End Fed Wire Antenna

The Shortwave Antenna Explained. Many hams don’t have room to install one. 25 feet of coax feeds into the 9:1, then a 53 foot wire antenna laying over furniture, on carpet, hanging down into first floor great room, etc. We continue our antenna offerings with this single band, 80m-10m end fed half wave wire antenna. 100 Watt, with solid tensile stools. Twin-Led Marconi Antenna. Also, an antenna tuner is required. FULL HF Coverage, no tuner needed on most frequencies. Assembling your antenna, and this where the fun comes into play. 132' Length. This is an End-Fed Half-Wave (EFHW*) antenna for 40/20/15 and 10m bands. 21 'Length of whole antenna SY L=4. Mon Apr 15, 2019 by gm_stack. • The G5RV was originally designed as a 3 /2 antenna for use on 20 meters. Technical Specs: Antenna Tuner; not Required. Orientation was roughly north/south. Mine runs from the top of my porch - 10 ft above ground - sloping up into a neighboring tree. 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. Even with large line/load mismatches, like 10:1 or 15:1, the additional mismatched line loss is very low. End Fed 80 - 6 meters HF Multi Band Antenna 600 watts unun continuious. While dipoles are very efficient antennas, they are not the only way to go. Some books say that you don’t use the counterpoise at all on 10m. Kite and Balloon Lifted Antennas from G4VGO K6STI Receiving Loop — "the DX secret weapon" L. Before I added 80 meter, I operated that band with a end-fed wire antenna. 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. That is an end-fed, but very different then the half wave construction. This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. FULL HF Coverage, no tuner needed on most frequencies. For a resonant EFHW use a 49:1 and for a non resonant use a 9:1. Tokyo Ham Fair and Huntsville Hamfest- Kenwood TH-D74 Released D-Star Radio. The Classic Numbers for All Types of Wire Antennas at HF. wire antenna really shines. It is a resonant Half wave on 80m (3. 137 - Wire Beam 6dBd-Gain for 10m. The problem with a lot of portable antennas and antennas in confined spaces is the low efficiency of those antennas. 40m, fed buy a separate coax. Frequency Coverage: 10-40 Meters / 10-80 Meters. The original design has a 27/3 turn ratio ( 1: 81 ) on a small 43. AA5TB has you connect a 4. , 10-80m, 132 ft. 1982hp, end fed horizontal wire ant. Long Wire Antenna 1:9 Balun for 3-50 MHz (by F4HWK): Here i present the fabrication steps for a long wire balun having a transformation ratio of 1:9. Results depend on the height of the wire above ground. Model 4132 - 4:1 Unun for Multiband Verticals and Random Wires, 2kW. 95 Shipping/Packing for USA shipments via Priority Mail. An 84 ft long end-fed antenna wire, with a "counterpoise" wire of 1/5 the length of that antenna wire (i. We have designed a range of half wave end fed wire antennas. If possible a symmetrical antenna like a center fed dipole, either horizontal or vertical, or a center fed symmetrical random wire using good twin lead or ladder line, will decrease the. They are 2, 6, 10, 20, and 40 meters. Antenna modeling shows that a resonant half wave wire can be fed at any point (End, Off-Center, Center) without changing gain or efficiency only impedance. The antenna came into my 2nd-floor room window where I fed it via a tunable LC network, tuning the L and C to match 50 ohms into the. These End fed antennas are unique, as they are resonant on 8 bands and DO NOT require a tuner to operate. It is about as basic as it gets and it can work quite well on any HF band. I've built a 2 meter ground plane antenna that works pretty well for RX and has a decent SWR on 2 meters with my Alinco. 45' x 30" UHF Connector. Mounted in this fashion, the end fed half wave makes an excellent NVIS (Near Vertical Incedent Skywave) antenna that gives good coverage out to around 300 miles on the low bands 30 thru 80 meters. 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. This antenna is usually fed 1/3 from the end, in other words its a 1/3 wire lenght, feed point, followed by 2/3 lenght of wire. 0 ‘Length from start to coil SY Lcoil=0. MFJ-1984HP EndFed 1/2 Wave 800W 40M-10M Wire Antenna 66 feet. I discovered antenna computer modeling as an alternative to the cut-n-try methods. 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. Amateur radio websites and YouTube channels are full of chatter about random-length wire antennas fed with a 9:1 impedance dropping transformer (aka 'unun'). 2 MHz would have a total length of 65 feet. I've built a 2 meter ground plane antenna that works pretty well for RX and has a decent SWR on 2 meters with my Alinco. 000 mhz to 30. Portable Multi-band/ Half-wave 49:1 matching transformer, ready built with all fittings, just add the antenna wire. This may be a Zepp (end-fed) or a dipole (center-fed). The end fed halfwave connects mechanicaly to the UNUN as follow: Phising pole. That is the reason you need to pick the length of the wire carefully, making sure you won't hit the voltage point on any of the bands you want to use. They are 2, 6, 10, 20, and 40 meters. The following tables show the recommended lengths to use for antenna wire based on the bands you wish to cover. Very convenient and simple. I have not yet tried it with an end-fed antenna. ó , kdyh kdg \rxu pxowledqg hqg ihg dqwhqqd lqvwdoohg khuh lq 6lqjdsruh iru d ihz zhhnv qrz dqg dp yhu\ sohdvhg , xvhg wkh zluh iurp p\ suhylrxv dqwhqqd zklfk lv ihhw orqj ,w zrunv ehdxwlixoo\ , kdyh lw. LOW SWR is, and make the wire becoming a bit shorter until the LOW SWR is where you want it (for 140-43) is approximately 14:15 a 14. With end fed antennas, the coax is meant to radiate as part of the antenna system (serving as the “ground” or counterpoise) and therefore you need to use a Feed line Choke (BOX “FC” above) to suppress the common mode current on the outside of the coax feed line so it does not enter the radio and cause garbled communication. -V) at the feedpoint. wire antenna really shines. As designed, the matchbox can handle up to 150 watts PEP. END FED DIPOLE 80-6 meter Portable HF Antenna Matchbox System. This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. I started by pounding a 8 foot ground rod into damp earth at a strategic spot about 5 feet from the base