax lines. Since 1:1 match is achieved at the feed point in every installation, no tuner is needed so the antenna can be "remoted" without mismatch loss when using a longer piece of coax. ) 6. space. Possible configurations are an end-fed inverted-V (feed end starts at ground, high in the middle) or an end-fed slanted wire (feed end starts at ground). 3 84. A ‘Windom’ type off centre fed dipole (fed 38% along its length) provides around a 200Ω feed. Wire antenna pulley block. However, try to avoid running the coaxial cable down vertically from the antenna's feed point, if you can. endfed, endfedz, ft-290 The so-called End fed Zepp (EFZ) is often cited as the basis for many more recent antenna designs, and is leveraged to provide and explanation… though few hams understand how the EFZ actually works. W735: 80m/40m : 1. Benefits: • Fully Preassembled at the factory – simplifies installation on site and guarantees “factory tested” quality • Warranty – Industry leading 7 year warranty At 100W the T157-2 would start to take a little strain as far as heating is concerned but that’s quite normal! An odd 7. On 40 and 20, (my main interest) the lowest SWR occurs at the bottom of the band (7. It shows field strength measurements I made some time ago, which compare a 30ft vertical fed with an auto-tuner at the base vs. This link is listed in our web site directory since Monday Oct 24 2011, and till today " The W3EDP 85 ft end-fed antenna " has been followed for a total of 1875 times. - $40 DBJ-220 - Base station antenna (220-225MHz) Maximum input power 75 watts $30 30-ft horz. An external wide-range antenna coupler must be used with this antenna type. 35m with 80m coil. This includes the ends of the wire elements, which are actually the most sensitive part of the antenna. (See Reference Links: Multi-band End-Fed Antenna) 5/18/2020: Replaced the 40m 20. transceiversÚ, when used with an end-fed random wire or long whip antenna. If the loop is in the shape of square or large rectangle, the SWR can be below 2:1, but will not get much below 1. Here’s the video of the traps, and here’s the video of the 49:1 base. Field Day June 26-27, 2021. Just look at the following example: 20 meter wire is a half wavelength for the 40 meter band, two half wavelengths for the 20 meter band, four half wavelengths for the 10 meter band and 3 half wavelengths for the 15 meter band. These are rare in North America but have been popular for years in japan. single wire for a total length of We continue our antenna offerings with this single band, 80m-10m end fed half wave wire antenna. Louis Vertical-- By Dave Gauding, NF0R G8ODE OCT 2008 iss 1. Actually, it’s a design from ZS6BKW (aka G0GSF), similar to the G5RV, but it actually resonates on five bands, (well 6, actually) and doesn’t rely on a tuner (ATU) to make it work. RX 2. 8 metre length of wire mounted as an inverted V, a non-resonant 6. HALF WAVE END FED HWEF / ANTENNA / RADIO AMATEUR BLOG I made this antenna 40-20-10 with a FT-240-43 core and after tuned the antenna you could add a 85 G7FEK Limited Space Antenna G7FEK Multi-band “Nested Marconi” Antenna - 2008 Version (rev 5) This antenna was first conceived as a simple dual band antenna in 1988, in an attempt to achieve sensible dual band operation in a small garden of 14m (46 ft) length. Ultimately, the goal is to use a very low loss antenna/feed system which is much more effective than putting a lot of power to the antenna! Typically, an antenna system of this nature can easily be in the 95% to 99% efficiency range. 10 / ft; On-Sale Products. The plans for it are available on the Emergency Amateur Radio Club of Hawaii's web site. 4 296. When calculating optimum lengths, we must use the velocity factor of the feedline. 8m) of 100ft (30. When you install your EFHW 8010 (or any end-fed) it's best to either a) get both ends of the entire antenna as high as you can in the air and run coaxial cable from the feed transformer / balun back to your radio, or b) install the antenna as a "sloper" with the coax feed end at least 10 feet off the ground and the distant end as high in the the antenna balanced. The computation method is also touched on. ) from the feedpoint to the house. The balun is about 3-ft above ground. 66) end support. It should read virtually 1:1 SWR with no reactance at all. Above is a diagram from the ARRL Antenna Handbook (Silver 2011). It is also a good antenna for shortwave listening. ZS6BKW - Horizontal or inverted V layout So, it’s a cousin to the G5RV (which only resonates on 14 & 24 MHz), but better as it needs no ATU on 40, 20, 17, 12, 10 and 6 meters. This drawing shows up several time on this page, however the other instances will have different annotations. April 7-12, 2019, I operated VP5/W3PYF from Turks & Caicos with the LNR Trail antenna and my KX3 running off AC power at about 11-15 watts. the same antenna fed a 4:1 balun wound with 75 ohm coax on two separate type 43 ferrite cores and a remotely sited tuner fed via 200ft of low loss LDF2-50 coax vs. 7. However, we can reduce the space needed to a quarter wavelength if we decide to use an end fed antenna. 