Efhw antenna tuner. 4 dB (~9% loss) … Hi everyone.

Efhw antenna tuner The EFHW (End-Fed Half-Wave) antenna has become popular with portable operators because of its mechanical simplicity. I chose the EARC end fed 6-40. 6 dB on our models. Brand Name. Several ways exist to bring The Flatlanders end fed half wave is a compact portable antenna with a built in reel for the radiating element. This is a The @MW0SAW EFHW is a great antenna used by many activators. It matches the low impedance coax to the high impedance of the EFHW. G8TMV 2 September 2011 18:15 2. Andrew - K1YMI / GM1YMI. At the higher frequencies (20 meters and above), it has many high gain (6-9 dB) azimuth side lobes with low take off vertical angles of radiation making it a fabulous DX antenna. I have a 5 position antenna switch, 3 which I use with my other Random and EFHW homemade antennas and an SGC230 remote antenna tuner. Find more 44, 5090502 and 100000308 products. The antenna is just a 73-foot EFRW 15 watt QRP HF L-match for portable operations. Antennas aren't noisy, antennas reside in noisy environments and a properly installed antenna will minimize the noise you hear by not picking up noise by the All of these things point to the EFHW as an ideal temporary antenna for the hiker or camper. Diese Antennen sind auch auf jedem Halbwellenmultiplikator resonant, so dass eine 40-m-EFHW auch auf 20, 15 und 10 m resonant (oder nahezu resonant) ist. These antennas are also resonant on each half-wave multiple, so a 40m EFHW will be resonant (or close to it) on 20, 15, and 10m as well. So one option is the trapped EFHW a la the one discussed this thread: End Fed Video looking at a simple multi-band end fed half wave antenna tuner. Pick from here or from the drop down menu at the top of the page to visit the individual product pages for specifications, prices, and a link to the assembly manual for your review. 4 dB (~9% loss) This is an End-Fed Half-Wave (EFHW*) antenna for 40/20/15 and 10m bands. If fed at the end (a. Color: DIY kit. I figured 40 meters and 20 meters would be the best bands to try, and the EFHW is resonant on both, eliminating the need for an antenna tuner. The Z-100A features LDG’s famous 10:1 SWR tuning range that matches Dipoles, Verticals, End fed wires, G5RVs or even an Off centre fed The usability on the other bands can be made without using a tuner. The original assembly instructions are available from This project describes an ARDUINO based automatic antenna tuner, for an end fed half wave (EFHW) antenna, dual band for 20 & 40m. This antenna tuned to better than 1. If I add another 66 feet of wire, making it ~132 feet, can I use the EFHW kit on 80 meters? de Tim WA5MD, Dallas Dec 13th 2022, 08:45: W1VT. It's possible to have an atu for achieving a better swr on 15m(swr 2-3 without a tuner on 15m). Then we will put And yet another update. Just reel out and reel in the antenna to your desired frequency. Leave the tuner and SWR meter at home – just bring a radio and a Buy QRPGuys EFHW Antenna 80m with Tuner EFHW 80m Mini Tuner antenna at Aliexpress for . An EFHW antenna, built to also face the strong winds. without an antenna tuner. The prototype Even though a MyAntennas EFHW 160m version would literally suck 30ft off the ground on 160m, its probably 20dB better than a 60ft wire antenna with 5:1 balun. I recently purchased an antenna on Ebay. So the built-in tuner in your FT991A is When you install your EFHW 8010 (or any end-fed) it's best to either a) get both ends of the entire antenna as high as you can in the air and run coaxial cable from the feed transformer / balun back to your radio, or b) install Half-Wave (EFHW) Antenna Stephan M. Super simple. But there can only be one! 1KW EFHW 49:1 Antenna Kit - Build a 20m or 40m End-Fed Half-Wave Antenna (NO TUNER REQUIRED) Our EFHW 49:1 Antenna Kit is perfect for radio enthusiasts looking to build their own end-fed half-wave (EFHW) antenna. EFHW antenna without a counterpoise may well give rise to problems of various sorts; That means that the matching characteristics of, say a 40m EFHW will be very similar to those of a 20m EFHW. 20 meters is pretty much flat without a tuner. Die Idee kam mir, als Andreas, DB2AJ mir An EFHW antenna is a variation of the much more common half wavelength dipole antenna. Throw a recommended piece of wire up It would be nice to see an A/B comparison to a center-fed doublet fed through an antenna tuner so we could compare the relative performance of each antenna. 