of a tree in my back yard. The Par Electronics EF-SWL is an end-fed short wave antenna optimally designed for 1-30 MHz reception. This will place the feed point of the antenna 45 feet in from one end. I have built the matching unit. CM End fed multi-band using a single coil to adjust resonance CM CE SY L1=2. This is an End-Fed Half-Wave (EFHW*) antenna for 40/20/15 and 10m bands. While dipoles are very efficient antennas, they are not the only way to go. 4 payment is due within 72 hours of offer end. The most simple is a 75 meter dipole fed with open wire or ladder line, tuned up on 160 meters, as shown in Figure 1. The EFHWA needs a ground connection, but it does not need to be very extensive. it starts firing off the ends as well as broadside. Figure 1 - Basic 75 Meter Dipole For best results on 160 meters, the tuner must be low loss. The antenna is sported by a 22ft (6. Onn 7 MHz, it is an end-fed half-wave with a horizontal mid-point for high angle close-in contacts. There is no counterpoise needed per the instructions for the antenna. J-pole Antenna Because the J-pole and Zepp are electrically identical in function, and are similar to all other end-fed antennas in problems, pages on J-poles, Zepps, and end-fed verticals overlap. 30 Watts QRP, 80-10 Meters, 132 feet. Shortwave End Fed Wire Antenna w/ Balun. Alle antennes zijn gemaakt van materialen van zeer hoge kwaliteit en de beste in zijn klasse op het gebied van mechanische constructie en elektrische prestaties. 03 ‘Length of coil SY L2=39. 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. 8 cm) apart. It is about as basic as it gets and it can work quite well on any HF band. It is operated as an inverted "V" Antenna and has a power rating of 1kw CW (4kw PEP) The antenna has its feed-point conveniently located at ground level at one end of the antenna. It would normally be on half wavelength long on the lowast band you wish to use it on. All SAL Electronics' HF wire antennas are designed with a low noise direct DC ground transformer. That is an end fed quarter wavelength piece of wire run. We are running a reduced service due to the covid 19 pandemic , stop at home, stay safe. Latin America Probably doesn’t need listening antenna. One vertical element ( 1/4 wave ) is fed at the top where it is attached to an SO 239. Cut the wire exactly in the middle, and attach one piece to each end insulator, just twisting it back on itself for the initial check. Design of an end-fed HF antenna I haven't done much with HF over the years, but want to put up an antenna out the back of my place for HF. It incorporates a 9:1 UNUN at the feedpoint enabling it to be fed directly with 50 Ohm coaxial cable. 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. 45' x 30" UHF Connector. This antenna is usually fed 1/3 from the end, in other words its a 1/3 wire lenght, feed point, followed by 2/3 lenght of wire. Distance from center of antenna to the center of the coil in feet (Must be less than half the total antenna length given above) Enter a distance between 0 and 250 feet that is less than half the total antenna length. You can put this antenna up almost anywhere, in almost any configu-ration and get on the air right away. Whether you’re QRP backpack, vacationing, emcomm station, or an antenna neighbors will never see, MFJs got an EFHW for you: MFJ -1982LP, $49. The problem with an end fed half wave antenna is that the antenna presents a high impedance, creating a. Such an antenna requires a special coupling network to properly couple my 50 ohm coax to the antenna's high impedance (~2500 ohms). The feeding point of a multiband End Fed antenna is practically a wide band impedance transformer. Resources listed under End-Fed Antenna category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. The right picture shows that same end insulator from the other side and gives a good idea how low this antenna really is. Both can be used on multiple bands though the random length one may have a slight advantage there if you. End-Fed Half-Wave Antennas. The most common is the quarter wave Inverted-L. Instantly improves the reception of your compact portable shortwave radio. 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. End-fed wire antennas. 8 cm) apart. The 7-Band antennas need at least 120 feet of ground space end-to-end. If only 80m and 40m were considered, the idea is to make an antenna half way between 20m (¼ of 80m) and 10m (¼ of 40) ie. This antenna is usually fed 1/3 from the end, in other words its a 1/3 wire lenght, feed point, followed by 2/3 lenght of wire. Before I added 80 meter, I operated that band with a end-fed wire antenna. One such antenna is the W3EDP end fed. I used a 2' long wire braid and a 1' long stake in the ground to create about 3' (1m) of return ("counterpoise"). Manufacturers of High Quality HF END FED Wire Antennas De trendsetters van de eindgevoede antennes sinds 2006. Why wire? "Skyhooks" made with wire are relatively inexpensive compared to 40-meter dipole fed with 80-meter energy has a low radiation resistance but very high reactance. 5 mm copper wire with black plastic jacket. 468 ÷ freq (mHz) = Length (feet). But for everyone else, YMMV. In the end I decided to use a 57m (due to the position of supporting structures) long doublet fed with 450 ohm ladder line and connected to an auto-atu at the base of the antenna. 00 mhz Made 1. EFHW-4010 Multiband End Fed Half Wave Antenna - 63ft (19. It is a resonant Half wave on 40m (7MHz) therefore also resonant on second, third and fourth harmonics, 20m (14MHz), 15m (21MHz) and 10m (28MHz). of twin-lead wire with one of its wires soldered to 33. However, I figured that with my Elecraft KX1 and KX3 QRP radios both having good internal ATUs, that they have no requirement for a 9:1 impedance drop. Frequency Coverage: 10-40 Meters / 10-80 Meters. The heart of the multiband (you could as well call it “anyband”) end-fed is a 1:50 (to 1:60) impedance transformer that feeds half a wave of wire fed at the end (or beginning) where impedance is (very) high (aroun 3k Ohms). No ground plane or counterpoise is needed. 95 Shipping/Packing for USA shipments via Priority Mail. This article will not address that antenna type. Paypal Only. So do all antennas, but not at the design frequency - there, at the design frequency, the terminal impedance is quite predictable. 