6:1 continuously from 3. Table 1 146 MHz Lindenblad Antenna Characteristics: Dimensions given in centimeters, impedances in ohms. Easy to deploy, heavy and sturdy enough to be thrown over a tree limb with ease and robust enough to run demanding digital modes like FT-8/FT-4, RTTY, and PSK31. This formula takes into consideration the capacitive "end-effect" from insulators which shortens the physical length requirement for the equivalent electrical length. Single band antenna when fed by coax •15. 160-6 METERS END-FED ANTENNA The ULTIMAX DXTREME end-fed antenna covering 1. 0 mhz). Well, I’ve stumbled across something that may work—the W3EDP antenna. MFJ-1984LP, $49. - If your goal is to get the voltage fed antenna resonant Push Options menu, select Optimization, push Advance button, select Goal tab, check Optional Z, and put 10000 to R. wide. The same is true for an 80-10 meter coverage, shortened antenna to 110 ft. A shortened multi-band End-Fed Half Wave (EFHW) antenna for 80-10m Steve Nichols G0KYA A shortened multiband antenna, about 23m long, for 80m-10m that offers low SWR (1. m. Once you have installed the antenna 4 Stealth antennas for the loft Table 4. Center-fed dipoles experience current nodes when the feedpoint is any even multiple of the frequency on which the length equates to an electrical half-wave. I have built a number of these on different bands and found the design extremely repeatable. 8 metre counterpoise, this antenna is resonant in the 40/20/15/10m bands. 0 m); and the longest wire is 35. HybridDX™ vs. 015″ jacket) but is also super small for that ‘low profile’ antenna or pocket ‘weekender’ long wire. open end decouples that frequency from the 20 ft 43 ft Vertical Vs Top Fed 66 ft X 66 ft X 25 ft High 80 m Horizontal Loop Antenna Z = 76 +j4 Eff = 54. Elevation patterns and Azimuth patterns at the peak of low angle radiation are plotted for all ham bands 80 Meters through 6 Meters. Elevation patterns and Azimuth patterns at the peak of low angle radiation are plotted for all ham bands 160 Meters through 6 Meters. The radiating wire was a 30 foot length of stranded 16 gauge speaker wire. On 20m a parallel tuned circuit matches the high impedance of the 20m end-fed halfwave and the 2 turn secondary winding provides a near 50 ohm feed point. 2 m or ≈14 ft for an 80m end-fed. ”. 84 - Mini-Horse Yagi Antenna. A well designed matching transformer at the end feed point facilitates this antenna configuration. 3 9 82. The reason was FT-RF is expert in antenna fields including Jammer antenna,Military antenna, RF/EMC/EMI antenna, RF Accessories,RF Microwave Antenna,Microwave components and so on. (It doesn't matter what kind. The feed impedance at the very end of a half wave is thousands of ohms, usually somewhere between 2000Ω to 5000Ω, which we need to match to our 50Ω transceiver. 80 - $ 1. Another is, "Antenna here is a 100-foot, end-fed wire about 15 feet above ground. My criteria means the whole antenna is lower than 6 feet above ground level. By design, ununs are wound is such a manner that they provide little or no RF choking. adjacent structures and ground conductivity). First, it is important to understand the difference between the end fed half wave and a random wire (or “long wire”) antenna: the random wire is just a piece of wire that is matched to 50 Ohm impedance using an antenna coupler, sometimes adding a 9:1 unun. Be sure to check out the many posts about the 43 foot antenna here on this web site. This Dipole system is fully adjustable from 10 to 80 meters. The parking lot just to the north of the lighthouse is located behind a very large dune at the top of which is a rather tall tree perfectly suited as support for one end of an end fed wire antenna. • The toroid core is an Amidon FT-82-43. Using a 19. Max Power: 250W SSB Sounds cool, i have been thinking of a end fed 160 meter antenna hanging off my truck at speed in the desert suspended by a kite at the end insulator to keep it flying and a light for nightime conditions. If you are after efficiency, coax should never be "tuned" (except in the case of minor mismatch, for instance changing a 3. The long end was tied to a tree, again, using insulated rope, and with maybe five feet of distance between the antenna and the closest limb, at around 35 feet. I’ve been using the W1SFR Random End Fed antenna with my KX3 and Yaesu FT-891 radios for many months now. 00: MK114-NPS-S A shortened multi-band End-Fed Half Wave (EFHW) antenna for 80-10m The 80-10m EFHW This is a shortened multiband antenna, about 23m long, for 80m-10m that offers low SWR (1. End Fed Antenna horizontal North- South up 20 feet WB2TQE 1721 85 •Try FT-450D with SignaLink. So far received 2 votes for a total score of 9. Ver2cal'Wire'Antenna' • Actually'a'ver2cally'orientated' resonate'1/2'wave'dipole'with' the'earth'being'the' return ' half' • Due'to'poor'ground' conduc2vity'a The Par End Fed is 45 ft. Remember to cut your antenna wire longer than shown here and then adjust the length to the desired frequency. Usually, the 'antenna support rope' is smaller than the pulley support rope (the one in the tree). , We provide OEM, ODM and OBM services. Plugs directly into the center conductor of the coax jack on most table top shortwave receivers as well as HF transceivers. Also lots of chokes on computer wires. The W3EDP antenna was first described in the ARRL’s QST magazine in 1936. 