Efhw tuner kit. Weighs ~6oz when complete.

Efhw tuner kit. com contributor and supporter, Jonathan (KM4CFT) has designed and started producing ultra-compact end-fed antenna kits (eBay affiliate link). cz produced a kit for the design and after being out of stock for a while they are now available again. It includes an aluminum case and internal LED SWR indicator. 2 for any portion of the band. 2m) long NO TUNER is needed! Perfect for ALE HFLink, ARES, EMCOM … Resonant on 40/20/15/ and 10M 250W-ICAS max. You can buy a set of 4 off of QRP Kits but they are pretty pricy. Description EFHW-4010-1K-Plus™ Multi-Band End Fed Half Wave Antenna This is an End-Fed Half-Wave (EFHW*) antenna for 40/20/15 and 10m bands. EFHW-8010-LP Multiband End Fed Half Wave Antenna 130 Feet (~39. correct toroid mix for top band. Between the gator clips sit one 100 ohm resistor and two 1. A level of 500-600 watts is the maximum with a further reduction on any band measuring above 3:1. It's now available for sale on their site. #16 AWG XLPE wire with end insulator TUNER needed Pole installation plate and hardware are NOT included, you can get them at this link QRPLabs@groups. The original assembly instructions are available from the manufacturer, HF Kits. 8 ounces Very easy to assemble - all connections on the circuit board Covers all bands from 40 to 15 meters Internal resistive SWR bridge with LED indicator Simply adjust tuning until the LED dims 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. They are designed to be resonant on half wave multiples of its resonant frequency. Josef Fuchs, OE1JF. 80 thru 10 Meter HF bands. We chose a 250-watt rated antenna so you can comfortably transmit the full The Kit is quite straightforward to construct, so mainly pictures are supplied showing how the mechanical parts are assembled. Antenna works without needing a tuner on 10M, 15M, 20M & 40M with SWR ≤ 2:1 Easy to build! Just wind the toroid, solder a few joints, connect the wire, and you are on the air. Rated for 100 watts SSB/CW and 50 watts digital. Turn your EFHW tuner knob back and forth to find the position that gives the loudest response of static. So, we have written this short blog to cover some examples of how EFHW and Dipole antennas work and how to tune them. 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. Jan 18, 2020 · In the SPRAT 179 (Summer 2019) article describing their Peregrino (Pilgrim) transceiver, Joan EA3FXF and Eduardo EA3GHS recommend the use of an End Fed Half Wave (EFHW) antenna. May 1, 2021 · To help understand the strengths and weaknesses of the End Fed Half Wave (EFHW) antenna, in this article, I will try to present, the design attributes, characteristics, behavior, and the resulting overall performance that one might expect from an EFHW antenna. As I planned my trip to the Dominican Republic with a uBITX, I had this antenna system idea in mind. So an 80 meter EFHW is (theoretically) resonant on the 80, 40, 20, and 10 meter bands. You are now tuned somewhat, but we will now use the tuning feature on the EFHW tuner. Key Features The radiating element is approximately 65 feet long, equivalent to a half-wave on 40 meters. This is a $25 kit that will tame the high impedance of an End-Fed antenna. Mar 29, 2018 · I have been keeping my eyes open for a small cw-only radio to base a running-ascent kit on for when the wx warms up a bit. (you do not have to have a PayPal account to pay for items using a credit card) NOTE Aug 21, 2024 · When we sell kits the biggest question we get after the kit is built is "how to tune the antenna". From a Sloper, to an Inverted V, or L. Key Features About EFHW Antennas The EFHW antenna is one of amateur radio’s oldest antenna designs. 6 Ohms and -58. 