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. 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. These antennas can be mounted horizontally, vertically or as a sloper. 160m-10m broad band element fed by a third coax. I've built a 2 meter ground plane antenna that works pretty well for RX and has a decent SWR on 2 meters with my Alinco. 300 watts New style resonant end fed antenna requires no counterpoise. I did 24 hour WSPR runs using 5 watts of power with each antenna on successive days. The 9:1 unun was easy to construct using the included directions. An End Fed Halfwave Antenna for Portable Ops I’m a very casual operator, and an even more casual portable operator. 45' x 30" UHF Connector. Log Periodic Antenna Calculator Long Wire Antenna Long Wire Impedance matching Loop-Yagi's — from PA5RWE Loop Antenna, Magnetic, Portable — from G4FON Low Band Antennas-- from. 9:1 Baluns are useful between 450 ohm balanced lines for center fed Zepps and G5RV antennas where the impedance at the end of the feedline is 450 ohms (1/2 wavelength feedline), or high impedance feeds for log periodic beams. - End-Fed antennas have wild impedance swings. The W3EDP 85-ft end-fed This is one of my favourite, cheap antennas. W4ZCB is situated on a small mountain in North Carolina. 95 Shipping/Packing for USA shipments via Priority Mail. This is the basic principal behind most commercial vertical antennas, that often become the solution to the SPACE problem for a reasonable antenna on 80 meters. (unun covers 160 to 10 meter) with black array. On the higher bands 20 meters and up it will do a fair job at longer distance. The first time I remember messing about with antennas was in 1947 when I ran a very long wire from our house, across the street, to a tree. mfj mfj-1982hp end fed horizontal wire antenna, 1/2 wave, 80-10m, 800w End-Fed Horizontal Wires (EFHW) cover multiple bands with-out traps, stubs, or resonators End-fed radiators have the unique quality of resonating on the 1/2-wave fundamental frequency plus odd/even harmonics above!. 32, “An Unorthodox Antenna”) is an 84′ long end fed and a 17′ long counterpoise (6. The smaller EF-4010 End-fed antenna is ideal for portable or attic installations between 40 and 10 meters, plus it makes for a great all band SDR receiving antenna from 0. Shop our selection of Alpha Delta wire antennas, including multi-band sloper antennas for limited-space applications and SWL antennas for superior performance through 30 MHz. 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. End-fed wires resonate on their 1/2-wave fundamental frequency plus all odd and even harmonics above. The OCF80 use the "GU4-HF-5KW-A" Guanella 4 to 1 Current Balun (supplied) which is rated at 5000 watts. When fed off-center at an appropriate location (typically the 1/3 point) and fed with a 4:1 balun, the dipole becomes a solid multi-band antenna. Notice how the feedpoint is not quite as high impedance as the top of the antenna. 40-6m 250w £39 99 END FED antenna 80-6m 250w £42 99 End fed resonant 40-20-15-10 no atu 800w £65 99 shortwave. MFJ-1982LP END FED, HORIZONTAL WIRE ANTENNA : Note: This listing is for one MFJ-1982LP. 132 - Double Bobtail Antenna for 20m. ó , kdyh kdg \rxu pxowledqg hqg ihg dqwhqqd lqvwdoohg khuh lq 6lqjdsruh iru d ihz zhhnv qrz dqg dp yhu\ sohdvhg , xvhg wkh zluh iurp p\ suhylrxv dqwhqqd zklfk lv ihhw orqj ,w zrunv ehdxwlixoo\ , kdyh lw. It incorporates the N7VE led SWR indicator and has a board mounted female BNC for connection to. You should probably use ring terminal connectors of approximately 6mm to terminate and connect each leg of a dipole at the centre point, but soldered/tinned loops in the end of the wires will do. INTRODUCING THE. If you want a very good wire antenna for 40m/80m then this is the one to get. Counter to tuning a length of wire like you would with a dipole, with a random wire you don't. In the case of the end fed random wire, some lengths are better than others because of the har-monic effect of the length of the wire and how that effects the various bands on which you wish to operate. Other EFHW antenna designs by VK SOTA activators: Glenn VK3YY; Garry VK2GAZ; Reference site: Steve Yates AA5TB The End Fed Half Wave Antenna. This link is listed in our web site directory since Monday Jan 23 2006, and till today "How to make an end-fed antenna work" has been followed for a total of 42614 times. 95 Shipping/Packing for USA shipments via Priority Mail. endfed antenna This end fed type of antenna was marketted in the UK and is a useful system for the portable set-up. 45 - Bisquare Loop Antenna. 5 mm copper wire with black plastic jacket. EFwire antennas are also great portable multiband antennas that can easily be deployed using trees, glass fibre masts, flag poles. End-Fed 2x14 turns UnUn transformer (1:49) End-Fed 3x24 turns UnUn transformer (1:64). Unsurprisingly, both are the same length. The W3EDP 85-ft end-fed This is one of my favourite, cheap antennas. , 84 / 5 ≈ 17 ft). The 9:1 UNUN also removes static noise and provides a DC path to earth. 950MHz with an SWR of 1. In the case of the end fed random wire, some lengths are better than others because of the har-monic effect of the length of the wire and how that effects the various bands on which you wish to operate. It is operated as an inverted "V" Antenna and has a power rating of 1kw CW (4kw PEP) The antenna has its feed-point conveniently located at ground level at one end of the antenna. In my case for me to work 40/80 meters I had to increase length to around 67' otherwise this antennas was numb to the lower 2 bans. Volunteers of the Honolulu Emergency Amateur Radio Club (EARC) carefully assemble the 6-40 End Fed matchbox antennas for those who prefer not to build one. 100 Watt, with solid tensile stools. The end fed long wire project. EFwire, end fed multiband wire antennas require less space than center fed dipoles. The basic formula for determining the length of a center fed, half-wave wire Dipole or Inverted Vee antenna is:. 