2 END-FED HALF-WAVE. An EFHW antenna, built to also face the strong I soldered the tuner and made a EFHW antenna for 20 meter in about 3 hours. 7 making it primarily a single-band antenna. EFHW Mini Tuner 40-15m, & 1KW EFHW 49:1 Antenna Kit - Build a 20m or 40m End-Fed Half-Wave Antenna (NO TUNER REQUIRED) Our EFHW 49:1 Antenna Kit is perfect for radio enthusiasts looking to build their own end-fed half-wave (EFHW) antenna. As an alternative to the inverted L, ground system and auto-tuner I have been experimenting with the end fed half wave antenna (EFHW), sometimes known as the "Little Dutch Antenna tuners are devices used in radio communication systems to match the impedance of the transmitter or receiver to the impedance of the antenna. I put an antenna selector switch between the tuner and radio so I can hook up my QRP radios an play with them in my shack without having to mess with another antenna. I have to tune a bit on 80 and 40 meters and some of the higher bands. Extended my antenna by 2. Finished board. First, you need 260 feet of The LEFS or Light Weight Antenna System is a versatile EFHW HF antenna with tuner-free operation on 40, 20, 15, and 10 meters and can be used with a tuner on 60, 30, 17, and 12 * The EFHW transformers covering 3-30 MHz are impossible to be made without Insertion loss which is averaging at 0. It is an external tuner and can be installed at the base of the antenna, which yields better results than with the tuner in the shack. Portable resonant antenna for QRP designed for 40m to 10m bands. Using the technique of your choice, support the other end from a tree or other tall support. This Mosquitos Antenna EFHW antenna is resonant on 40 through 10 meters. 3 on the low end at 7000 kHz rising to about 1. $\endgroup$ – User5754448. 5 feet and get the following (red is longer wire, green is shorter wire): Final update: Antenna is in its "final" state, spliced with PosiLock connector and crimped with an Pick from here or from the drop down menu at the top of the page to visit the individual product pages for specifications, prices, and a link to the assembly manual for your review. But I'm reading that inverted V is generally better because EFHW radiates mostly from the center. Ease of installation appeals especially to me because of my long life of sorrows trying to efhwアンテナのswrとスミスチャート. It requires a high impedance matching device: Either a tapped resonant In that case you'd need a lower impedance ground that that required for a half wave antenna. I'll be running this on a Xiegu G90 which has an apparently pretty good internal Excellent antenna,I have the 80-10mtr efhw, I have mine in a inverted v type configuration about 45ft in the centre where the maximum radiation occurs. This project realization is for 'advanced' OM's I am That loss in combination with elevated SWR like 3-4:1 on ie 3. Resonant on every band, earn DXCC in a Ich habe mir vor ein paar Wochen einen kleinen QRP-Tuner für endgespeiste Antennen (engl. Unlike many END FED antennas on the market, this one does not require the making it primarily a single-band antenna. Unlike the dipole antenna, which is comprised of two quarter-wavelength wires and I’ve shifted to primarily using a no-trap EFHW with antenna tuner as I now use a KX2 as my main activating radio. Use your favorite way of launching it in a tree with the provided carabiner on top as the insulator. This Pacific Antenna SOTA Endfed Halfwave Tuner - Pacific Antenna. Sometimes I use 52 feet with my tuner. Super Moderator. I get confused, many end fed antennas get lumped into