4. Place a small amount of solder on 11 votes, 47 comments. For a QRP non-resonant wire (somewhat imprecisely called “random wire”) you at least need something like the QRP Guys multi-tuner, which is $50 as a kit. I am looking forward to the build and getting it on the air. We do not sell on AliExpress, eBay, Walmart, or Amazon, even if it uses our name and logo. ), no tuner is needed, and this one works on 4 bands: 10, 15, 20, and 40 meters. These are the same parts we use in the antennas we have for sale. For this I have a nanoVNA running 10 segment sweeps on the UnUn with two gator clips on each end. 4 x 2. This is a great option for radios that have a built-in ATU or an external Antenna Tuner. e. There's also an easy to follow assembly video. Congratulations this completes assembly of your Pacific Antenna EFHW Tuner! 2020-09-27 When I posted about this 80 meter modification to my QRPGuys EFHW antenna one fellow responded saying he too tried this but after playing with it a while tossed out the coil and simply used his tuner to tune the 40-10 meter antenna on 80 meters and used that. May 9, 2025 · 3. Jul 13, 2023 · I show you how to make an End Feed Half Wave (EFHW) on bands 10 - 40. What is an EFHW An EFHW stands for End-Fed-Half-Wave antenna, which is an antenna that’s made of a wire that’s half the wavelength of the lowest band it is designed to work on. EFHW Mini Tuner 40-15m, & 80m model Multi Z Tuner 40m-10m […] Apr 8, 2013 · When Steve originally designed the ATS series of rigs he also produced a matching tuner kit. 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. Jul 17, 2025 · Ideal for portable operation such as SOTA, POTA, backpacking and travel Supporting Files and Documents EFHW Antenna Tuner Manual (7/10/2025) Ordering Information To order this kit, use the buttons below. No tuner required. The QRPGuys 40m-10m UnUnTenna is a compact portable wire antenna for backyard or portable SOTA use. Dec 31, 2020 · Background When I started in SOTA I used for some time different antennas: resonant quarter wave verticals, non resonant random length verticals, dipoles, doublets with tuner, and finally the EFHW (resonant end fed half wave). Sep 8, 2025 · A compact and light weight tuner for endfed halfwave antennas 85 x 60 x 30mm - 3. The EFHW can be resonated very well and the SWR bridge works reliably. At 1800 kHz, SWR is 8 with a return loss of 2. Join the “CP” pads on the top of the board with a small blob of solder. It uses an integral 9:1 voltage balun that matches your unbalanced 50 ohm impedance input to a 450 ohm impedance unbalanced long wire. Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. I'll also show an example of why an antenna should be isolated from your coax. Oct 15, 2020 · Manager Reviews Home Reviews For: ARRL EFHW 40m, 20m, 15m and 10m antenna kit, made by HFkits Category: Antennas: HF: Verticals; Wire; Loop eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. Oct 30, 2024 · Discover the EFHW-7510-2K+ Antenna with 2000W power, no tuner needed. Several weeks ago, Doug Hendricks from QRPGuys handed me a prototype kit to try. The QRPGuys Mini 80m-10m No-Tune End Fed Half Wave Antenna. Our Reel POTA-ble EFHW antenna is the perfect lightweight, easy to setup antenna for portable situations. I will go over cutting and tuning the antenna for each wave. Shop HF and VHF Portable Antennas and Accessories for Amateur Radio/Ham Radio with confidence. Using this tuner, a portable station needs no ground radials and little or no feedline to achieve excellent results. This works especially well when paired with a QRP rig with built in tuner or with an ATU such as the Elecraft T1 or ATU-10. Sep 2, 2011 · QRP End Fed Tuner Kit A few months ago KI6J mentioned he was going to do a kit of his end fed tuner that he designed for SOTA use and it came last week. It is up to the constructor to research EFHW Antennas on recommended Antenna wire lengths and installation for best performance. The kit contains four trap pcbs, two antenna end connector pcb’s, four T37-6 toroids, two 68pF-500V capacitors, two 150pF-500V capacitors, 8′ of 26awg magnet wire, and enough 1/2″ poly shrink wrap to cover all four traps. The unit has a built in SWR indicator LED and Jan 6, 2024 · I made a 20/30/40m trapped EFHF antenna using QRP Guys trap kits tuned to 20m & 30m along with their EFHW Mini-tuner (which has a variable capacitor across the secondary). 