00 mhz Made 1. Being a half wave, no radials or counterpose wires are needed. For those of us wanting to get moving quickly on this will notice that Mike wrote that a standard recommendation (see QST, March 1936, p. Problems With End Fed Half Wave Antennas •#1 Problem: Common mode currents on feedline •RF in shack •High noise levels on receive •Feedline and grounding can affect SWR and tuning •Isolating the feedling from the antenna can be difficult, even with a common mode choke •High voltages, even at low power •FCC RF exposure limits can be exceeded at low power levels. The magic lengths to use with the End Fed longwire is 29, 35. As an example, a 28-31 foot wire will typically allow 40 thru 10 meter coverage and a 43-50 foot wire will provide access to 80 thru 10 meters. ; Easy Storage/transport. , 10-80m, 132 ft. 45' x 30" UHF Connector. When used as a sloper, the favoured direction can be altered by moving the sloping wire at the lower end. Post navigation. However, when. If you only have one support an end-fed antenna may suit you better. Configuration: End-fed configurable as Sloped or Horizontal Frequency Coverage: 3. This article will initially concentrate on the half wavelength of wire and its use as an effective multiband antenna. Questions;. EFwire antennas are also great portable multiband antennas that can easily be deployed using trees, glass fibre masts, flag poles. Specially made for the portable user comes complete fixed with winder to unun to store away with ease while on the move. Build instruction impedance transformer for End Fed antenna’s. 66) end support. This all-aluminum gutter is fed with coax with an unterminated shield (at this end, shield connected to radio ground at the other) to reduce nearby computer hash from inside the house. 9:1 Ununs are useful between coax and long wires with load impedances near 450 ohms. Post by HomerBB » 12 Jan 2013, 18:40 You guys know more about this than I do, but I can't help but thinking that the same wire in the diagram could be lengthened by some small amounts simply by pulling it off a direct straight line and end up with something that looks like a part of a hexagon. L1 = 30 uH, 35 turns of 2. MFJ-1982LP END FED, HORIZONTAL WIRE ANTENNA : Note: This listing is for one MFJ-1982LP. The end fed half wave antenna appears in many professional and amateur radio textbooks and the design of. 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. The Magic Numbers are lengths that seem to work very well for them. MFJ-1982HP END FED, 1/2 WAVE, 80-10M, 800W, WIRE ANTENNA. 0:1 on the 11 meters band it was built for. Mine runs from the top of my porch - 10 ft above ground - sloping up into a neighboring tree. WIRE LENGTH IS APPROXIMATELY 50 FEET! YES, ONLY 50 FEET! END FED "RANDOM WIRE" FOR 80-10 METERS WITH BUILT IN RADIO TUNER BUT MANY BUILT IN RADIO TUNERS WILL TUNE THIS ANTENNA PERFECTLY ON 80-6 METERS!! Made in the USA by a (((TAX PAYING))) HAM for Hams. The second piece would be 108 feet. 7 WL at 7 MHz which is less. 21 ‘Length of whole antenna SY L=4. As designed, the matchbox can handle up to 150 watts PEP. 5 mm copper wire with black plastic jacket. HF Antennas. The antenna has a full 300kHz bandwidth on 80m between 3:1 SWR points. The longer the total wire the better. A single heavy conductor extends the ground connection up to the. An End-Fed 40m-6m Short Wire Antenna or a "Shorty for Forty and Up" That is the entire antenna. In the case of the end fed random wire, some lengths are better than others because of the har-monic effect of the length of the wire and how that effects the various bands on which you wish to operate. Check out the video to learn more. The problem with an end fed half wave antenna is that the antenna presents a high impedance, creating a significant miss match with the usual transceiver. 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. This antenna does require a tuner, but the tradeoff is that it's often easy to construct. No need for a tower, rotor, and beam to get DX. 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. The smaller EF-4010 End-fed antenna is ideal for portable or attic installations between 40 and 10 meters, plus it makes for a great all band SDR receiving antenna from 0. In my last post I talked about using a high impedance end fed matching transformer connected directly to an aluminum chalk line reel capacitively coupling to the wire that is used to create a variety of field deployable antenna shapes without a tuner. End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. 45' x 30" UHF Connector. The W1SFR End Fed Antenna is 35′ long and made with 18 ga Davis RF “PolyStealth” antenna wire, or Wireman “silky” 18ga. I believe it could be used to tune for other bands as well. They use some kind of matching network to trasnsform the very high impedance at the end of a half-wave wire to about 50 Ω. 5MHz) therefore also resonant on second, third, and fourth harmonics, etc. Skip to the beginning of the images gallery. All these mechanisms replace the missing part of antennas like the end fed random length wire and the quarter wave vertical or the end fed half wave wire. You need black wire ties because they are UV resistant, and they will cost you just a few dollars at a hamfest, flea market or hardware store. When an end-fed antenna is desirable or when a center-fed antenna is not possible or convenient, these hang and playTM end-fed Zepp antennas provide excellent no-compromise performance. The intent of this unun is to allow full HF coverage for portable applications or in restricted installations such as HOA managed communities. I will continue to test the KE4PT antenna. End Fed Half Wave (6. View this page with the Paypal order forms. The other end connects to the random-wire connector on a suitable antenna tuner. End Fed 80 - 10 meters HF Multi Band Antenna 300 watts unun continuious. Of course, I calculate basic stuff, length etc. AA5TB has you connect a 4. However, when using it with an End-Fed. A random wire is exactly that—a piece of wire that's as long as you can possibly make it. A simple wire dipole is normally center-fed. No long counterpoise, radials or feedline required. DX Engineering is your #1 source for wire antennas. Multiband end fed antennas 3. First, find some. The end fed antenna is essentially half a dipole, it uses a good earth connection to complete the arangment. An exact multiple of a half wave length from the reflection point (end of the wire) to the radio, means the SWR will be so high as to be almost impossible to tune. These are sometimes known as a Magnetic Longwire Balun. Shortwave […]. 