5. 64 wave length elements fed in phase. Works with a 4:1 UNUN. It's assembled onto a homebrew wire winder. A 40-foot cable is included 4-Band OCF is 68 feet long, 7-Band is 135 feet long, and 8-band is 270 feet long. " When I hear 160-meter antenna descriptions of this type I say "ouch!" In effect the W3EDP is an EFHW for 80m (126 ft top, 17 ft counterpoise, just under the traditional 132 ft. I've logged over 20 countries and many states. 3 299. By the reciprocity theorem both methods will predict the same performance. Buy Everbilt 1/2 in. Feed Lines (85) Ladder Line (8) Balun Kits (8) 531-Antenna Wire, 14 AWG Copper-Clad Steel Stranded HDPE Jacket $ 0. The G0KYA EFHW – an end-fed half wave monoband HF antenna, plus two multiband versions (New!) A practical, cheap monoband or multiband (new!) vertical antenna that is great for DX and very cheap to build. It seems to be quite broadband. However, an inductor (coil) at the base of a monopole adds electrical length, so the physical length of the antenna can be shorter. wish i build it alot earlier. 13 127' 5" 38. The exception to this is corner-fed loops, they do have a strong lobe as the models predict. " The very valid reason for this is that the high impedance of the feedpoint was outside the range of most transmitters and external tuning units. See more ideas about antenna, ham radio, ham radio antenna. (unbalance to unbalance) torrid matching transformer that will match the high input impedance of an end fed antenna into the range where most antenna tuners can produce good performance. 5 ft and 186 ft / 33 ft The entire antenna is #12 stranded insulated copper. The Antenna Tuner will load an End Fed Long Wire effectively, especially if it is cut to aprox. On the receive side, the standard 160 meter antenna is a Beverage of some form. 5:1 or less with the 5 ft whips or using the Scorpion Cap Hats™ for a smaller foot print. 5 ft (40 m) 1/2 WL High -92% 68 Ft 14 AWG Wire Fed through a 4:1 Current Balun 2014 Field Day Antenna 2015 Field Day Antenna Single 40/80 The 480XL will tune 75 meters with a whip as short as 3 ft without using a capacity hat. 3' 4. 1 m (33 ft 2") L 34 pH 150 pF, 64:1 impedance monopole is often called a “whip” antenna. 00 US Description. stretch of twin lead with one of its wires connected to a 68 Ft. 1 In fact, it looks more like an end-fed 1/4 wave 160 meter antenna (130 ft or 39. On the transmit side, an inverted L or similar antennas are pretty standard. The following chart shows the measured SWR on the 80m thru 10m bands under four different sets of conditions: If I had to run an indoor apartment antenna for SWL, it would likely be back-to-back helicals, horizontal, center-fed dipole. This way, the antenna can simply be stuck onto the top of the mast. Then check the SWR at 1. "Every TV has it own way of doing a scan. £3. This specific matchbox was built to match the openwire fed dipole of Alfred Kluss, DF2BC. TV Antenna'S InstallED IN Most homes in this area are able to receive the local channels (ABC, NBC, CBS, Fox, PBS, TBN, and several other networks) with a correctly installed outdoor antenna. The free end of that rope is tied off near the ground. The RadioWavz End Fed Half Wave (EFH) antenna product line was originally designed to provide channelized He gave me a 559 and I gave him a 539. #12 Wire 1/4 inch dia. an Odd Quarter Wave-Length of your target band 186 ft / 16. performs well, but is “a cloud burner,” good for local contacts within 500 miles. The feed of this antenna is placed 1/3 of the way in from one of the end insulators which would place the balun 23 feet in from the one end. When mounting on a vehicle, a quarter wave antenna MUST be mounted on a metal base. At the manufacturer?s recommended height of 20 feet many signals on the horizontally orientated TAK-tenna were within one S point of the reference antennas. packtenna. 85 GHz . 35m wire. 00: MK114-NPS-G: Antenna Mast Non-Penetrating Mount - use on hard surface or soft sand - Green: $945. The antenna should not cross any power lines or be where people can contact the wire. A vertical seemed the obvious answer, a naturally low-angle radiator. This material is very strong yet can easily be coiled like a rope for portable work. ABS Foam Core pipe is for drain, waste and vent purposes only. g. As for 160M…. 0 to 54. The Balun on the end matches the 450 Ohm Open Wire Line into a 50 Ohm Coax Cable. Look at the following backyard antenna setup. The main category is W3EDP Antennas that is about W3EDP END-FED Antenna. Rather than reinventing the wheel, every antenna project Aug 15, 2019 - Explore William Wheal's board "ANTENNA" on Pinterest. So do all antennas, but not at the design frequency - there, at the design frequency, the terminal impedance is quite predictable. Marconi antennas or end-fed antenna systems located far from earth require counterpoises. No worries! Just replace the "outboard" wire sections with longer wire, and "prune & tune" down from there. Here’s how to make one. 31 MHz. Fig. Specifications: Frequency: 1. 