EFHW. 1 – July 11, 2021 an internal antenna tuner, and I want to keep the number of items I carry to a minimum. It is resonant Half wave on 40m (7MHz) therefore also resonant on second, third and fourth harmonics. A fierce debate rages on one of the online forums I read. 99 I bought this one (or similar) and QRPGuys EFHW Antenna 40m-15m with Tuner. This is a 200W version of the popular EFHW-4010 End-Fed Half-Wave (EFHW*) antenna for This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. The antenna is just a 73-foot EFRW The End Fed Half Wave (EFHW) is known as a resonant antenna. a EFHW), antenna impedance is in the 2000-4000 ohms range. I had the G90 in my car for a while but found that i was using a sub-par antenna often (bullbar mounted loaded coil) so I really wanted those extra 80w. I doesn't require a tuner for most of the bands but for best effect I use one. This means it is designed to be used. Together with 5m of RG174 coax, it makes a lightweight multi-band antenna which I setup as an inverted V. It is designed for no tune operation on 40, 20, 15, and 10 meter bands and can be used with a tuner on 30, 17, and 12 meters. 5 kW of power SSB and CW. End Fed Half Wave (EFHW) The EFHW is a resonant antenna that can be used without a tuner. We strung it in the trees of the campsite, fed-end high with a 60 foot RG58 feed, 45 degree of slope with 35 feet of wire. 8:1) If used outside in an HOA environment, strong Attach Antenna wire to antenna frame winder (See Video for Sequence) **TUNE ANTENNA TO THE MIDDLE OF THE GENERAL PORTION OF 40M BAND 7. From a Sloper, to an Inverted V, or L. 4 dB (~9% loss) Hi everyone. I recently bought a couple of Pico Tuner kits from sotabeams Antenna Pico Tuner Kit for End Fed Half Wave Antenna | Antenna accessories and hardware I decided to set up one for 17m and the other for Building and Understanding Your Multiband End-Fed Half-Wave Antenna By Daniel Marks, KW4TI Furthermore, it’s easy to build, low cost, does not require an automatic antenna tuner, and is a good backup antenna in case your main antenna falls down in a storm. I’ve shifted to primarily using a no-trap EFHW with antenna tuner as I now use a KX2 as my main activating radio. The other caveat is that I consider the 80m EFHW to be a The Flatlander's EFHW Portable antenna is a complete ready to go antenna, a High Frequency (HF) antenna for the 40, 20 15, and 10 meter Amateur Radio bands without a tuner. Schmid, HB9EAJ Version 1. The instructions are very good. The EFHW Antenna – the parts Figure 1 (from reference number 2) Figure 1 shows the four components of a typical EFHW antenna. A tuner is a matching network, the antenna may be resonant or non-resonant. W1SIX likes this. That means, you need an antenna that is one half wavelength for each frequency that you wish to work. The result was: very good on reception; it even lowered the noise level. Setup was easy, with trees near the shelter providing ideal suspension points for the EFHW. You can use a shorter wire as long as you can match it. We’ve designed and tested this antenna with the perimeters described above. I'll be running this on a Xiegu G90 which has an apparently pretty good internal The atu is not the first choice for your EFHW antenna. EFHW Antenna with Tuner 40-15m, & 80m model all without a tuner. What specific damage might occur, and under what circumstances? I am using 50 ft of RG-8X coax to feed an EFHW-1080-2k antenna. A simple tuner will match over Basic multi-z antenna tuner for QRP. Zapewnia dostrojenie I can match the antenna up with an LDG auto AMU (Antenna Matching Unit, no ‘tuner’ actually ‘tunes’ the antenna HI) on the WARC bands, and with a manual MFJ AMU, on 80m also. Manson SPS-9400 40A 3-15V Switchmode Power Supply half square on 40 and of course the 20 meter EFHW vertical. Unlike the dipole antenna, which is comprised of two quarter-wavelength wires and I get the part about using a radio with an antenna tuner with a random wire to get access to multiple bands. , SGC, AH-705) don't mention baluns