000 mhz to 30. Configuration: End-fed configurable as Sloped or Horizontal Frequency Coverage: 3. Notice how the feedpoint is not quite as high impedance as the top of the antenna. That is why balanced wire tuner outputs or end fed wire tuners have long ceramic insulators on the output terminals and don't use coax. LNR is pleased to announce that the PAR EndfedZ line of wire antennas has been acquired by Vibroplex. The half wave end fed antenna is simply a half wavelength wire fed at the end rather than the center like the half wave dipole. Whether you`re QRPbackpack, vacationing, emcomm station, or an antenna neighbors will never see, MFJs got an EFHW for you:. 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. It was originally used on Zeppelin airships in World War 1 as a trailing wire lowered from the airship while in flight. L1 = 30 uH, 35 turns of 2. We are feeding a half wave wire antenna (efhw) at the end due a low loss matching network. Resources listed under End-Fed Antenna category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. Whether you`re QRP backpacking, vacationing, running a emcomm station, or need an antenna neighbors will never see, MFJs got an EFHW for you: MFJ-1982LP, $59. 5MHz) therefore also resonant on second, third, and fourth harmonics, etc. I set it up today as a horizontal at about 12 feet above the ground in my back yard. 2 MHz for the FT 240-43 this will be 14. Tue Apr 16, 2019 by gm_stack Previously we covered building an end-fed random wire antenna. 39 - Terminated Sloper Antenna. The End Fed antenna is very popular especially for field work. In short, the Mystery antenna is a sky wire that incorporates the advantages of a 3 element collinear and the G5RV antenna. All these mechanisms replace the missing part of antennas like the end fed random length wire and the quarter wave vertical or the end fed half wave wire. Stretch out the two 22 foot wires and tie off the strings to suitable supports. End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. 000 mhz to 30. The measures used were exactly one half of those used for the W3EDP: 8. Here is a sure fire way to make end fed half wave antennas fed with a 50 ohm coupler work - without long radials, elaborate grounds, chokes, voodoo, etc. 95 Shipping/Packing for USA shipments via Priority Mail. Add to Wish List. The Half Square antenna is a great wire antenna for the DX edge. Mine runs from the top of my porch - 10 ft above ground - sloping up into a neighboring tree. End-Fed Antenna projects and plans category is a curation of 62 web resources on , QRO End Fed Half Wave Antenna Coupler, N2CX on End-Fed Halfwave Antennas, Endfed wire antenna tuner by KC8AON. These antennas usually work better if they have an RF ground "plane. Contacts made with the end fed random wire using the EARCHI matchbox are all with 50 watts and the KX3/KXPA100 are G0ORH, KR5N, MI0AHH, EA6NB, EA8/DL2DXA CO8LY on the WARC bands during the tests I conducted today. First Published: 14 August 2014 Last Update: 29 September 2017. Unfortunately end-fed antennas have also come back with a little. The current antenna design is like an end fed Zepp but with a 1/4 wave element in place of the Zepps ½ wave element. June 2018 - Updated January 2019. Wire antennas need to be made a bit long and cut to resonance. MFJ-1984HP come with 66 feet of wire and cover 40, 30, 20,15, and 10 meters. NOTE 1: This original N2CX article was first published in the 72 newsletter back in 1997 or 1998. It is a resonant Half wave on 80m (3. This material is very strong yet can easily be coiled like a rope for portable work. End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. W4ZCB is situated on a small mountain in North Carolina. As we know, the impedance of the dipole is around 70 Ohms (flat top) or 50 Ohms (Inv. Firstly the antenna is a longwire antenna, which means all the wire is stretched out in one direction from the feed point. Technical Specs: Antenna Tuner; not Required. The other 6 feet will be used to support the antenna at the ground ends, (gray closest to ground), and for jumpers. 90 Shipping , 30-Day Returns, eBay Money Back Guarantee Seller: hfedzantennas (1,776) 100% , Location: Gurabo, Puerto Rico , Ships to: US & many other countries, Item: 202591729404 Hi For sale here is an end fed antenna designed for 10m-160m. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. A very simple antenna to make, deploy and use is an end fed wire antenna. All these mechanisms replace the missing part of antennas like the end fed random length wire and the quarter wave vertical or the end fed half wave wire. Hams in general, and QRP'ers in particular, are always on a quest to find the "ultimate" antenna. A Short Antenna: In general, an antenna with each leg shorter than one-eighth wavelength, but in some cases shorter than one-quarter wavelength. The other end connects to the random-wire connector on a suitable antenna tuner. As long as the user has a conjugate match on the transmitter end of the line using an antenna matching network, virtually ALL power is radiated by the antenna. end fed antennas Time Owned: more than 12 months. 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. The antenna will be resonate at the Amateur bands specified for each model with very low to almost flat SWR. MFJ -1984MP, end fed horizontal weir antenna MFJ -1984MP fed, wire with 75' 100% Dacron polyester support rope note: this listing is for one 300 watts pep meters 66' length 75', included. - End-Fed antennas have wild impedance swings. Antenna tuner is needed on 20 and 17m and to extent the bandwidth on 10m. The Marvelous 10/20/40 Half-Wave End-Fed Antenna. I've built a 2 meter ground plane antenna that works pretty well for RX and has a decent SWR on 2 meters with my Alinco. 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. Orientation was roughly north/south. The longer the total wire the better. A Short Antenna: In general, an antenna with each leg shorter than one-eighth wavelength, but in some cases shorter than one-quarter wavelength. Half-wave dipoles are easy to install and erect and are not nearly as likely as end-fed. Below is one example of how to build an 80 metre band long wire antenna for a house with a smaller garden. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. The key to end fed antenna success is the matching network interface between the long wire antenna and the coax feed line and feed line choke at the transceiver. Assembling your antenna, and this where the fun comes into play. I have built the matching unit. As with any compromise antenna, there are significant problems related to SWR, antenna matching, and grounding. 000 mhz to 30. First Published: 14 August 2014 Last Update: 29 September 2017. END FED HALF WAVE ANTENNA; MTC sells Wire antennas from RadioWavz and MFJ. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. Most END FED antennas on the market require a tuner, this one does not require one to operate. (There is a variant by OH5RM for low angle on 10MHz - see pdf doc). it starts firing off the ends as well as broadside. Hi For sale here is an end fed antenna designed for 10m-160m. 00 mhz Made 1. dom-length dipole fed with an open-wire feed line. 2) can circum-vent the disadvantages of bringing the. 43 – Rhombic Inverted-Vee Antenna. End-fed antennas, or antennas with the single wire feeder brought into the shack, come with a little misconception. The horizontal section comprising of 57ft of wire will then make up the antenna. The wire itself consists of 168 strands of #36 gauge woven copper. An End-Fed antenna has been use for many, many years. (That dipole may be cut to length on a specific frequency or it may be "however long you can make it", but it's still a dipole, not an end-fed wire. You need black wire ties because they are UV resistant, and they will cost you just a few dollars at a hamfest, flea market or hardware store. The one exception is the Windom antenna which is just an offset dipole fed with a 4:1 balun which works very well. In the end I decided to use a 57m (due to the position of supporting structures) long doublet fed with 450 ohm ladder line and connected to an auto-atu at the base of the antenna. Par EndFedz® Wire Antennas Amateur Wire Antennas : The Vibroplex PAR EndFedz® are a full length half wave dipoles, but with an important difference. 03 'Length of coil SY L2=39. This project is really simple and most of it was made using stuff I found in my junk drawer. FULL HF Coverage, no tuner needed on most frequencies. The Magic Numbers are lengths that seem to work very well for them. Operate mostly psk. The resistor should be the value that is appropriate. Supplied end insulators make suspension easy. One end of the wire attaches to a tree, pole or other support, preferably at a high point. With this version of the antenna, interaction between elements and top resonance have been turned to our advantage allowing for excellent multi-band working, while maintaining a useful radiation pattern and efficiency on almost all Amateur Radio bands. It lies on the ground and is insulated from it (#14 insulated multi strand wire). The original design has a 27/3 turn ratio ( 1: 81 ) on a small 43. Tie a loop on each end of the two 22 foot wires. See this link for more info. I use and enjoy all modes but am primarily a CW operator and happy to have earned awards DXCC CW #12,029, WAS CW #52,955, and WAC CW, all earned with 100 W / dipole. 39 - Terminated Sloper Antenna. This antenna works quite well no issues. The antenna can be fed as a random wire on other bands. Being end fed the 2012/912 broadband portable antenna is quick and simple to install, requiring a mounting point such as a small pole or tree, the other end being attached to either a vehicle bull bar or the housing of a portable transceiver. The longer the total wire the better. This is the third antenna. 2MHz, ground mounted) SWR - Actual bandwidth on the 50Ω side of the coupler will be much narrower, due to the tuned circuit we are using. Diameter of the conductor in inches (14 gauge is. Being a half wave, no radials or counterpose wires are needed. This balun is simulated with LTSpice and measured with a VNA. The versatile end fed wire A piece of wire of almost any length can be used as an antenna on the HF bands. If you raise it high…. Attach the other end to the center insulator in the same way. 0 'Height of apex above ground SY PoleX=sqr((L2/2)^2. A simple wire dipole is normally center-fed. 45' x 30" UHF Connector. EFHW-4010 Multiband End Fed Half Wave Antenna – 63ft (19. Shop our selection of Alpha Delta wire antennas, including multi-band sloper antennas for limited-space applications and SWL antennas for superior performance through 30 MHz. ; Stainless Hardware, UV resistant materials throughout. General Description: End-Fed Horizontal Wire antennas (or EFHWs) cover multiple bands without traps, stubs, or resonators. The other side of the dipole is a quarter wave "floating" counterpoise for the inverted "L" vertical portion. It has been purposely reduced in length compared to a full sized 80m dipole by the insertion of a 70uH loading coil. Par EndFedz® Wire Antennas Amateur Wire Antennas : The Vibroplex PAR EndFedz® are a full length half wave dipoles, but with an important difference. Cut one piece of wire to 36 feet. End-fed wires resonate on their 1/2-wave fundamental frequency plus all odd and even harmonics above. The end result is a multiband antenna that has a long wire loop giving a lower takeoff angle than a dipole, which in turn gives a lower practical standpoint, the antenna should be fed with open wire (ladder) line and a suitable tuner with balanced outputs. Attach some ropes, and hoist the antenna in the air. One of my hombrew HF SOTA antenna options is a 27. Works with a 4:1 UNUN. That is an end fed quarter wavelength piece of wire run. 2 In order to have the least possible influence on the antenna, insulated lines are recommended for attachment to the insulators. The dipole was invented by Heinrich Hertz around 1886. Solid Core Wire (two colors, 24-gauge recommended). Whether you`re QRPbackpack, vacationing, emcomm station, or an antenna neighbors will never see, MFJs got an EFHW for you: MFJ-1982LP, $59. 