1. 88m 21. and covers 1-30 Mhz. a broadband antenna of the same element length. It results in SWR’s typically around 1. Use a 90* Elbow "F" Connector with an "F" Connector to 1/8" Mono Plug 'Adapter'. Elevated HF Antenna 1Notes appear on page 38. 4 Watts are lost through the toroid. Other feed ar- I've done some A/B antenna testing with my stealth 84' end-fed-long-wire and the DX Flagpole. odd quarter wave-lengths of the target band is important. Put 0 to jX. 05wl matching counterpoise) and drilling two weep holes in the appropriate position, I had a 10 meter EFHW antenna up in less than ten minutes. 73. The design appeared in TT (RadCom) It’s only 90 ft long (27. 00. 00 1 8-inch long 1/4” x 20 eye hook $1. For a conventional antenna I would normally split this wire in half and place a feed point in the center. The 3 radial wires are spaced apart and held at the appx. I understand they have been discontinued for many years. 0 MHz rated at 2 KW (SSB) The DXTREME models are the ultimate end-fed antennas with the capability of covering from 160-6 Meters and able to handle legal limit power handling with ease. 95 - $279. 2 KW CW & RTTY. Double Extended Zepp Antenna. That is the LNR end fed dipole which is for specific bands, ie. . Buy an Icom AH-4 end fed tuner (auto coupler), attach your wire antenna wire to the hot end and run a short wire from ground side to a ground rod or counterpoise wire and enjoy. 1mm diameter The Antop AT-800SBS also has a table-top stand for indoor use, but this 85-mile antenna was at its best out in the elements, where it pulled in 68 watchable stations. (3/2 λ) doublet with 31 (1/4 λ) ft of ladder line, then fed with coax. QRPGuys Mini No Tune End Fed Half Wave Antenna is designed as a mini highly portable 80m-10m end fed half wave wire antenna, easily set up as an inverted V, horizontal, sloper, or in the case of higher frequencies, a vertical radiator. And I’m going to keep this VERY simple Simply hang the far end from a tree limb–the coax is at the bottom. There is much more that can be written about this antenna and its matching, but that was not my aim. Therefore, when Base End-Fed antenna for 20m, 10 meter in length. Uses glazed ceramic end insulators. will depend on the matching range of your matchbox. It would be ideal to mount the antenna above the roof line or at least 10ft off the ground as the signal radiates more from the side. The FC-40 uses specially -selected, thermally-stable component s, and (Inverted Vee) OR two end supports (Flat Top) on a typical city lot. Since you ask for coverage from the 160 meter band and up, here's an 200 $\Omega$ SWR plot of a 266-ft long center-fed dipole in free space: Bev AH6NF (YL) made this antenna, tuned and ready to operate in less than one hour. 468 ÷ freq (mHz) = Length (feet). In practice I think the end impedance is affected substantially by the antenna configuration and local environment (e. The antenna comes with the choice of a wire radiator length ranging from 33' up to 124', allowing homeowners with more space the ability of improved performance while offering those with limited space an antenna which will cover all of the amateur HF spectrum. 2019-12-19 Following are some potentially helpful graphs and data of my two EFHW antennas taken from the NanoVNA-Save software. 5 268. 9 MHz continuous and is rated at 2 KW (SSB) , 1. RSGB 2002) It’s only 90 ft long (27. Shorter length counterpoise wires can be used if operation is confined to 40m or higher. When spiral wrapping the antenna wire, cut the wire slightly over-size, and wind a few 1" ( 25mm) spaced turns at the bottom. By John Portune W6NBC . 100 25ft 10in 7. Also covers 30-17 & 12 meters with an antenna tuner. That is because you are using a non-resonant antenna system when you use ladder line feed systems for multi-band operations. The double extended Zepp is a dipole type Antenna consisting of two collinear 0. Terminated Sloper Antenna. com in a single category. 8, 1. These can be unwound during tuning, and The Hy Power Off Center Fed Antenna is a very efficient and effective multi band antenna. Cable ties hold the toroid in place. Antenna performance and 2:1 VSWR bandwidth is site dependent and varies with height above ground and surrounding objects. 9, and 2 MHz. 1pc Balun 1:49 - 49:1 For End Fed Half-Wave (EFHW) Antenna 100W PEP 5-35 MHZ: Description: This is a 49:1 balun for the end-feeding antenna. You may feed this antenna with a 4:1 balun. No Antenna Tuner Needed ! End Fed Half Wave Antenna . The end fed offers many alternative options. antenna or simply an antenna you take with you for a field operation or when camping. 