9 phase. The QRPGuys Mini No Tune End Fed Half Wave Antenna is designed to be used without a tuner and give an SWR of ≤1. its very cheap . It is rated at 5 watts continuous, 10 watts PEP, and utilizes the N7VE led SWR indicator and attaches directly to the transceiver’s female BNC connector. Later the antenna got name “Fuchs Antenna. With this, you can deploy a half-wavelength of wir… Jan 19, 2024 · Our SOTA tuner is an Endfed Half Wave Antenna Tuner covering the 40-15 meter bands. The type and design of the antenna is based on any number of parameters: specifically, the frequency or band of frequencies, location, directivity, and intended power range. We have confidence in the quality of our designs and in the performance of our components. It incorporates the N7VE led SWR indicator and has a board mounted female BNC for connection to Jul 17, 2025 · Pacific Antenna Warranty Policy Pacific Antenna strives to offer the best quality, affordable, antennas and kits available in today's market and make your kit project a complete success. The QRPGuys Micro 40-15m EFHW Tuner/Antenna is the smallest and lightest tuner/swr indicator/antenna we produce. That means that for an The kit in the bag consists of the radio, an Electaft T1 tuner attached to the top of the radio velcro like straps, a 4. Portable EFHW Antenna with Tuner 40-15m, & 80m model Portable CLV Vertical Antenna 40m-10m Portable UnUnTenna 40m-10m Portable UnUnTenna Plus 40m-10m Portable Tri-Band Vertical Antenna 40/30/20m Portable No Tune End Fed Half Wave Antenna 80-10m Portable Multi-Band End Fed Antenna 40/30/20m Wire Antenna Trap Kit Mini UnUnTenna 40-10m EFHW-4010-LP Multiband End Fed Half Wave Antenna 63 Feet (~19. The EFHW was the better choice after trying all these different antennas for several reasons: Feeding the antenna at the lower end reduced the required run of coaxial This product is sold only on this website. Dummy Load Surface Mount Version This is our Surface Mount version of the dummy load. I believe this is the kit; I bought it through ARRL: HF Kits website. New EFHW 40m-15m 5W Mini Tuner antenna DIY Kit And finished Board Designed by Maker go in China This is a hand made ultra portable antenna for use with portable radio. W6DPS Rating: 2012-04-10 Solid, easy to build tuner kit Time Owned: 0 to 3 months. io Topics EFHW from ARRLDate 1 - 20 of 76 I recently tried assembling a EFHW kit, and some problems came up in testing. The EFHW is somewhat directional, with radiation mostly running in-line with the antenna. This allows operation on 40 meters, 20 meters, 15 meters, and 10 meters without the need for a tuner. QRP Guys' tests have been favorable for ≤2. Here are Works brilliantly. This antenna operates across four bands – 40, 20, 15, and 10 meters – in the Amateur Radio Service (ham), expanding to seven bands wi I made a End Fed Half Wave Antenna! 😜 You're the tuner to my antenna. It will easily handle 10 watts. A typical 49:1 transformer has 2 turns for L1 and 14 turns for L2. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. Mar 12, 2023 · How I found the best antenna for my SOTA/POTA activations by Thomas (DM1TBE) Intro Until January this year I had a German “Klasse E” / CEPT-novice amateur radio license (equivalent to the US Genera… Jul 17, 2025 · Pacific Antenna Warranty Policy Pacific Antenna strives to offer the best quality, affordable, antennas and kits available in today's market and make your kit project a complete success. This EFHW antenna (patterned after one by Steve Ellington N4LQ, with notes by K1RF), if built carefully, will serve you for many years, and at up to 200 watts. We’ve designed and tested this antenna with the perimeters described above. 