90 Shipping , 30-Day Returns, eBay Money Back Guarantee Seller: hfedzantennas (1,776) 100% , Location: Gurabo, Puerto Rico , Ships to: US & many other countries, Item: 202591729404 Hi For sale here is an end fed antenna designed for 10m-160m. By adding a broad-band matching network, the wire’s high impedance feed point is transformed down to 50 ohms across a wide frequency range and, in most cases, you don’t need a tuner to operate. LNR is pleased to announce that the PAR EndfedZ line of wire antennas has been acquired by Vibroplex. For example, an antenna made for 7. Re: Homebrew 9:1 unun fed wire antennas. Portable Multi-band/ Half-wave 49:1 matching transformer, ready built with all fittings, just add the antenna wire. The frequency range of operation of V-antenna is around 3 to 30 MHz. The other side of the dipole is a quarter wave "floating" counterpoise for the inverted "L" vertical portion. 37 – Multi-Band Portable Antenna. The End-fed Half-wave (EFHW) The first relies on the fact that from the end of the antenna a length of wire on or two half-waves long looks very similar. Above is a diagram from the ARRL Antenna Handbook (Silver 2011). Log Periodic Antenna Calculator Long Wire Antenna Long Wire Impedance matching Loop-Yagi's — from PA5RWE Loop Antenna, Magnetic, Portable — from G4FON Low Band Antennas-- from. All these mechanisms replace the missing part of antennas like the end fed random length wire and the quarter wave vertical or the end fed half wave wire. 03 'Length of coil SY L2=39. The EFHW antenna is a popular choice among VK SOTA activators. Re: Homebrew 9:1 unun fed wire antennas. For each model the inductance and capacitance values of three alternative impedance matching networks are computed to match to a 50-ohm line. End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. Requires a balun Single wire feed line Very light, popular for QRP and backpacking Par Electronics End Fedz. 300 watts New style resonant end fed antenna requires no counterpoise. This move is a positive for both companies and we are excited about the future going forward. For a number of years I just used a circuit that I threw together with large components that I had in my junk box. Results depend on the height of the wire above ground. I started by pounding a 8 foot ground rod into damp earth at a strategic spot about 5 feet from the base of a tree in my back yard. Instantly improves the reception of your compact portable shortwave radio. The antenna is really just 2 wires, an 84' long wire and a 17' short wire. 160m-10m broad band element fed by a third coax. Shortwave End Fed Wire Antenna w/ Balun. So all 44m or wire is in one continuous piece. The antenna is fed about 23 feet in from one end of the antenna. I've built a 2 meter ground plane antenna that works pretty well for RX and has a decent SWR on 2 meters with my Alinco. The antenna wire is then typically take out of the radio room, or shack and taken to a horizontal section that runs above obstructions. There will be a certain amount of radiation. A number of radials, rods or plates terminate at a common point in the garden near the bottom of an outside wall. See this link for more info. Over this span of time, End-Fed users have come up with a group of Magic Numbers. 5 mm copper wire with black plastic jacket. Antenna Wire Lengths The following are the recommended wire lengths in feet to cover 160 - 10 meters. Put together a second story, indoor, end fed using the 9:1 from your workshop. for later and start with a wire antenna. The Maple Leaf"QSO-KING" is an end fed, multiband, wire antenna that will cover all bands from160 to 6 meters, including the WARC Bands, as well as 60 metersandMARS frequencies. The Zepp, short for Zeppelin is any resonant antenna end-fed by ladder line. Notice how the feedpoint is not quite as high impedance as the top of the antenna. Mine runs from the top of my porch - 10 ft above ground - sloping up into a neighboring tree. The wire is more expensive than others but resists kinking and has a very rugged PVC coating. EFHW-4010 Multiband End Fed Half Wave Antenna – 63ft (19. EFHW featured in "Stealth. 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". Tie the fishing cord to the loops. This system, according to Ron, would take care of the problems I encountered with the random wire/1:9 balun/tuner concept. This is a 200 Watt PEP step up transformer for end fed full and half wave antennas without radials, designed as a 200 Watt PEP upgrade by PA0EJH for the originaly Par Electronics designed 25 Watt HF endfedz multiband end fed antenna. The only trick is matching the input imped-ance of the antenna system to the output impedance of your transceiver (± 50 Ω). First, find some. , 84 / 5 ≈ 17 ft). It is a resonant Half wave on 40m (7MHz) therefore also resonant on second, third and fourth harmonics. 468 ÷ freq (mHz) = Length (feet). the radiating wire is just 1mm thick stainless steel wire. endfed antenna This end fed type of antenna was marketted in the UK and is a useful system for the portable set-up. Welcome to my ham page. Tee Antenna. 000 mhz to 30. The radiator wire is custom made for us in 21 mile runs. With this version of the antenna, interaction between elements and top resonance have been turned to our advantage allowing for excellent multi-band working, while maintaining a useful radiation pattern and efficiency on almost all Amateur Radio bands. Where the antenna wire passes close by several trees, it is held away from the tree trunk by the use of a nail-on electric fence insulator. EFwire, end fed multiband wire antennas require less space than center fed dipoles. A very simple antenna to make, deploy and use is an end fed wire antenna. Getting a Big DX Signal on 160-10 m from One Small, Low Antenna Chuck Counselman, W1HIS I live on a small lot in a dense, inner suburb of Boston and Cambridge. 95 Shipping/Packing for USA shipments via Priority Mail. • 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. the radiating wire is just 1mm thick stainless steel wire. Below is one example of how to build an 80 metre band long wire antenna for a house with a smaller garden. 