2 MHz 18. The coax is about 100-ft long and runs on/in the ground. Once you get all done, and discover the SWR at the transceiver end of the coax cable is high (≥1. Use an "F" Connector to PL-259 Plug 'Adapter'. Also includes a 6 ft extension cable. ☜Return☜ At ground level it performs as an NVIS antenna on 40 and 80 meters. com EFLW-1K, 53 ft. 2kW PEP : 85. 00 1 66 ft of 14 Gauge THHN insulated wire $8. counterpoise. The direction of fire is broadside to the antenna. I tried other cores with less success: 40m and 20m SWRs were usually ok, but on 10m I measured SWRs of 2. A quick look at the Maldol series of base coil type assembly whip antenna. Anyway, I really liked the K1RF slide deck posted at gnarc. The lead-in goes un-der the window sash into the shack. I have been using the (former) RadioShack shortwave antenna kit for years to make a simple end fed wire for my ham radio station and I am glad to see MTC offering this new kit. The MFJ-16010 is an L-network intended for high-Z, random end-fed wires and is rated for 150W PEP. I used solid copper wire AWG 9. Post by techiesteve » 21 Apr 2013, 09:02. this antenna works. It is called the EFHW-8010. I was able to light up several USA and EU skimmers on 40/cw a couple of evenings ago circa 0001Z with the DX Flagpole. 45 degree angle with 3 pieces of thin bamboo arranged in a triangle. All you need is wire, insulators, and some support rope to build this simple Important: The antenna kit (part number 093-15202-001) includes a short adapter cable with BNC(m)-N(f) connectors. 6 293. My LMR 400 coax tunes this antenna to 20 & 17 m. Key Features. Although not necessary, a 1:1 isolation/choke balun (models, 1110, 1113, 1115 etc. Such systems are sometimes described as "groundplanes" or "elevated radials", although by definition they are also counterpoises. Raising the antenna height makes a difference for any antenna. 7m wire had wider band width on 80m, but notice no better performance than 40m 20. OCFD. end-fed wire with a 17-ft. End-Fed Long Wire (160-6m/1kW-max) antenna and a MyAntennas CMC-130S-3K Common Mode Filter Choke. * Radios with an 1/8" External Antenna Input Jack. This antenna is EXTREMELY easy to assemble, requires no tuning or adjustments and VSWR is under 1. What is the best height for your antenna? The author considers factors that can help you decide. The garden is only 30 ft long, and thus a dipole for 40m upwards would have more kinks in it that a dogs leg lol. End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. The Title of this antenna is not the 40-6 meter End Fed HF antenna I purchased. x 25 ft. For simplicity, I set this antenna up as an inverted-v configuration. The matchbox with a BNC connector is much smaller and the total weight of the antenna comes in at only an amazing 3. 12m 14. "I'm using my 35-foot-high 75-meter dipole with a Transmatch" is one common response. 7 MHz 5. Both wires tuned 10 – 80 meters. 95 - $285. will actually help your wide range antenna tuner cover the lower frequencies easier. If fed off center, say at 30%-70% point, impedance is approximately 200 ohms and can be used on multiple bands with an antenna tuner. EFHW featured in "Stealth Barker & Williamson HF broadband antennas for ALE radios. EFHW-8010P- 200W Portable or Stationary Multi-Band End Fed Half Wave Antenna This is a 200W version of popular EFHW-8010 End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. 9 m). Charlotte Pipe 4-in x 10-ft ABS DWV Pipe. Easier with Inverted Tilted Vee Andreé Knott, DD3LY Email comment, 18 April 2002 I built an "inverted tilted vee" antenna for my QRL with two 250 Ohm resistors at each end and a 50:450 Ohm homemade Guanella BalUn at the top. You can tell when the transmitting antenna is sw Compared with a W3EDP 85 ft end fed inverted L and 40m half-wave dipole signals were generally down 1-3 S points. 120. 6 length, I found a 100 meter roll of 6 core telephone wire and chopped 15 meters off it. 25 2 Cable clamps 1/4 inch $1. Those were the two bands I operated on with the 43 ft Vertical almost exclusively. In comparing an 85 ft end fed at 30 ft. 72m 88 ft and 44 ft are popular lengths. 19a, this textile antenna is flexible on both concave and convex surfaces, making it promising for wearable communications. I am going to talk about two different antenna systems that will meet these goals – an Off-Center Fed (OCF) Dipole and a Vertical Dipole. dipoles because the antenna is about 1/2-wavelength at the lowest frequency of operation. 5 ] The W3EDP Antenna - A wire antenna feeded with an unsymmetrical feed and a 1:4 balun can be tuned from 6 to 80 meters band but can be noisier than a dipole and cause RF in the shack I came across the following antenna which covers the 80-10m bands with no traps and just one loading coil. 85 MHz Z = 76 -j2. 12m). 3 MHz 7. 19-Gauge Steel Setting up the Yaesu FT-817 and Signalink for data mode communication Data mode communication is a lot of fun due to its pleasant pace and QRP (low power) performance. The above graphic depicts the overall layout of the loop antenna consisting of 558 ft. It's an easy… I am using the "stock" HARES antenna. An antenna tuner or SWL “preselector” will considerably improve s/n ratio, particularly on indoor antennas. 