End Fed Wire Antenna

This antenna wire is fed via a section of parallel-wire transmission line with 1/4 the length of the antenna wire (i. Paypal Only. However, I'm experimenting with SDR quite a bit and would really like to bu. This antenna is a bi-directional resonant antenna. The intent of this unun is to allow full HF coverage for portable applications or in restricted installations such as HOA managed communities. The center is 20 feet long and the two outer ends are 6-1/4 feet each. The EFHW antenna is a popular choice among VK SOTA activators. EFwire antennas are also great portable multiband antennas that can easily be deployed using trees, glass fibre masts, flag poles. Frequency Coverage: 10-40 Meters / 10-80 Meters. W4ZCB is situated on a small mountain in North Carolina. 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. 065", 12 gauge is. Portable Multi-band/ Half-wave 49:1 matching transformer, ready built with all fittings, just add the antenna wire. , 800w 1982MP End Fed, 1/2 Wave, 80-10M, 300W, Wire Antenna End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. Next, space the spreaders with the wires through the holes at intervals of either 18 or 20 inches (45. 37 - Multi-Band Portable Antenna. 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 right picture shows that same end insulator from the other side and gives a good idea how low this antenna really is. I purchased my 'MFJ-1984MP end fed 1/2 Wave 300W 40M-10M Wire Antenna' from a local ham radio outlet store. Huntsville Store: Skip to the end of the images gallery. This antenna is a bi-directional resonant antenna. A simple tuner will match over something more than an octave (2 x frequency) so. 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. Portrayed below is a complete and self-contained NEC model of one popular form of the end-fed half-wave dipole antenna. In its standard configuration, a collinear antenna uses phase reversing stubs added at the ends of a center fed dipole. 38 – Off-center-fed Full-wave Doublet Antenna. However, I'm experimenting with SDR quite a bit and would really like to bu. The coax connector is at one end of the dipole, where it is most needed. Tokyo Ham Fair and Huntsville Hamfest- Kenwood TH-D74 Released D-Star Radio. 38 - Off-center-fed Full-wave Doublet Antenna. The end fed antenna is essentially half a dipole, it uses a good earth connection to complete the arangment. An End Fed Halfwave Antenna for Portable Ops I’m a very casual operator, and an even more casual portable operator. End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. 131 - Coax-Cable Collinear Antennas. They are affected by height above the ground and surrounding objects. Different sources use different expressions for the threshold of when an antenna becomes a long-wire antenna. wire antenna really shines. You might have the parts sitting there in your shack to build one yourself. Wire Antennas for Ham Radio. This portion becomes an inverted "L" ungrounded quarter wave vertical, 39 meters in length, made up of #14 stranded (7x22) copper-clad antenna wire. 46 - Piggyback Antenna for 10m. End Fed 40m and 80m coils, 80m hanging down due to lack of space Practice. "An Unorthodox Antenna"): an 84' long end fed and a 17' long counterpoise (6. 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. End fed 7 band wire antenna for 80m, 40, (20m, 17m) 15m, 12m, 10m. End Fed Wire: The first antenna that I put up was a simple end fed wire. 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. AA5TB has you connect a 4. It is a resonant Half wave on 40m (7MHz) therefore also resonant on second, third and fourth harmonics. (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. 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. Center fed wire 35 feet above ground –14 MHz 1/2wl 180 degrees 35’ 68 ohms (resonant) 3/8 wl 135 degrees 25. No long counterpoise, radials or feedline required. The feed point is conveniently located at the end of the antenna and attachment point making the EFwire antennas light and discrete. hf antennas. We continue our antenna offerings with this single band, 80m-10m end fed half wave wire antenna. We called them "Hy End Fed Antenna". With this in mind, I purchased 9:1 UN UN from Balun Designs and ran another end-fed this time with a wire length of 52 1⁄2 feet, again from the palm tree but to a different corner of the house, then a 100 feet of RG-8X from the UN UN to. wire antenna really shines. FULL HF Coverage, no tuner needed on most frequencies. Above is a diagram from the ARRL Antenna Handbook (Silver 2011). Fast Setup and takedown. Welcome to RadioWavZ Antenna Company • Home of the worlds first 160-6 Meter Hexbeam. 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. The simplest field antenna involves tossing a weighted line over the nearest high tree, pulling the wire up as high as it will go, and feeding it from the end. The basic formula for determining the length of a center fed, half-wave wire Dipole or Inverted Vee antenna is:. Tune the capacitor on the tuner to get the lowest SWR. A random wire antenna is a radio antenna consisting of a long wire suspended above the ground, whose length does not bear a relation to the wavelength of the radio waves used, but is typically chosen more for convenience. 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. End Fed Wire Antenna. SWE-100 HF Broadband Antenna Single Wire End Fed Dipole 3. I test on the fly and learn from that. A very simple antenna to make, deploy and use is an end fed wire antenna. 