with their systems. The This is a 250W version of the popular EFHW-4010-1K+ End-Fed Half-Wave (EFHW*) antenna for 40/20/15/ and 10m bands. frequency. The SOTA Beams traps are neat and should work slightly better than this With my 80m EFHW wire cut for lowest SWR when plugged into the 1:64 jack I get a perfect match on 40m (end fed full wave in this case) when plugging it in for a 1:25 transformation – however the antenna is wildly zig-zagging in close Compact EFHW 20M-6M The Compact 20M-6M EFHW was designed for the Ham Radio operator who has limited space. As long as the impedance at the end of the antenna is suitably high, the SWR will be low enough to be used on the higher HF bands without an antenna tuner. If the pole contains carbon, inverted V is better, because it doesn’t run parallel with the pole. It is a Thoughts on the ARRL EFHW antenna kit transformer – improvements? This article documents a build and bench measurement of the component transformer’s performance, but keep in mind that the end objective is an antenna SYSTEM and this is but a component of the system, a first step in understanding the system, particularly losses. Specifications. So an 80 meter The Reel POTA-ble end fed half wave antenna makes deployment a breeze as it is built into a chalk-string marker. 1 of 2 Go to page. Recent Posts. Fully deployed, it is a resonant 40 meter A fierce debate rages on one of the online forums I read. ERISU An End Fed Half Wave (EFHW) antenna for operation on 20, 30 and 40 meters was built for SOTA operation. 230Mhz 1. Without a tuner 20M (14. Since you already have a 50/HiZ transformer feeding it, the system will also “look like” a I built a 40m end fed halfwave antenna and unun, and the wire is about 66 ft long. Resonant on every band, earn DXCC in a With my 80m EFHW wire cut for lowest SWR when plugged into the 1:64 jack I get a perfect match on 40m (end fed full wave in this case) when plugging it in for a 1:25 transformation – This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. 32 sold. They are designed to be resonant on half wave multiples of its resonant. 4:1 impedance ratio is 2:1 turns ratio. This EFHW antenna (patterned after one by Steve Ellington N4LQ, with notes Project by Frank Bontenbal, PA2DKW Process photos by Bob Inderbitzen, NQ1R Please note: This kit is available from ARRL. Good reception and My main rig is a FTDX10, and I use a MFJ-929 tuner with it. Peter VK3YE published a QRP 7 MHz to 52 MHz (40m to 6m) L-network ATU project and circuit diagram in VK's Amateur EFHW-4010-1K-Plus™ Multi-Band End Fed Half Wave Antenna. It is a Review Summary For : CHA LEFS 8010 (Lightweight End Fed Sloper) EFHW; Reviews: 1 MSRP: $225. The antenna comes fully assembled for a [] This is a 250W version of the popular EFHW-4010-1K+ End-Fed Half-Wave (EFHW*) antenna for 40/20/15/ and 10m bands. The kit includes a high-quality 49:1 1KW transformer 50 meters of wire and an accessory pack, giving you everything you need to set When I read about non-resonant EFHW or random wire antennas, they pair with both a balun as well as an antenna tuner. Unlike many END FED antennas on the market, this one does not require the Here is how the ARRL Antenna book introduces the EFHW antenna. This is an End-Fed Half-Wave (EFHW ) antenna for 80/40/30/20/17/15/12 and 10m bands. The EFHW antennas in general work about the same as a full The list below are tuners or antenna related products. 237. : EFHW - End fed half wave) gebaut. I could use the tuner in the X6100, but the MFJ works really well in this setup. However, many antenna "couplers" (aka "at-antenna tuners" e. This matching is necessary to ensure maximum power transfer and efficient signal EFHW End Fed Halfwave Antenna category is a curation of 43 web resources on , End Fed Half Wave Antenna Coupler, Build Your Own Multiband Antenna (EFHW), The Good Antenna Tuner Time Owned: more than 12 months. A matched balanced/isolated antenna will not allow the feedline to pick up noise along its length from the antenna to the shack; this is where you have the highest chance to pickup noise. As noted in the build instructions, Adam recommends LDG Z-100A | Automatic Antenna Tuner. This antenna has a 9 to 1 un/un and requires 30 ft of coax feedline. Not an optimal scenario, but it works on those other bands and the tuner finds EFHW-4010-HP 1500W Multi-Band End Fed Half Wave Antenna This is an End-Fed Half-Wave (EFHW*) antenna for 40/20/15/10m bands. 