20 foot hoa 6-20 meter no radial multiband foldover vertical antenna with unun view details; 27 foot hoa 10-40 meter no radial multiband foldover vertical antenna with unun view details; 33 foot 10-80 meter multiband foldover vertical antenna with unun view details; 43 foot 10-160 meter multiband foldover vertical antenna with unun view details Depending on your power levels and whether or not you’d like to build it, I think K6ARK’s ultralight trapped end-fed antenna is pretty cool. 2 MHz 20/12/2020 SOTA DX – VK1 to Europe Long Path Propagation 18/10/2020 The random wire antenna is probably one of the least expensive, easiest and cheapest HF antennas to use if you have a tuner and you want to get the "most" out of a length of "random" wire without having to pull out that calculator, doing the math, getting the center insulator built or bought, running the feedline, and all the rest that goes with putting up a more elaborate antenna. 47wl / 0. 72 MHz. 4m) VHF Marine Band 6dB End-fed with matching stub A new standard of excellence in an economical antenna! Shakespeare brings you the best of the high-end features in an 8ft antenna with a brass element and a smooth, high gloss, polyurethane finish that won’t turn yellow in the sun. 5 278. 8 inch double Rayon $5. phase shift), we see a single lobe develop. antennas, antenna support structures (towers and masts) and the wiring and cabling that are used to connect them to radio equipment (figure 1). 4. For portable radio operation, I like End-Fed Half-Wavelength Antennas (EFHWA, pronounced “EF-WAH”). 2MHz A delta loop fed from the bottom or top is horizontally polarized and can be vertically polarized by feeding it from a corner at the base. Fig 3: The Windom Antenna This antenna is basically a random wire but with the lead-in mounted away from the end closest to the receiver some 36% of the overall length of the wire. Bullet Antenna Products Bullet™ and Super-Bullet™ Baluns and Ununs are 500/1500 watts PEP rated, purpose designed for portable and stealth installations for all antenna types. 51 metres), with a 40 ft (12. 0 Normal 0 21 false false false EN-GB JA X-NONE 49:1 Unun This is a unun ( unbalanced to unbalanced ) transmission line transformer designed to match 2450Ω to 50Ω . The antenna is pulled into the air with the antenna support rope. The ULTIMAX DXTREME end-fed antenna covers from 1. The stinger folds along the four-foot mast for storage. This kind of antenna wire seems to be hard to find in this part of Florida (Cocoa). 8:1, followed by the 40 m wires then the 80 m wires. Discover (and save!) your own Pins on Pinterest The outer end of each radial wire, sloping down from the top of the antenna, is connected by an insulator to a supporting rope or (usually) insulated cable anchored to the ground; the radial wires can also support the mast as guy wires. a EFHW), antenna impedance is in the 2000-4000 ohms range. The #680 HQ Coil is 6-3/8 inches in diameter and 7 inches The Matching Section is 450 Ohm Open Wire Feedline and is a compromise impedance between the 5/8 Wave antenna elements and the feed point, A 4:1 Current Balun. 00 Construction notes: The BalunDesigns 4:1 current balun is suspended by an 8-inch stainless steel eye hook. EST (770) 614-7443 Phone (678) 731-7681 Fax E-Mail 312 Swanson Drive Suite B Lawrenceville, GA 30043 The automatic antenna coupler is designed for use with end-fed unbalanced antennas such as whips and long wires. of #16 "silky" stranded wire cut to one wavelength long on After some research on the Internet, I decided to build another antenna. Model # Frequency Gain/dBi Power Rating Boom Length Weight Lbs. Installing the antenna wire as an Inverted L can change the Wire Length Feet 1. Do not ground the counterpoise stud when using a counterpoise(s) or radial field. IMPORTANT: ANTENNA MATCHBOX SPECIFICATIONS: The ability of an antenna matchbox to match the antennas shown below. 6 The OCF or Off Center Fed Dipole antenna is much like a conventional dipole antenna in that the formula you use to calculate the length of it is the same. Add to cart. 85 postage. 1 END FED INVERTED “L” ANTENNA FOR 160 – 80 – 40 METRES. The far end hangs down. This is important. The antenna is actually a 3-band CL-OCFD antenna (160, 80 & 75 m) where the center loading moves the natural third harmonic to the lower end of the 80 m band, below the 75 m second harmonic. 00; Description: SPECS: Configuration - End Fed Power - 1500 Watts PEP rating Length - 24 feet Weight - 3. SWL Antenna for Portables Classic end fed long wire consists of 30' of #24 insulated antenna wire with Bayonett plug. 100 46ft 4in 14. One such antenna is the W3EDP end fed. 1 pF capacitors are located 25 feet out each side of the center. 0 MHz, 100W, 135 ft. Another vendor says to ADD 150 feet of RG-213 to your cable run. Figure 4: VSWR of the six-band CL-OCFD on 80 m and at a height of 16. The 85 ft wire tuned 10 - 160 meters. The End fed used the Z817 autotuner to find a match. Feedline Lengths: The feedline length is also an important part of a "friendly" antenna design. 