41 - TCFTFD Dipole Antenna. a EFHW), antenna impedance is in the 2000-4000 ohms range. This end fed type of antenna was marketted in the UK and is a useful system for the portable set-up. The antenna is very easy to install because there is no need of a high feed point like a dipole antenna. Put together a second story, indoor, end fed using the 9:1 from your workshop. These End fed antennas are unique, as they are resonant on 8 bands and DO NOT require a tuner to operate. That is an end-fed, but very different then the half wave construction. Tie a loop on each end of the two 22 foot wires. We have designed a range of half wave end fed wire antennas. Onn 7 MHz, it is an end-fed half-wave with a horizontal mid-point for high angle close-in contacts. An End Fed Halfwave Antenna for Portable Ops I’m a very casual operator, and an even more casual portable operator. Popularity doesn't guarantee high antenna performance - The all time favorite wire antenna is the half-wavelength, center-fed, dipole. The impedance of a half wave dipole at the center feedpoint is close enough to 50 ohms to simply attaching a 50 ohm coax from it to your radio. 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. In this article I will try to share my experience with the end fed long wire antenna. This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. CM End fed multi-band using a single coil to adjust resonance CM CE SY L1=2. 44 - Counterpoise Longwire. Specially made for the portable user comes complete fixed with winder to unun to store away with ease while on the move. 2 metres as the length is non-resonant for radio amateur HF bands 80, 40, 20 and 17m. I test on the fly and learn from that. I started by pounding a 8 foot ground rod into damp earth at a strategic spot about 5 feet from the base of a tree in my back yard. One leg of this antenna is 45 feet long and the other leg is 90 feet long. 50 Add to basket; 12m 24mhz Mono-band end-fed-antenna with mounting bracket. END FED DIPOLE 80-6 meter Portable HF Antenna Matchbox System. My main reason for not putting much effort into portable operation is that when I go out into nature, I want to enjoy my surroundings and not be distracted by radios. However, my first field test of this antenna during The 2015 Flight of the Bumblebees indicated this antenna doesn't perform as well on 20m or 40m as does a 28' end-fed wire. The wire itself is not critical as long as it is roughly this size. End-fed, half-wave antennas (EFHWs) are a half-wavelength long and are resonant. END FED HALF WAVE ANTENNA; MTC sells Wire antennas from RadioWavz and MFJ. The tuner can housed in a plastic container and thin, light coax used. Wire Antenna Design Lengths. They can radiate well* since the high current portion (the portion in the middle approximately third of the half-wave wire that does most of the radiating) is up and away from the radio and local absorption losses near the ends. wa7ark 3 What is an End Fed Half Wave Antenna? Let's call it a "EFHW" Works on a similar principle to a Zepp and J-Pole ~0. The radiator is 45 feet of genuine #14 black polyethylene coated Flex-Weave wire. Beginning Thursday, September 12th, customers can purchase these antennas directly at their website at Vibroplex. I specifically wanted stranded wire. 0 'Height of apex above ground SY PoleX=sqr((L2/2)^2. The NI4L end-fed 40-6m dipole antenna is just about perfect for portable operation. 7K resistor across the tuner antenna connections and tune the analyzer to the band portion to which you want to center the antenna. I've built a 2 meter ground plane antenna that works pretty well for RX and has a decent SWR on 2 meters with my Alinco. Extend the pole and set it up. Stainless Hardware, UV resistant materials throughout. Ventenna for VHF/UHF. Onn 7 MHz, it is an end-fed half-wave with a horizontal mid-point for high angle close-in contacts. They are affected by height above the ground and surrounding objects. com/hamradioconcepts. The Half Square antenna is a wire antenna with two vertical radiators fed in phase. The total length is 135 feet. The VSWR for the center-fed is under 1. Steve Nichols G0KYA Contents 1. The RadioWavz End Fed Half Wave (EFH) antenna product line was originally designed to provide channelized. Before I added 80 meter, I operated that band with a end-fed wire antenna. A few months ago I bought a FT140-43 toroid to make myself a homebrew End Fed wire antenna,without the need for a tuner. 37 - Multi-Band Portable Antenna. It is a resonant Half wave on 40m (7MHz) therefore also resonant on second, third and fourth harmonics. Shortwave End Fed Wire Antenna w/ Balun. Running 500+ watts through a tuner into a coax fed system with an SWR of 15 will most likely arc in the connectors or turn your tuner, amplifier, or balun into a toaster. The wire itself is not critical as long as it is roughly this size. The W1SFR End Fed Antenna is 35′ long and made with 18 ga Davis RF "PolyStealth" antenna wire, or Wireman "silky" 18ga. Re: Homebrew 9:1 unun fed wire antennas. (That dipole may be cut to length on a specific frequency or it may be "however long you can make it", but it's still a dipole, not an end-fed wire. Solid Core Wire (two colors, 24-gauge recommended). A random wire antenna usually consists of a long (at least one quarter wavelength) wire with one end connected to the radio and the other in free space, arranged in any way most convenient for the space available. End-fed, half-wave antennas (EFHWs) are a half-wavelength long and are resonant. 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. This antenna works quite well no issues. if end-fed is the only option, go for EFHWA (End Fed Half Wave Antenna): it won't work on odd bands, but at least at 10, 20, 40, 80 and 160m efficiency will be reasonable. Insulators can be fancy commercial glass or plastic ones, or simple. 1982hp, end fed horizontal wire ant. Like the one of PA3HHO or the one of N4SPP but made by CT1DTE, Luis Valadas. As described in the accompanying article, the half-wave end-fed antenna can be as effective as the common center fed dipole antenna yet is simpler to put up and much easier to carry along for. Other EFHW antenna designs by VK SOTA activators: Glenn VK3YY; Garry VK2GAZ; Reference site: Steve Yates AA5TB The End Fed Half Wave Antenna. by Joe Everhart, N2CX [email protected] End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. Wire Antennas. The Par Electronics EF-SWL is an end-fed short wave antenna optimally designed for 1-30 MHz reception.
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