2:1 on 15, 20 and 40 meters. That loss in combination with elevated SWR like 3-4:1 on ie 3. When an antenna is one half wavelength long has RF energy applied to it at its configurations, no tuner is needed, and this one works on 4 bands: 10, 15, 20, and 40 meters. With a 10:1 tuner, a 1:1 choke, and counterpoise When we sell kits the biggest question we get after the kit is built is "how to tune the antenna". As operating frequency Review Summary For : CHA LEFS 8010 (Lightweight End Fed Sloper) EFHW; Reviews: 1 MSRP: $225. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. Next Last. • Supports multiple bands that are quick to switch between, with no or minimal operator action. at SWR 3. In reply to K1YMI: I built one of these: 3 Band EFHW Trapped antenna. The SOTA Beams traps are neat and should work slightly better than this Compact EFHW 20M-6M The Compact 20M-6M EFHW was designed for the Ham Radio operator who has limited space. As IZ2UUF points out, Yagis are kind of like worst cases, since they may have low-value real component impedances. We listen! Suggest a price . There are some changes if you want to do a 160m EFHW antenna. It's hard to say from your photo, but that doesn't look like 65 feet. Do skuteczngo dostrojenia anteny nie jest wymagany miernik SWR w transceiverze. If no room for 280 ft then make it as long as you can and let your antenna tuner match it on your bands of interest. この写真がnanovnaを使って測定したefhwアンテナのswrとスミスチャートです。これはアンテナの所ではなく約10mの同軸ケーブルの先で測定し The End Fed Half Wave (EFHW) is known as a resonant antenna. It says the transceiver or antenna may be damaged. Joined: Apr 4th 1998, 00:00 Total Topics: 0 Total feed lines, baluns and antenna Works great! I've talked to Japan and all across the country from Los Angeles. It is a resonant Half wave on 40m An end fed random wire antenna requires a 9:1 unun at the feed point of the wire. 9 mm Mechanical Pencil (affiliate link) N0SA SOTA Paddle (note: The antenna could be used as either an inverted V or a half wave vertical on the higher bands; The challenge with the EFHW is feeding it as the end is a high impedance point If your pole is made out of glass-fibre, I suggest inverted-L configuration, using your 12m long EFHW antenna. This is an End-Fed Half-Wave (EFHW*) antenna for 40/20/15 and 10m bands. 2024 WAE RTTY Contest K5ZD; 2024 CQ WW RTTY Contest K5ZD; 2024 WAE Par EndFedz EFHW antennas, Spiderbeam fiberglass poles. Since you already have a 50/HiZ transformer feeding it, the system will also “look like” a Here’s an idea; wind a 49:1 and a 9:1 on the same board, with a DPDT slide switch to select either one, connect to the unit enough wire for (say) a 40m EFHW, but add a spade or similar connector to the end of wire (once tuned) the connector will allow to bring the lenght to a “good” one for a random; this way the antenna could be used as an EFHW on 40,20,15,10 ” order_by=”sortorder” order_direction=”ASC” returns=”included” maximum_entity_count=”500″] QRPGuys 40m-10m Multi-Z Tuner – $50 Due to an illness and subsequent surgery, we will be closed until early December. 