68 to 3. The size is about 85 ft. I always felt end-fed antennas had low angle radiation, but at lower heights (3 ft off my roof for part of it), it would have a lot of high angle radiation. That is a couple of feet shorter than the classic DEZepp, but that also just happens to be all the distance I had between my supporting trees! Two 9. Some might say that vertical antennas should be on this list as well but I find them to be more complex to install properly and therefore are not, in my estimation, the best first antenna for a new HF operator. without radials and has a verry low swr combined with a low noise level. 95 Saturn Fan Dipoles $159. Many antenna Elmers note that the DX performance is better on a Delta with vertical polarization but the top feed has not kept me away from plenty of great DX contacts all over the world during a time when The Half-Square Antenna A simple modification to a dipole would be to add two λ/4 vertical wires, one at each end, as shown in Fig 2 . It includes an aluminum case and internal LED SWR indicator. The W3EDP/Z-11 antenna system is a viable all-band antenna system. 4 10 82. More options for deployment under a picnic shelter r oof. The one end of the antenna was at 25-30 feet at the fed end, 20 feet on the far end. 3 dB gain over a dipole. Thus, the antenna geometry has two most important considerations: 1. Maximum power input 50 watts. I wasn't sure what type of antenna I wanted so I spent $85 for the 120 ft end fed long wire so I could just get on the air. An end-fed half-wave antenna looks like a "dream" antenna for HF. 2 m or 7 ft for the 80m end-fed. 40 to 41 meters - 132 to 135 ft. An end fed for your situation will be a rather poor choice. Cebik, W4RNL. 9 288. One end goes straight into the rig, often with no feedline, and the other end in the air attached to something as high as you can find. λ = 234 / F MHz (Feet) or 1/4 . It consists of a 1/4"diameter L-shaped rod mounted on a small aluminum box containing a receptacle for coupling to a 52 ohm coaxial transmission line. 85 This means that a dipole fed I re-used some zip wire from my antenna components junk pile. 1: Half-wave dipole lengths. Get the wire up as high as you can. I would recommend the Five Star 2808 indoor antenna. 35m wire with a 80m 40. Insulators can be fancy commercial glass or plastic ones, or simple A meandered flare dipole antenna was designed to operate at a 600 MHz ultra-high frequency (UHF) band. This shop provides you with all the required components. A LOCAL TV ANTENNA WILL PAY FOR IT SELF IN 3 MONTHS. 5 to 28 ft high •Hang a dipole or end fed L or random length From this article one may build a 40, 30, 20m end fed half wave antenna, with no special parts needed, or no special skills required. long thick wall water pipes for the center mast filled with wood 17 – Delta Fed Dipole Antenna. high will yield good performance. 85 MHz. ASSUMPTION: THE MATCHBOX CAN MATCH IMPEDANCES. The W3EDP 85 ft end-fed antenna - An 85ft wire fed against a 17ft counterpoise that works well in 80 and 40 meters [ Hits: 1890 | Votes: 2 | Rating: 9. A particularly convenient length of open-wire feeder is 25. Monitor Doublet EARCHI antenna Elecraft KX2 End fed antenna FLDIGI FT8 Heathkit SB-200 Hustler 4BTV IC-7100 ICOM 718 K9AY antenna LDG YT-100 LNR EF-Quad Lymphoma Mirrorless Mobile HF NPOTA Oak Hills Research OHR WM-2 Omni Omni antenna Par Electronics Porta-Paddle Portable operation QRP RigExpert Rockmite RSP1A SDRPlay Signalink Tarheel Antenna FS: MFJ Antenna Tuners Two small MFJ antenna tuners, both in excellent condition, shy of a few tiny hairline scratches on the cases. The resulting resonance frequency was about 85 kHz too high. Observe how feed-line loss changes between low impedance coax and high impedance open-wire lines of the same length, especially at higher frequencies. Length, Stainless Steel Hardware, Each Estimated Ship Date What are the directional options for an end fed antenna? The directional options for an end fed antenna include: Single direction - This type of antenna has the least amount of resistance and the longest distance capture for signals in a specific direction. A view of the trusty FT-817 in the mobile feeding the PackTenna 9:1 balun This is a great antenna system and I urge you to check out their website www. An UNUN looks simple to construct but it is not easy to achieve wide band performance. The next antenna, and usually it is the first choice to erect, is the 40 meter Off Center Fed antenna, "model OCF40Q". For a number of years I just used a circuit that I threw together with large components that I had in my junk box. Your TV will automatically rescan the available signals. In the mean time, I'll keep thinking about doing a SOTA activation! End Fed Half Wave Antenna, 40/20/10 meters, Trail-Friendly, 25W CW/SSB, 41 ft. Half the length of the top plus one leg of the feeder equals 85 feet, taking into account the velocity factor of the feeder, which should be parallel feed, such as 300 ohm ribbon or open wire. Wire Antenna Pulley System. 