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. There's also an easy to follow assembly video. USERS GUIDE. 5 x 25mm screw. The advantage of an EFHW is the ease of construction, it’s versatility in a variety of installation configurations (sloping, horizontal, L, etc. I used the instructions some weeks ago to built the same tuner out of stuff I had in the junkbox. Please let me know if you are interested in a different configuration. The counterpoise eyelet hook is used to attach the Autotransformer to a support mast. Antenna works without needing a tuner on 10M, 15M, 20M & 40M with SWR ≤ 2:1 Easy to build! Just wind the toroid, solder a few joints, connect the wire, and you are on the air. Aug 29, 2012 · I'd like to go back to the EFHW and I've always wanted to build one of those fancy EFHW tuners so I set off to do that yesterday. We’ll You build this kit to feed your EFHW (End Fed Half wave) or EFRW (End Fed random Wire) antenna depending on how you build it (instructions for both ways build in manual). Mar 1, 2021 · When I had an 817, I used the QRPGuys No-Tune EFHW mentioned above or the QRPKits SOTA EFHW Tuner with 70-some feet of 26awg wire on a chalk reel marked at the appropriate lengths for the tuner. The antennas are a 40-10 EFHW made with the kit from KM4ACK and a 29' end fed based on the K6ARK mini 9:1 unun. It is a favorite of Summits-On-The-Air (SOTA) activators and ARES/RACES that roll it up into a backpack or toss it in an emergency go kit. In keeping with this tradition, we will replace any electronic component, for the life of the product, for any reason Sep 18, 2021 · That is part of the source for the EFHW’s widespread reputation for being “finicky”, “won’t load”, “position sensitive”, “still needs a tuner”, “RF in the shack”, “so I returned it”, etc. Find great deals on SOTABEAMS for Pico Tuner - End-Fed Half-wave Tuner Kit. ARRL sells a little EFHW kit, or at least ostensibly they sell one - it's usually out of stock… This is only avaiable as a Kit BUILD INSTRUCTIONS The most popular backpack or SOTA HF antenna must be the Halfwave. Sep 18, 2021 · That is part of the source for the EFHW’s widespread reputation for being “finicky”, “won’t load”, “position sensitive”, “still needs a tuner”, “RF in the shack”, “so I returned it”, etc. The heart and engineering of its design is in its 49:1 impedance matching transformer, or unun (connects an unbalanced feed line to an unbalanced radiating element,) where much of this This is a hand made EFHW Antenna with a built in 49:1 Transformer. This takes the randomness out of The “standard” transformation ratios for an EFHW antenna are: 49:1, 64:1 and 81:1. Nov 5, 2023 · Long time QRPer. 1 SWR). The autotuners in the Elecraft KX-2, KX-3, Icom IC-703, and our manual Multi Z ARRL EFHW KIT Displaying 1-4 of 4 Displaying 1-4 of 4 Technology >> Antennas, feed lines, baluns and antenna tuners Back to Top Please note: This kit is available from ARRL. The low profile makes for a small package enabling great portability and quick deployment. The benefit of this design is where the transformer is isolated from the feed line. We have selected very efficient Fair-Rite cores for the HF bands offering exception performance on bands from 80m to 10m. In keeping with this tradition, we will replace any electronic component, for the life of the product, for any reason End Fed Half Wave (EFHW) antenna kit with SO239 QTH kit. My KX2 would probably work, but the idea of it jiggling around in a running rucksack didn’t sit well. 7^2 = 49. Find the “C1 pads on the bottom side of the board. Weighs ~6oz when complete. Tuner and Radio NOT included. This QRP Portable No Tune End Fed Half Wave Antenna is a versatile, single-band 80m-10m wire antenna, designed for easy setup in various configurations like inverted-V, horizontal, or vertical radiators. Find the small capacitor and