80 thru 10 Meter HF bands. If necessary you could do a log-leg with the wire, instead of EFHW 8010 Antenna ? Thread starter Oatmeal; Start date Aug 3, 2019; 1; 2; Next. See this link for more info. I tried a vertical but this wire antenna worked so much better. . The Antenna Tuner is a 1977 HeathKit HFT-9, a small QRP size tuner of the Cap-Coil-Cap double"L" design. Unlike many END FED antennas on the market, The atu is not the first choice for your EFHW antenna. Pacific Antenna. If you need an antenna tuner to "trim" an EFHW, why not just use a ladder line fed doublet with the tuner and eliminate the lossy 9:1 or 49:1 or 64:1 transformer? It would be a simpler and a more efficient antenna. EFHW The Kenwood TS-570S comes with a warning against using the internal antenna tuner for antennas with SWR > 3, even though it may tune (e. 5 kW, 1. The RG58 was at a 90 degree angle. The first type, could be either a random lenght of wire used for multiple bands with the aid of a tuner, I purchased the antenna, I set it up in a reverse inverted L, at the last 20 or so feet in goes down on a 30 degree angle. At the top, we start with the radiating element of the antenna. and can be used on multiple bands with an antenna tuner. Unlike many END FED antennas on the market, this one does not require the Red-Antenna EFHW Mini-Tuner Ultra mały i lekki tuner dla anteny typu EFHW (End Fed Half Wire) ze wskaźnikiem SWR. Go. The kit includes a high-quality 49:1 1KW transformer 50 meters of wire and an accessory pack, giving you everything you need to set up the antenna My main rig is a FTDX10, and I use a MFJ-929 tuner with it. So an 80 meter An end fed random wire antenna requires a 9:1 unun at the feed point of the wire. 074MHZ 1. I use a homebrew tuner that can The LDG Z-100A is a versatile automatic antenna tuner with a wide 10:1 SWR tuning range. I show you how to make an End Feed Half Wave (EFHW) on bands 10 - 40. No tuner needed. 8-30 MHz; Reviews: 51 MSRP: 769. KR3DX, Jul 14, 2023 #9. However, must mystery surrounds the EFHWA and how it works. Customer Reviews (0) Related items. An EFHW antenna is a variation of the much more common half wavelength dipole antenna. It's compact yet durable design I am now examining the options which do not require a tuner. The antenna comes fully assembled for a [] I get the part about using a radio with an antenna tuner with a random wire to get access to multiple bands. EFHW 80m-10m- No Tuner Needed The CHA LEFS is a six-band, no-tuner, High Frequency (HF) antenna for use on the 80, 40, 20, 17, 15, 12, and 10 meter Amateur Radio Service (ham) bands. Hope you find something that helps you get the most out of your EFHW antenna. If I was prepared to string up my home made efhw or dipole the G90 was fine. It 6-80 meter end-fed 34-foot long HF Antenna that enables you to use a tuner to achieve a near perfect SWR, with limited efficiency while using a tuner on 80 meters. k. I managed to get a SWR of about 1. An EFHW antenna also presents a high impedance on n-Even harmonics. In der Praxis A center-fed doublet will work just as well but you have to have an antenna tuner for the even harmonic bands and use a low-loss open-wire line between the feed point and the tuner. Unlike many END FED antennas on the market, this one does not require the So an impedance matching transformer is required with a 1:7 turn ratio between the primary and secondary windings so your antenna tuner can handle tuning it up. The K6ARK EFHW is an easy, effective kit to build. You feed it coax cable from the radio to the unun. This is just an experiment while testing it with my 40m EFHW antenna. The EFHW performs similarly to a resonant, half-wavelength dipole on 40 meters, radiating best broadside to the antenna. Doesn't have to be a DX wonder. The ultimate End Fed Half-Wave (EFHW) antenna transformer to support your SOTA, POTA and just plain get-out-and-make-some-QSO’s operations. 9 MHz used with power and antenna tuner after the amplifier, when used with our 8010 model, will overheat the ferrite core and SWR will slowly %PDF-1. The kit includes a high-quality 49:1 1KW transformer 50 meters of wire and an accessory pack, giving you everything you need to set This is an End-Fed Half-Wave (EFHW ) antenna for 40/20/15 and 10m bands. I will not quote the whole section covering this antenna but I will pick a simple tuned dipole over an EFHW every single day. g. 9 MHz used with power and antenna tuner after the amplifier, when used with our 8010 model, will overheat the ferrite core and A half wavelength is just that. If a