34 to 35 meters - 111 to 115 ft. The vertical section should be as high as possible, with the remainder of the antenna run horizontally to a support, such as a tree or a mast. to a 41 ft 40m vertical dipole, the vertical is the winner hands down. The tuning process is the same as for the 40/80 dipole, excpet the 20 m wires are trimmed first to an SWR of 1. Antenna impedance – Theory and practice examples; Antenna Wire; Antenna radiation pattern depending on length and height; End-fed antennas, a critical view; Common mode filters; Feed line The autotuner (an LDG YT-1200) gets the end-fed antenna in resonance between 7 and 30 MHz. Our SOTA tuner is an Endfed Half Wave Antenna Tuner covering the 40-15 meter bands. Frequency (MHz) Total length (ft in) (metres) 7. A height of 120 feet or more is required for long haul work. The J-Pole makes a great base station and emcomm emergency communications amateur radio and scanner antenna. Many people find that the G5RV antenna design functions well as an all band antenna if you use a End-Fed Horizontal Wires(EFHW) cover multiple bands with-out traps, stubs, or resonators. This is the antenna for you guys who want to get on HF effectively, and haven’t too much space or cash to throw around. This is a half-square antenna. Extension To make it a multi band (10/20/40/80m) antenna when little space is available: PLUS *instantly customizable* antenna patterns! PLUS up to 9x extreme weather durability. Groundplane Verticals (they are generally end-fed 1/4 wave radiators) Verticals and baluns . It can be viewed as an 85 Ft. 3:1) on 80m and 40m, and below 3:1 on 20, 15 and 10m. The End Fed Half Wave antenna described is a very good choice for those operators who have limited space and require an effective radiator. 2 wavelengths, it will work well at any height between 30 and 90 ft. 6. 20 862 + See All Winegard 5 ft. 5 273. ANY antenna works better if you raise it higher, up to about half wavelength above ground. Hang it up in a hotel window or string it up in the attic. I have been a Ham Radio operator for 40 years now. Our motto: “ Treat others exactly the way that you want to be treated. The effect of antenna input impedance is on feedline SWR, feed-line, and tuner loss. 30 Watts QRP, 80-10 Meters, 132 feet. G5RV Multi-Band Dipoles - Half Wave End Feds Wire Antennas, non resonant End Feds Marconi g7fek , ZS6BKW, ZS6BKW Junior are a few of the antennas we produce for the amateur radio operator DXer. Shop The Antenna Farm today, the best source for VHF and UHF, 700/800MHz radio supplies. The Hy Power OCF80 80 meter version shows a positive SWR dip on the following bands: 6, 10, 12, 17, 20, 40 and 80 meters. This antenna ia a quarter-wave base fed inverted L-type designed to operate in the UHF band. 0 Inches for one side. 95 (fully assembled) (includes RF choke, 50 ft. 624 m long) which goes up some 25 feet (7-8 m), then over horizontally, at an average of 25 feet (7-8 m) above ground, to a tree at the far end of my property. February 19, 2015 TVARC Antenna Guide for The Villages 7 Read every book on antennas or use Villages Antenna Guide to narrow the list “Villages Antenna Guide” is your shopping list Antenna On Air Stealth Tuner Install Cost 6M 10M 12M 15M 17M 20M 30M 40M 80M 160M Flagpole B A Remote D F C B B B B A A C D D Screwdriver B B None C D B B B B B The short end was placed at about 40 feet off the ground, tied to a tree limb, using about 10 feet of insulated rope. For example, an antenna made for 7. HALF WAVE END FED HWEF / ANTENNA / RADIO AMATEUR BLOG as an improvised trap for 80m and added some wire to get resonance on 1. Coax Braid 2. It is rated at 250 watts. As coaxial antenna cable transfers radio frequency (RF) power from one point to another, the power that enters it is degraded along the length of the RF cable, meaning less power reaches the To test the unit on the air, I made comparisons with an end fed Inverted V antenna which is a half wavelength long on 40 metres. 85 - Backpack J-Pole Antenna for 10m, 6m, 2m. It retains the high-strength in the antenna wire, allowing the antenna to help support the central mounting pole. The leg lengths are shown in the drawing at the top of this page. With this length of wire a coil of 11 turns is 40/20/10m End-fed Antenna (cont’d) • The balun is actually a 9:1 transformer – 3t primary and 27t secondary with common “earth” end. 5 in Magnet, NMO, 12 ft coax w/PL-259 for antennas 40 in or less Yaesu FT-897, FT-857D (In car), FT-817D & Wouxun KG-UVD1P BB6 W small end fed wire antenna by diamond. The larger the wire, the wider the bandwidth. Below are presented the results of EZNec modeling of a 45 ft long End/Base-Fed Inverted-L, 23 ft high and 22 ft across. 00 Folded Terminated Dipole (FTD) $318. These antennas have been popular for the Ft-817 and Mizuho QRP radio users. My inverted-V at 40 ft. and both ends at 20 ft. See schematic and photos. The EFHW Alpha J-Pole Jr end fed half wave HF antenna is only 34 feet in length. Band conditions were AWFUL, with a major solar flare hitting the ionosphere on April 6. feed line Balance 6-80 meter EFHW J-Pole Jr 34 foot end fed half wave HF antenna $ 199. 85 ft end fed antenna