carefully remove it from the package. Measurements taken with RigExpert RR-55 Zoom. It consists of a main board with tuner and SWR indicator, two trap pcb’s and an end wire support. I can look at offering different May 9, 2025 · A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Ultimate Portability Optimized Performance Bringing portable ham radio antennas and amateur radio accessories to the next level. End-Fed Horizontal Wires (EFHW) cover multiple bands with-out traps, stubs, or resonators. Along the way I'll put some drawings in the Blog and make some general comments about antennas. This isn’t completely true though since the bands aren’t exactly multiples of The list below are tuners or antenna related products. Install the knob on the polyvaricon shaft using the supplied 2. (you do not have to have a PayPal account to pay for items using a credit card) NOTE 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. Weighs just 3. 40M 20M 15M and 10M - No Tuner Needed Introducing the Chameleon Antenna Lightweight End Fed Sloper (LEFS) 4010: a versatile HF antenna designed to enhance your outdoor radio experiences. For example, if my half wave wire happens to have 3,000 ohms feedpoint resistance look at my possibilities. This antenna will require the use of a tuner. And 6 days ago · The Flatlander's EFHW Portable antenna is a complete High Frequency (HF) antenna for the 40, 20 15, and 10 meter Amateur Radio bands without a tuner. DIY End Fed Half Wave Antenna Kit for 10-15-20-40-Meters ARRL and HF Kits offer a 4-band antenna kit: End Fed Half Wavelength Antenna The advantage of an EFHW is the ease of construction, it’s versatility in a variety of installation configurations, no tuner is needed, and this one works on 4 bands: 10, 15, 20, and 40 meters. Key Features I'm building the QRPGuys EFHW Mini Tuner for 20m, and the specifications on the board says the long of the wires: 31'5" (9. 2m) long NO TUNER is needed! Perfect for ALE HFLink, ARES, EMCOM … Resonant on 80/40/30/20/17/15/12 and 10M 250W-ICAS max. Jul 17, 2025 · EFHW (aka SOTA) Tuner This is our new and redesigned SOTA tuner. Jul 24, 2024 · Ham Radio Dude’s portable end fed half wave antenna, the Dudetenna, features a substantial toroid and reinforced radiating wire for 100 watt operation in both digital and sideband modes. Setup in any end fed configuration you like. Step 2: Install the capacitor. QRPGuys Mini No Tune End Fed Half Wave Antenna is designed as a mini highly portable 80m-10m end fed half wave wire antenna, easily set up as an inverted V, horizontal, sloper, or in the Aug 21, 2012 · So i looked up the instructions for the kit online and copied the schematic, Already had most of the parts in the junk box, Had to shell out £6 quid for the parts i needed, The tuner is working nicely, Tunes from 15m - 40m Still waiting on some resistors for the SWR bridge, Will update when i have the SWR Bridge built EFHW Build Step 1: Solder the Counterpoise Jumper. 80m can be optimized for the upper or lower portion of the band. I noticed that the QRP guys No-Tuner EFHW has a bunch of versions out there. ” It was patented in 1928, published in QST magazine and subsequently forgotten for many years. Due to the high impedance, a matching network is required to transform the impedance to around 50 Ohms which works with most Jun 11, 2022 · Just got my K6ARK End Fed Half Wave KIT for the minimalist QRP operator. Covering 40, 20, 15, and 10m without the need for a tuner. Click the links below for each kit's page, which includes design features, specifications, documentation, and ordering information. Kits and Build Options with Instruction Links End Fed Half Wave (EFHW) The EFHW is a resonant antenna that can be used without a tuner. This unit will allow you to run an end fed dipole (1 single wire) on almost any band with just a single wire and radio+tuner. The antenna is fed at the end of the wire which has a high impedance