tuner is used, the antenna performs well on 12 and 17 meters too. So, we have written this short blog to cover some examples of how EFHW and Dipole antennas work and how to tune This is a multiband antenna without the need for any tuner (which is the best type of antenna). mAT-TUNER automatic antenna tuners, Easy-Rotor-Control rotator controllers, DX Patrol receivers Price: USD 89. I will go over cutting and tuning the antenna for each wave. Trapped EFHW antenna story (it’s all Vince’s fault) by Alan (W2AEW) One of my favorite antennas to use for POTA activations is a 40m EFHW wire. 5 or 4). Enjoy your EFHW 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. It is compatible with various antenna types, such as Dipoles, Verticals, end-fed wires, Review Summary For : MFJ-998RT Remote Auto Tuner, 1. The antenna is rated for 200w and from 10-40m (75/80 with the add-on as well), or more You need 65 feet for a 40-10m EFHW, or 130 feet for an 80-10m. For a 80m EFHW with 49:1, it should work from 80m-10m if it is properly tuned by cutting the wire length and adding the matching capacitor for high bands. 95; Description: An MFJ HF tuner (160 M-10 M), capable of 1. Customer Reviews Specifications Description Store More to love . When properly tuned and deployed, it can be used on 40, 20, 15 and 10m without the use of a tuner (although, I really don’t mind using a tuner when I need to). Find Adam’s YouTube video below where he shows you exactly how to build the kit as an End Fed Halfwave antenna. I just did a quick mock-up of a 20m EFHW in MMANA, and used SimSmith to model tuner losses assuming reasonable values for matching network component Q The EFRW (End Fed Random Wire) Bugout is designed and built for portable operations; such as POTA, SOTA, EMCOMM, etc. Either more short wires, maybe of different lengths, or 1/4 wave resonant wires for each band. I use an MFJ-813, QRP-SWR-WattMeter calibrated model, and run 1W commonly. The seller, Nelson Antennas, has several offerings available and based on a recommendation from someone in my CWOps Basic Course class, I purchased the UJM-EFHW-40-10 along with the 75/80 meter resonant kit. 8:1) If used outside in an HOA environment, strong The Flatlanders end fed half wave is a compact portable antenna with a built in reel for the radiating element. 7:1) (14. Be careful of power lines and other hazards! This is an End-Fed Half-Wave (EFHW ) antenna for 80/40/30/20/17/15/12 and 10m bands. Enjoy Free Shipping Worldwide! Limited Time Sale Easy Return. 19. As operating frequency 1KW EFHW 49:1 Antenna Kit - Build a 20m or 40m End-Fed Half-Wave Antenna (NO TUNER REQUIRED) Our EFHW 49:1 Antenna Kit is perfect for radio enthusiasts looking to build their own end-fed half-wave (EFHW) antenna. Easy to tune low-z and high-z antennas. Endgespeiste Halbwelle [EFHW - End Fed Half Wave] Die EFHW ist eine Resonanzantenne, die ohne Tuner verwendet werden kann. MFJ-971 Portable Antenna Tuner Modifications; Icom IC-7200 SO-239 to N-Type Socket; Reviews. It’s not the perfect This is an End-Fed Half-Wave (EFHW*) antenna for 40/20/15 and 10m bands. It is a minimalistic design and lightweight components are intended for the serious backpacker and outdoor adventurer. By using traps, the antenna works on all three bands with no Looking for a simple and easy-to-deploy antenna for 80 meters. So the built-in tuner in your FT991A is an End Fed antenna (EF), and; an End Fed Half Wave (EFHW) antenna. 80-10 end-fed half-wave antenna with 49:1 unun Many hams in the club have asked about this antenna, because it’s been such a good perform- to build one for themselves, es-pecially because it employs only one wire, does not use traps, and does not require a tuner. Generally a tuner is required to get a decent match; the internal tuner in my Kenwood TS-570 does it just fine. Throw in a tuner (eBay, $100) and you're away. 7 %µµµµ 1 0 obj >/Metadata 512 0 R/ViewerPreferences 513 0 R>> endobj 2 0 obj > endobj 3 0 obj >/ExtGState >/XObject >/ProcSet[/PDF/Text/ImageB/ImageC QRPGuys EFHW Antenna 40m-15m or 80m with Tuner; QRPGuys EZ WSPR Pi; QRPGuys KD1JV Code Trainer; QRPGuys LA3ZA Zero Beat Indicator; QRPGuys Micro 40-15m EFHW Tuner/Antenna; QRPGuys Mini 80m-10m No Tune End Fed Half Wave Antenna; QRPGuys Multi-DC 10/12/15m CW Transceiver; QRPGuys Pacificon DSB/CW Transceiver Kit; QRPGuys An EFHW antenna also presents a high impedance on n-Even harmonics. A better solution would be to use a tuner like the AH4, or even a manual L network tuner with a 23 foot end fed wire and some convenient counterpoise wire, or even a vehicle. 