45e-6 ‘Coil inductance (4. The antenna will be resonate at the Amateur bands specified for each model with very low to almost flat SWR. In this weeks video we build a simple long wire antenna. Product Brief. Here are instructions for making a multiband end-fed half-wavelength antenna that works on 17, 20, 30, and 40-meter bands. However, the end-fed antenna is sim-ple, cheap, and easy to erect; suits many house and garden layouts and is equally amenable to base or portable operation. An Inverted V Fan dipole antenna for 20m an 40m has been used as reference to compare different versions of the impedance transformer. It doesn’t seem to matter whether the UNUN is in the circuit or not. This calculator was adapted from the Coil-Shortened Dipole Antenna Calculator. EFwire, end fed multiband wire antennas require less space than center fed dipoles. End Fed Half Wave Antennas VS Random Length End Fed Antennas Different fibreglass poles for Amateur Ham Radio & EFHW 20Mtr wire antenna. This antenna comes in 2 different lengths for bands, and 3 different power handling options. Figure 1 - Basic 75 Meter Dipole For best results on 160 meters, the tuner must be low loss. It is a resonant Half wave on 80m (3. See the Halfer kit page for additional details. Absolutely brilliant end-fed antenna, the build quality is superb and customer service is top notch, Ian is an absolute gentleman to deal with. 95 Shipping/Packing for USA shipments via Priority Mail. The good, the bad. The Sleeve dipole has traditionally been used by VHF antenna designers by sliding an external metal sleeve over the coax and connecting the sleeve to the braid of the coax so that the antenna appears to be centre-fed with an outboard “sleeve”. It is easy to build and it performs adequately. The wire and feed line are light enough that it can be mounted with just the two ends supported. It is a resonant Half wave on 40m (7MHz) therefore also resonant on second, third and fourth harmonics. When the feedline is connected to the center of a half-wave antenna, the feedpoint impedance is theoretically 72 ohms, which is a good match to both 50-ohm and 70-ohm coax and the. The wire itself is not critical as long as it is roughly this size. The dipole was invented by Heinrich Hertz around 1886. An Inverted V Fan dipole antenna for 20m an 40m has been used as reference to compare different versions of the impedance transformer. That is to say that the antenna is the same length as a half-wave dipole antenna. The problem with an end fed half wave antenna is that the antenna presents a high impedance, creating a. An antenna erected over poor ground (deep shale, granite or desert sand) may appear to be many feet higher over ground than it is. 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. Below a small description of an easy to make and cheap multiband wire vertical. 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. 8 cm) apart. At its fundamental resonant frequency, in free space and for an infinitesimal thin wire, the dipole’s theoretical center feed impedance would be 73 Ω. EFHW-4010 Multiband End Fed Half Wave Antenna - 63ft (19. I own a couple of "end fed" wire antennas. 5 mm copper wire with black plastic jacket. This material is very strong yet can easily be coiled like a rope for portable work. An End-Fed 40m-6m Short Wire Antenna or a "Shorty for Forty and Up" That is the entire antenna. , 67 / 4 ≈ 17 ft). 00 mhz Made 1. Operate mostly psk. The MFJ end-fed Zepp is a completely assembled single band half-wave antenna. 3:1) on 80m and 40m, and below 3:1 on 20, 15 and 10m. Manufacturers of High Quality HF END FED Wire Antennas De trendsetters van de eindgevoede antennes sinds 2006. Higher almost always. 133 - Collinear Zepp Antenna. Twin-Led Marconi Antenna. 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. 66) end support. It will be connected to the 'balanced feeder terminal' of my Z match AMU. To support an antenna, I have no tower, and only two trees that aren’t too close to a house. 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. It is about as basic as it gets and it can work quite well on any HF band. As the impedance will be high at the end of the wire, some form of matching unit is needed and a simple parallel tuned circuit housed in a plastic film container is fine (figure 1). The other 6 feet will be used to support the antenna at the ground ends, (gray closest to ground), and for jumpers. 3:1) on 80m and 40m, and below 3:1 on 20, 15 and 10m. One vertical element ( 1/4 wave ) is fed at the top where it is attached to an SO 239. 45' x 30" UHF Connector. Check Store Stock. Paypal Only. 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. Put contact cement on the tooth picks, or match stems before. Here are some photos of one of my 9:1 baluns. However, if that wire will be under 1/4-wavelength above ground, you may be better off with a simple broadside doublet at the upper level. Longer wire lengths will certainly be more efficient and provide better performance. I found that I needed to add about a 10 foot long counterpoise to help reduce the RF in the shack on 30 and 17 meters. The Zepp, short for Zeppelin is any resonant antenna end-fed by ladder line. 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. Wire Antenna Design Lengths. Though a short conductor is shown to the right of the right hand feed line wire, the length is not specified or discussed in the accompanying text. 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. EndFed 1/2 Wave 800W 80M-10M Wire Antenna SKU: ZMF-1982HP. of NOT hanging a heavy coaxial feeder from a long span of thin antenna wire, has rekindled interest in end-fed half-wave antennas. The popular End-Fed Half-Wave (EFHW) Antenna is an easily portable, high-impedance (2,000-4,000 ohm) wire antenna that resonates on its fundamental frequency and all harmonics above. 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. Over this span of time, End-Fed users have come up with a group of Magic Numbers. Palomar Engineers employs a dual core matching system that offers wide bandwidth (1-61 MHz), 500 watt PEP rating, and a connection for a counterpoise or ground if desired. I used a 2' long wire braid and a 1' long stake in the ground to create about 3' (1m) of return ("counterpoise"). Only 5 m usable (top section to thin). The SWE-100 is a single wire end fed HF broad- band antenna designed for either permanent or quick deployment casual use. Wire Antennas for the Beginner Every ham knows how to make and install wire antennas. The SWR was adjusted using the tapping point on the coil near the feeder. Put the strain relief at the wick and solder eyelet on the antenna, suppose 40 or 80 meter band off. Shortwave End Fed Wire Antenna w/ Balun. This end fed type of antenna was marketted in the UK and is a useful system for the portable set-up. 30 Watts QRP, 80-10 Meters, 132 feet. single wire for a total length of. Model 4132 - 4:1 Unun for Multiband Verticals and Random Wires, 2kW. 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). That sounds like an oxymoron. It is a resonant Half wave low on 80m (3. EFHW featured in "Stealth. Added a 17 foot counterpoise that heads off the 9:1 in the opposite direction as the antenna wire. 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. 5 mm copper wire with black plastic jacket. It consists of an 85ft wire fed against a 17ft counterpoise (attached to the earth point on the ATU). Using the EFHW for 20m at GB0CMS 3. PackTenna makes ultralight, portable HF amateur radio antenna systems and accessories. Antenna can be known as – and is similar to: Sleeve Dipole / Flowerpot Antenna. 18m counterpoise. In the mean time,I changed my 3-bands wire,for a 5-bands wire. Frequency Range. Applying a feed to any antenna in NEC or any electromagnetic simulation software is about a simple a task as can be conceived by placing a "source" of near infinitesimal size inline with a dipole element. On 20 it is much the same, just more wire on the side opposite the feedpoint. 9:1 Ununs are useful between coax and long wires with load impedances near 450 ohms. This in turn means that the antenna is fed at the end closest, or even inside the shack. I purchased my 'MFJ-1984MP end fed 1/2 Wave 300W 40M-10M Wire Antenna' from a local ham radio outlet store. 0:1 on the 11 meters band it was built for. END FED, 1/2 WAVE, 40-10M, 300W, WIRE ANTENNA FULL HF Coverage, no tuner needed on most frequencies. Building an End Fed Random Wire Antenna. Very convenient and simple. For the past couple of weeks, I've been playing with end-fed wire antennas. This is an End Fed Long Wire wire antenna that will cover all bands from 80 to10 meters, including the WARC Bands, as well as 60 meters and MARS frequencies. An overview and where it all started 2. However it is limited to use on a single band. If you look closely, you can see the screw in the tree trunk. 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. The feed point is conveniently located at the end of the antenna and attachment point making the EFwire antennas light and discrete. There are plenty of end fed wire antennas commercially available for around $75, but you can build the core of this antenna for less than $10. 43 - Rhombic Inverted-Vee Antenna. I used a 2' long wire braid and a 1' long stake in the ground to create about 3' (1m) of return ("counterpoise"). The counterpoise wire does not have to be similar in length to the main radiator wire and just a short wire is all that is needed, about 0. The irony, a CW op named Mike! Not a ham? If you happened across this page by chance and are not a ham, you. All DXTREME models are a different design that work most efficiently with the length of wire is sold with. If we feed it with 450 Ohms or any. 2 metres as the length is non-resonant for radio amateur HF bands 80, 40, 20 and 17m. • 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. This describes the pictured EFHW (End Fed Half Wave) antenna in the photos below. "Hy End" because of the quality we remain. Many hams’ first choice of antenna is a half-wave dipole. 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. 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. W4ZCB is situated on a small mountain in North Carolina. All DXTREME models are a different design that work most efficiently with the length of wire is sold with. 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. End-Fed Half-Wave Antennas. The other side of the dipole is a quarter wave "floating" counterpoise for the inverted "L" vertical portion. HF Antennas. On the higher bands 20 meters and up it will do a fair job at longer distance. EFwire, end fed multiband wire antennas require less space than center fed dipoles. In fact, a half-wave dipole will often outperform many compromise commercial multiband antennas. End-Fed Longwire Antenna with a 9:1 UnUn rated at 700 watts, covering 160 meters through 10 meters, only 124' 6" long. 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. The feeding point of a multiband End Fed antenna is practically a wide band impedance transformer. The wire is then connected to the transmitting and receiving radio communication station. it starts firing off the ends as well as broadside. 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. The intent of this unun is to allow full HF coverage for portable applications or in restricted installations such as HOA managed communities. In its standard configuration, a collinear antenna uses phase reversing stubs added at the ends of a center fed dipole. Current along the half wave. This antenna works in high frequency range. The NI4L end-fed 40-6m dipole antenna is just about perfect for portable operation. The Sleeve dipole has traditionally been used by VHF antenna designers by sliding an external metal sleeve over the coax and connecting the sleeve to the braid of the coax so that the antenna appears to be centre-fed with an outboard “sleeve”. 