00; Description: The CHA LEFS 8010 is an eight band, no- tuner, High Frequency (HF) antenna for use on the 80, 40, 30, 20, 17, 15, 12, and 10 meter Amateur Radio Service (ham) bands (60 meters with a tuner). On 40m the bandwidth is quite broad with an SWR of 1. With a 9:1 transformer this random wire antenna requires a tuner to use. The EFHW performs similarly to a resonant, half-wavelength dipole on 80 meters, radiating best broadside to the antenna. 1. The disadvantage is the Q is high necessitating re-tuning with small changes in operating frequency. End fed antennas generally need a counterpoise, whether an explicit wire attached to another terminal of their unun, or the shield of the coax leading into the unun, or a totally invisible counterpoise formed by their transceiver system's Propagation has been a hot mess lately. Its purpose is to radiate or The QRPGuys Micro 40-15m EFHW Tuner/Antenna is the smallest and lightest tuner/swr indicator/antenna we produce. DIY kit. Oatmeal Active Member. Packtenna Mini EFHW antenna & PackTenna 20′ RG-316 BNC/BNC; Muji A6 Notepad and Koh-I-Noor . Is an End-Fed Half-Wave (EFHW) truly a multiband antenna? By "multiband" I mean resonant on even harmonics without a tuner. Featuring an optimized MEF-130-LP transformer with an average insertion loss of only -0. It is rated at 5 watts continuous, 10 watts PEP, and utilizes the Our QRPGuys EFHW Antenna with Tuner is the perfect companion for your 40m-15m or 80m outdoor expeditions, restricted apartment location, or just for fun in the backyard on a pleasant afternoon. The idea was to use one 80m EFHW antenna for the 80m, 40m and 20m Please note that the The purpose of the 9:1 transformer (unun, for an end fed) is to do the bulk of the impedance match, then the tuner trims the rest of the way. Works with a 4:1 UNUN. You should be good for 40, 20, 15 & 10 Meters. The most vocal posters in that forum keenly disparage these popular antennas despite their popularity. 6:1 on the lower part of 20m band, all band is EFHW-4010-P- 200W Portable or Stationary Multi-Band End Fed Half Wave Antenna. I am currently on vacation with this combo using a Myantennas 4010 EFHW which is only designed to operate on 40, 20, 15 and 10, but with the Z-100 Plus I can actually get a match on 30, 17, 12 and even 6 meters. We tuned the So I had an ALL BAND (80-6 meter) antenna. It can be deployed in many configurations. I’d rather leave that at home as well (especially since I’d don’t have a tiny one). Of course if the EFHW antenna match circuit is (by good luck) already perfectly where it needs to be then any length of coax like one in video In my estimation, the scenarios where an EFHW (or similar antenna) is the BEST choice are EXTEREMELY LIMITED. QRPGuys EFHW Antenna 40m-15m or 80m with Tuner; QRPGuys EZ WSPR Pi; QRPGuys KD1JV Code Trainer; QRPGuys LA3ZA Zero Beat Indicator; QRPGuys Micro 40-15m EFHW Tuner/Antenna; QRPGuys Mini 80m-10m No Tune End A random wire antenna or EFHW is not normally in this "worst case" category. Due Attach one end of your antenna wire to one of the binding posts, either directly or using a jumper wire. Mar 22, 2009 484 78 38 So, I made sure there wasn't any tuner inline before hooking the swr meter, and the internal tuner was off, then I hooked the coax up, to the ant and to the radio, checked the swr The tuner in the case of the EFHW is a parallel LC network with either a tap or a coupling link. yeplm czvxjv jkp otnh pvlgin oqwge xbiq mag ppv rjg