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. For a number of years I just used a circuit that I threw together with large components that I had in my junk box. The SWR was adjusted using the tapping point on the coil near the feeder. Now, in no particular order of preference, here are N4KC's Top Five Get-on-the-Air-Quickly Antennas: #1 - The half-wave wire dipole. 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. Remote End-Fed Antenna Having the antenna feedpoint remote from the shack (Fig 15. 18m counterpoise. An antenna erected over poor ground (deep shale, granite or desert sand) may appear to be many feet higher over ground than it is. Absolutely brilliant end-fed antenna, the build quality is superb and customer service is top notch, Ian is an absolute gentleman to deal with. EndFed 1/2 Wave 800W 80M-10M Wire Antenna SKU: ZMF-1982HP. Note that any of these lengths are going to be long on 6 meters. I found that I needed to add about a 10 foot long counterpoise to help reduce the RF in the shack on 30 and 17 meters. The antenna can be fed as a random wire on other bands. This material is very strong yet can easily be coiled like a rope for portable work. 45' x 30" UHF Connector. Though a short conductor is shown to the right of the right hand feed line wire, the length is not specified or discussed in the accompanying text. End Fed Half Wave Antennas VS Random Length End Fed Antennas Different fibreglass poles for Amateur Ham Radio & EFHW 20Mtr wire antenna. 000 mhz to 30. 00 mhz Made 1. Half-wave dipoles are easy to install and erect and are not nearly as likely as end-fed. This formula takes into consideration the capacitive "end-effect" from insulators which shortens the physical length requirement for the equivalent electrical length. 80/40 Resonant End Fed (sloper, loaded end at 25 feet, feedpoint at 3 feet) Test Procedure. We offer a variety of multi-band and all-band dipoles that provide great receiving performance with low SWR. It consists of a main board with tuner and SWR indicator, two trap pcb's and an end wire support. This move is a positive for both companies and we are excited about the future going forward. The Zepp, short for Zeppelin is any resonant antenna end-fed by ladder line. 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. 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". The EFHWA needs a ground connection, but it does not need to be very extensive. AA5TB has you connect a 4. 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. Some books say that you don’t use the counterpoise at all on 10m. referred to as a Marconi antenna. That is an end fed quarter wavelength piece of wire run. This is showing the feed point SWR at 3200Ω. But for everyone else, YMMV. Before I get into the nitty-gritty details, let me first make a distinction between end-fed half-wave antennas, such as the ones sold by LNR Precision and end-fed wires that use some kind of tuning to achieve a 50 Ω output impedance. The UV resistant ABS plastic housing encloses an efficient matching network allowing the antenna to be fed with common 50 ohm coaxial cable. However, when using it with an End-Fed. 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 impedance suits best to most tranceivers. 75', 3/16" 100% Dacron Polyester Rope. 160-10 Meter W7FG True Ladder Line Open Wire Fed Dipole 240' Dipole With 150' Feed Line $197. End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. This is an End Fed Long Wire wire antenna that will cover all bands from 80 to10 meters, including the WARC Bands, as well as 60 meters and MARS frequencies. But don’t be misled – just because they are easy to make doesn’t mean they don’t work well. When fed from the center, a dipole makes for an easy impedance match to 50 ohm coax. It consists of a main board with tuner and SWR indicator, two trap pcb’s and an end wire support. i have worked 70 countrys in six months including a. This means that the end fed wire antenna, which has a very high impedance of around 2500 Ohm, is transformed to an impedance of 50 Ohm. The original design has a 27/3 turn ratio ( 1: 81 ) on a small 43. Full size version with wire length 41m. LNR is pleased to announce that the PAR EndfedZ line of wire antennas has been acquired by Vibroplex. dom-length dipole fed with an open-wire feed line. 44 - Counterpoise Longwire. 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. There are plenty of end fed wire antennas commercially available for around $75, but you can build the core of this antenna for less than $10. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. This appears to give quarter wave antenna. 7K resistor across the tuner antenna connections and tune the analyzer to the band portion to which you want to center the antenna. This antenna is a bi-directional resonant antenna. So do all antennas, but not at the design frequency - there, at the design frequency, the terminal impedance is quite predictable. Very convenient and simple. The antenna wire is then typically take out of the radio room, or shack and taken to a horizontal section that runs above obstructions. 300 watts New style resonant end fed antenna requires no counterpoise. The basic formula for determining the length of a center fed, half-wave wire Dipole or Inverted Vee antenna is: 468 ÷ freq (mHz) = Length (feet). 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". It will give you a lower radiation angle than the pair of wires. 5 mm copper wire with black plastic jacket. Using the EFHW for 20m at GB0CMS 3. 5 Wave-Length wire on lowest band (130ft on 80m, 67ft on 40m) Fed from one end using a transformer in a box. Below is one example of how to build an 80 metre band long wire antenna for a house with a smaller garden. Paypal Only. Leave the antenna tuner alone and start pruning the antenna wire until the SWR drops to the value with the resistor connected. However, I'm experimenting with SDR quite a bit and would really like to bu. Using the EFHW for 20m at GB0CMS 3. Only 30 and 40 meters are fully symetrical Vees, but all wires are a full 1/2-wave for the given band. 000 mhz to 30. The number of variations are endless. I discovered antenna computer modeling as an alternative to the cut-n-try methods. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. 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. Random Wire Antenna Lengths. 0 ‘Height of apex above ground SY PoleX=sqr((L2/2)^2. These End fed antennas are unique, as they are resonant on 8 bands and DO NOT require a tuner to operate. The other side of the dipole is a quarter wave "floating" counterpoise for the inverted "L" vertical portion. 45' x 30" UHF Connector. 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. 0 ‘Height of ends above ground SY ApexHeight=4. 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. Minimum handling and a relatively high efficiency. The wire is then connected to the transmitting and receiving radio communication station. for later and start with a wire antenna. The problem with a lot of portable antennas and antennas in confined spaces is the low efficiency of those antennas. The Par Electronics EF-SWL is an end-fed short wave antenna optimally designed for 1-30 MHz reception. high will yield good performance. I believe it could be used to tune for other bands as well. 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. These antennas usually work better if they have an RF ground "plane. Paypal Only. End Fed Antennas with no Radials Due to the lack of open space in my yard it is almost impossible to install radials for vertical or end fed wire antennas. FULL HF Coverage, no tuner needed on most frequencies. 9:1 Ununs are useful between coax and long wires with load impedances near 450 ohms. Step#4 --- Attach the end of the antenna wire with the insulator to a high support. The antenna is 33-feet tall and uses stranded 20-ga insulated wire in three sections. Shortwave End Fed Wire Antenna w/ Balun. 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. The Openwire Fed Dipole (OFD) is simply a dipole fed in the middle with any kind of openwire or balanced feedline. EndFedZ Antenna Acquisition. However, just because an antenna can be made to work is no guarantee that it will perform efficiently. This portion becomes an inverted "L" ungrounded quarter wave vertical, 39 meters in length, made up of #14 stranded (7x22) copper-clad antenna wire. The problem with a lot of portable antennas and antennas in confined spaces is the low efficiency of those antennas. The antenna has a full 300kHz bandwidth on 80m between 3:1 SWR points. The height is important, but not as important as the length; just get it up highs as you can, preferably high enough to be in the clear and above any existing structures. Frequency Coverage: 10-40 Meters / 10-80 Meters. Now, in no particular order of preference, here are N4KC's Top Five Get-on-the-Air-Quickly Antennas: #1 - The half-wave wire dipole. Check Store Stock. Build instruction impedance transformer for End Fed antenna's. END FED DIPOLE 80-6 meter Portable HF Antenna Matchbox System. (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. 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. 99 Buy It Now , $7. That is to say that the antenna is the same length as a half-wave dipole antenna. The other end connects to the random-wire connector on a suitable antenna tuner. The OCF40Q Off Center Fed Antenna in action on You Tube: You Tube Video. But for everyone else, YMMV. As we know, the impedance of the dipole is around 70 Ohms (flat top) or 50 Ohms (Inv. Shortwave End Fed Wire Antenna w/ Balun. This portion becomes an inverted "L" ungrounded quarter wave vertical, 39 meters in length, made up of #14 stranded (7x22) copper-clad antenna wire. End Fed Vertical Antenna Variations. 00 mhz Made 1. Counter to tuning a length of wire like you would with a dipole, with a random wire you don’t. A “general purpose” end fed half-wave wire antenna can work OK* and is very simple to deploy in the field. Paypal Only. Add to Wish List. EndFed 1/2 Wave 800W 80M-10M Wire Antenna SKU: ZMF-1982HP. At the moment I'm really just after receiving, but a nice-to-have would be allowing to use it for transmitting without much modification, in the future. 15 metres, or thereabouts, long. On 20 it is much the same, just more wire on the side opposite the feedpoint. 8-Band antennas need. End Fed Half Wave Antennas VS Random Length End Fed. 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. Supported as Inverted V on squid pole Taking Andrew’s lead, the EFHW on 40 meters was constructed using flexible light duty AWG25 wire cut to 20. Do not invert or "dog leg" the wire as this will impact expected performance. 000 mhz to 30. Half-wave dipoles are easy to install and erect and are not nearly as likely as end-fed. It is about as basic as it gets and it can work quite well on any HF band. Being a half wave, no radials or counterpose wires are needed. The radiator is 45 feet of genuine #14 black polyethylene coated Flex-Weave wire. 1982hp, end fed horizontal wire ant. The Zepp, short for Zeppelin is any resonant antenna end-fed by ladder line. ) If you would rather calculate the length of a full-size. ; No long counterpoise, radials or feedline required. Note that any of these lengths are going to be long on 6 meters. In the mean time,I changed my 3-bands wire,for a 5-bands wire. -V) at the feedpoint. I then passed the wire through the end of an insulator, and bent the irrigation tubing round using 3 cable ties to hold in position. As long as you are feeding the wire in 1/2 wavelength multiples you don't need ground radials or a counterpoise. The MFJ-6120 - 20 Meter Hang & Play End Fed Zepp Antenna. For a number of years I just used a circuit that I threw together with large components that I had in my junk box. 5' for 20m). An overview and where it all started 2. The Marvelous 10/20/40 Half-Wave End-Fed Antenna. , parallel tuned circuit link coupled) with a resistor across the output as shown on the schematic below. A single heavy conductor extends the ground connection up to the. Solid Core Wire (two colors, 24-gauge recommended). L1 = 30 uH, 35 turns of 2. Applying a feed to any antenna in NEC or any electromagnetic simulation software is about a simple a task as can be conceived by placing a "source" of near infinitesimal size inline with a dipole element. 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. The 25m long antenna described here will get you on air without an ATU on 80m, 40m, 20m, 15m & 10m. The radiator wire is custom made for us in 21 mile runs. 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. EFHW-4010 Multiband End Fed Half Wave Antenna – 63ft (19. single wire for a total length of. The ULTIMAX DXTREME end-fed antenna covering 1. End-fed wires resonate on their 1/2-wave fundamental frequency plus all odd and even harmonics above. Hi For sale here is an end fed antenna designed for 10m-160m. 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!. Like all end-fed antennas, there's nothing magical about them or should be. Being a non-resonant length the feed point shouldn't exhibit a very high impedance thus placing the End Fed wire antenna impedance within range of my homebrew T. A simple tuner will match over something more than an octave (2 x frequency) so. First Published: 14 August 2014 Last Update: 29 September 2017. The antenna is made of #14 plastic coated solid copper wire. 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. 15 metres, or thereabouts, long. End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. 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 No-Tuner, All-HF-Band, Horizontal, Center-Fed Antenna is our old friend, the 80 meter halfwave dipole dressed up a bit. So all 44m or wire is in one continuous piece. L1 = 30 uH, 35 turns of 2. This article will initially concentrate on the half wavelength of wire and its use as an effective multiband antenna. End-fed wires resonate on their 1/2-wave fundamental frequency plus all odd and even harmonics above. 700 amateur radio topics - 6,000 links & 133 pages - from antennas to zones NOTE: AC6V. The end-fed "random-length wire" is the most commonly used because it can be strung up in the air between the receiver and a tall support some distance away from the building where your shortwave receiver is located. 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. Firstly the antenna is a longwire antenna, which means all the wire is stretched out in one direction from the feed point. You apply a little RF and adjust the antenna tuner to achieve the lowest SWR. 08") Open the wire gauge and diameter calculator in a. You may use 12- or 14-AWG instead. 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. Since the end fed wire is in the air it still can benefit from an RF ground "plane" underneath the antenna. The wire is then connected to the transmitting and receiving radio communication station. Put together a second story, indoor, end fed using the 9:1 from your workshop. Here are some photos of one of my 9:1 baluns. The wire itself is not critical as long as it is roughly this size. At the moment I'm really just after receiving, but a nice-to-have would be allowing to use it for transmitting without much modification, in the future. The antenna has a full 300kHz bandwidth on 80m between 3:1 SWR points. The other 6 feet will be used to support the antenna at the ground ends, (gray closest to ground), and for jumpers. Usually any wire length that is non resonant on the band or bands desired will work with the 4:1 ratio. 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. 000 mhz to 30. Such an antenna requires a special coupling network to properly couple my 50 ohm coax to the antenna's high impedance (~2500 ohms). The first 6ft (1. 1982hp, end fed horizontal wire ant. As we know, the impedance of the dipole is around 70 Ohms (flat top) or 50 Ohms (Inv. A random wire is exactly that—a piece of wire that's as long as you can possibly make it. I support the feedpoint on a push-up painters pole on the rear of an RV trailer and drape the wire over a nearby tree branch. 95 Shipping/Packing for USA shipments via Priority Mail. This article will not address that antenna type. I will continue to test the KE4PT antenna. The Sleeve dipole has traditionally been used by VHF antenna designers by sliding an external metal sleeve over the coax and connecting the sleeve to the braid of the coax so that the antenna appears to be centre-fed with an outboard “sleeve”. , we do not ship. An 84 ft long end-fed antenna wire, with a "counterpoise" wire of 1/5 the length of that antenna wire (i. 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. One leg of this antenna is 45 feet long and the other leg is 90 feet long. 5MHz), therefore it is also resonant on the second, third and fourth harmonics. If you want a very good wire antenna for 40m/80m then this is the one to get. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. Specially made for the portable user comes complete fixed with winder to unun to store away with ease while on the move. 4 payment is due within 72 hours of offer end. Notice how the feedpoint is not quite as high impedance as the top of the antenna. 100 Watt, with solid tensile stools. ULL HF Coverage, no tuner needed on most frequencies. So do all antennas, but not at the design frequency - there, at the design frequency, the terminal impedance is quite predictable. It works on 80/40/30/20/17/15/12 and 10 meter bands. End Fed HF Antenna MFJ-1982LP Checking out on air, the new MFJ-1982LP end-fed wire antenna. Shortwave End Fed Wire Antenna w/ Balun. 5, 41, 58, 71 and 84 feet. We are running a reduced service due to the covid 19 pandemic , stop at home, stay safe. I've got an EARCHI antenna that barely tunes on almost all of the HF bands. Different setup locations can produce different results. To support an antenna, I have no tower, and only two trees that aren’t too close to a house. •With the antenna legs at a 120 degree angle as viewed from the side, the 4-Band antennas need at least 60 feet of ground space from end-to-end. 5MHz), therefore it is also resonant on the second, third and fourth harmonics. In its standard configuration, a collinear antenna uses phase reversing stubs added at the ends of a center fed dipole. 95 Shipping/Packing for USA shipments via Priority Mail. An Inverted V Fan dipole antenna for 20m an 40m has been used as reference to compare different versions of the impedance transformer. PackTennas use full size wire antenna elements that can be configured. The No-Tuner, All-HF-Band, Horizontal, Center-Fed Antenna is our old friend, the 80 meter halfwave dipole dressed up a bit. MFJ-1982LP END FED, HORIZONTAL WIRE ANTENNA : Note: This listing is for one MFJ-1982LP. Fed at 34% from the end, it uses a single feed wire and can be resonant on more than one band. Figure 1 - Basic 75 Meter Dipole For best results on 160 meters, the tuner must be low loss. 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. But for everyone else, YMMV. End-fed wires resonate on their 1/2-wave fundamental frequency plus all odd and even harmonics above. 4:1 impedance ratio is 2:1 turns ratio. Half-Lamda Tee Antenna. I did perform S11 on both to trim for the 30m band. This describes the pictured EFHW (End Fed Half Wave) antenna in the photos below. 80/40 Resonant End Fed (sloper, loaded end at 25 feet, feedpoint at 3 feet) Test Procedure. Cut your wire in half (each end is now 234/frequency), and insert a center insulator in the middle. However, I'm experimenting with SDR quite a bit and would really like to bu. Mine runs from the top of my porch - 10 ft above ground - sloping up into a neighboring tree. They are 2, 6, 10, 20, and 40 meters. 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. The idea was to test each antenna in as equivalent band conditions as possible. (unun covers 160 to 10 meter) with black array. Fast Setup and takedown. ; End-Fed Horizontal Wires (EFHW) cover multiple bands with-out traps. Shortwave End Fed Wire Antenna w/ Balun. MFJ-1984HP EndFed 1/2 Wave 800W 40M-10M Wire Antenna 66 feet. The problem with a lot of portable antennas and antennas in confined spaces is the low efficiency of those antennas. If we feed it with 450 Ohms or any. Notice how the feedpoint is not quite as high impedance as the top of the antenna. A so-called random wire antenna is an end fed antenna. To make the best use of an End-Fed antenna, it should be fed with a transformer. Usually any wire length that is non resonant on the band or bands desired will work with the 4:1 ratio. 0 ‘Length from start to coil SY Lcoil=0. This move is a positive for both companies and we are excited about the future going forward. For many an End Fed antenna is the easiest solution to their property. The company provides end-fed wire antennas either as mono-band or multi-band. EFwire antennas are also great portable multiband antennas that can easily be deployed using trees, glass fibre masts, flag poles. The Magic Numbers are lengths that seem to work very well for them. The other end connects to the random-wire connector on a suitable antenna tuner. , 800w 1982MP End Fed, 1/2 Wave, 80-10M, 300W, Wire Antenna End-fed horizontal wire, an EFHW, offers the perfect solution for a wide range of ham activities. 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. Ideal balance of strength and flexibility Low-Gloss finish and small size makes wire disappear into the background. 5 to 108 MHz. Both can be used on multiple bands though the random length one may have a slight advantage there if you. In exchange for simplicity and low cost you give up operational space, meaning, the antenna is small and lightweight for storage but when deployed it will take up a lot of linear feet. For the past couple of weeks, I've been playing with end-fed wire antennas. You might have the parts sitting there in your shack to build one yourself. Above is a diagram from the ARRL Antenna Handbook (Silver 2011). W4ZCB is situated on a small mountain in North Carolina. Leave the antenna tuner alone and start pruning the antenna wire until the SWR drops to the value with the resistor connected. Paypal Only. End-fed antenna for QRP portable ops by Robert Liesenfeld, AK6L · Published October 26, 2017 · Updated August 2, 2018 Some friends and I have been talking about dong a camping trip, and I decided this would be a good opportunity to try some portable ops with an end-fed half wave antenna. Mon Apr 15, 2019 by gm_stack. The problem with a lot of portable antennas and antennas in confined spaces is the low efficiency of those antennas. Having very good results using the tuner in 756 icom pro. 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 Marvelous 10/20/40 Half-Wave End-Fed Antenna. Cut each leg exactly to the same length of 38 feet. However, I'm experimenting with SDR quite a bit and would really like to bu. Ideal balance of strength and flexibility; Low-Gloss finish and small size makes wire disappear into the background. At the moment I'm really just after receiving, but a nice-to-have would be allowing to use it for transmitting without much modification, in the future. The VSWR through the step-up transformer for the end-fed is. This in turn means that the antenna is fed at the end closest, or even inside the shack. I own a couple of "end fed" wire antennas. 160-10 Meter W7FG Open Wire Fed Dipole-240' Top Length Dipole With 150' Feed Line 600Ω Open Wire Ladder Line One Conductor from Balun or Tuner to Far End Insulator. Paypal Only. 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. End Fed Half Wave Antennas VS Random Length End Fed. 45' x 30" UHF Connector. Fast and secure payment. Add to basket. Here are instructions for making a multiband end-fed half-wavelength antenna that works on 17, 20, 30, and 40-meter bands. Frequency Coverage: 10-40 Meters / 10-80 Meters. 468 ÷ freq (mHz) = Length (feet). The radiator wire is custom made for us in 21 mile runs. The radiator is 45 feet of genuine #14 black polyethylene coated Flex-Weave wire. Listening antennas for Asia and Pacific Needed!. ; End-Fed Horizontal Wires (EFHW) cover multiple bands with-out traps. It is about as basic as it gets and it can work quite well on any HF band. Before I added 80 meter, I operated that band with a end-fed wire antenna. The other side of the dipole is a quarter wave "floating" counterpoise for the inverted "L" vertical portion. The first thing I did was buy some 24 guage black wire, specifically this 100 foot spool. 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. Below is one example of how to build an 80 metre band long wire antenna for a house with a smaller garden. com is an archive of Rod/AC6V's webpages, and is no longer being updated. The following tables show the recommended lengths to use for antenna wire based on the bands you wish to cover. 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 formula takes into consideration the capacitive "end-effect" from insulators which shortens the physical length requirement for the equivalent electrical length. 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. ULL HF Coverage, no tuner needed on most frequencies. The third antenna will probably be a multiband version of these antennas (or yagi). I set it up today as a horizontal at about 12 feet above the ground in my back yard. The QRPGuys Portable Multi-Band End Fed Antenna is designed as a portable 40/30/20m two trap wire antenna with a built-in tuner and SWR indicator. The end fed halfwave connects mechanicaly to the UNUN as follow: Phising pole. 45' x 30" UHF Connector. 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. 95 Shipping/Packing for USA shipments via Priority Mail. LW-20 - END-FED LONG WIRE MULTI-BAND ANTENNA 80 - 6 m. •Choose an install location that keeps all parts of the antenna and coax away from long metal objects. Twin-Led Marconi Antenna. This project produces an inexpensive, multiband, end fed HF antenna matchbox that is quick and easy to setup and use. 065", 12 gauge is. The Sleeve dipole has traditionally been used by VHF antenna designers by sliding an external metal sleeve over the coax and connecting the sleeve to the braid of the coax so that the antenna appears to be centre-fed with an outboard “sleeve”. 4 payment is due within 72 hours of offer end. One end of the wire attaches to a tree, pole or other support, preferably at a high point. 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. 160-10 Meter W7FG Open Wire Fed Dipole-240' Top Length Dipole With 150' Feed Line 600Ω Open Wire Ladder Line One Conductor from Balun or Tuner to Far End Insulator. The SWR was adjusted using the tapping point on the coil near the feeder. ,(3,5 - 52 MHz), max. I support the feedpoint on a push-up painters pole on the rear of an RV trailer and drape the wire over a nearby tree branch. 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. Both can be used on multiple bands though the random length one may have a slight advantage there if you. Built into a 1 1/2" PVC Cap. 2 MHz for the FT 240-43 this will be 14. This idea comes from Hans PE1BVQ to buy this pole at Elektrodump (51 euros) I removed the 6 meter vertical and replaced it for this ‘vertical’ the used end fed (my holiday antenna. 5-54 MHz (80-6 Meters) Peak Power: 250W SSB (100W CW/50W Digital) Length: 34 Feet. 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. If it isn't end-fed, then it's usually near-center fed and becomes a dipole antenna instead. Post navigation. W4ZCB is situated on a small mountain in North Carolina. End Fed Half Wave Antennas VS Random Length End Fed. Improvising an End Fed Wire • Think about where most current will be - Current must be zero at an open circuit - Current will be max λ/4 (and 3λ/4) from an open circuit (low impedance, easier to match) • Could be closer if loading coils, capacitance - A high current point high and in the clear usually makes the antenna more efficient. MFJ-1984HP come with 66 feet of wire and cover 40, 30, 20,15, and 10 meters. However, when using it with an End-Fed. 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. 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. 0 'Height of ends above ground SY ApexHeight=4. 95 Shipping/Packing for USA shipments via Priority Mail. 42 – Vee-Sloper Antenna. But for everyone else, YMMV. Hy End Fed antennas are half-wave antennas that basically work similar to a Zepp or Fuchs antenna. 00 mhz Made 1. The magic lengths to use with the End Fed longwire is 29, 35. Figure 1 - Basic 75 Meter Dipole For best results on 160 meters, the tuner must be low loss. 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. EFwire, end fed multiband wire antennas require less space than center fed dipoles. (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. End Fed 40m and 80m coils, 80m hanging down due to lack of space Practice. Some treat all wires at least 1 λ long as long wires. However, I'm experimenting with SDR quite a bit and would really like to bu. 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. Stainless Hardware, UV resistant materials throughout.
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