of around 2,500 Ohms. I have built two of these and am very happy with them. Apr 2, 2016 · In this video, I review the QRPGuys. Digital modes, FT8 100W Stealth #16 AWG black wire See the instruction manual here EFHW -MANUAL Let’s start with the obvious: The purpose of an antenna at the amateur radio station is to transmit and receive radio signals. Hans, stock the K6ARK tuner kit for QMX etc?1 - 3 of 3 1 This project describes an ARDUINO based automatic antenna tuner, for an end fed half wave (EFHW) antenna, dual band for 20 & 40m. We would like to show you a description here but the site won’t allow us. After I built my own tiny EFHW-tuner, I ordered the SOTAbeams kit in the UK, which arrived 7 days after my order here in Germany. Key Features The QRPGuys Multi-Tuner is a Z-match design that will match a wide range of coax fed, long wire, and balanced line antennas, like high-impedance, low-loss UHF twinlead or ladder line for 40m-10m. Ideal for base station radios, USA-made, and versatile for all HF bands. 0 SWR or better for the entire band, except 80m. 2k ohm resistors which my Fluke tells me This 10m/20m End Fed Half Wave comes with the wire element cut to the 20m band and it will work on 10m great. I've seen others EFHW without counterpoise, for example the No Tune EFHW 80m-10m by QRPGuys. May 5, 2015 · Description EFHW-8010-1K-Plus™ Multi-Band End Fed Half Wave Antenna This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. These turns ratios are for Ferrite Toroids (FT) and Binoculars. 43 $75. Aug 28, 2025 · The Flatlander QRP EFHW 20 Watt, 20 Meter QRP Antenna Kit has a 64:1 unun and 33' 6” 26ga wire for use on the 20 meter band. 5 dB Insertion loss 3-30MHz! This is an End-Fed Half-Wave (EFHW*) antenna for 75/40/30/20/17/15/12 and 10m bands. How this works is really quite simple. This product is sold only on this website. 1 In. For those that were not able to do so, this… One thing about the EFHW tuner is that it's a fixed ratio transformer, so it might not be able achieve 1:1 (50 ohm match) with all half wave wires. EFHW stands for “End Fed Half wave” and was first introduced way back in 1927 by the Austrian radio amateur, Dr. #cheesyhampickuplines Jun 19, 2019 · Yeah, that title is a mouthful! And for something with such a long name, it sure is a tiny little kit. Key Features May 3, 2025 · An EFHW antenna presents a very high impedance, typically around 2500 Ohms—far beyond the 50 Ohms your transceiver expects. EFHW Antenna with Tuner 40-15m, & 80m model Multi Z Tuner 40m-10m Jan 19, 2024 · Our SOTA tuner is an Endfed Half Wave Antenna Tuner covering the 40-15 meter bands. It features a high impedance half-wave wire matched to a 50-ohm feed point via an integrated impedance matching toroidal transformer, rated for 10 watts. 5 MHz). 14 is divisible by 2 7 times. 5MHz 5W EFHW 80m Mini Tuner antenna KIT finished product $56. Above 1800 kHz, the first SWR dip is 2760 (1. Digital modes, FT8 100W Stealth #16 AWG black wire See the instruction manual here EFHW -MANUAL The End Fed Antenna: Killer or Compromise? by John Reisenauer, Jr. The following attempts to simplify the complex “end effects” involved with these systems. The reality is that some antenna trickery is typically required to optimize the tuning of those additional bands. Where it differs from other kits on the market is in its inclusion of Common Mode Choke on the PCB, just before the EFHW Transformer. Nov 7, 2023 · Adam’s 40m EFHW design is excellent, and I wanted to stay with his build design, so I concluded that I needed to put a 30m link in mine EFHW to cover 40m, 30m and 20m without the use of a tuner. 31m) for the counterpoise wire. I have actually also used (successfully) an 80m EFHW (40m long) with centre elevated in an inverted Vee at 12m and had a ‘long’ piece (shorter than 40m, on ground) of coax back to 1:1 choke in shack. Using a T-network design and controlled by a BASIC Stamp BS2sx microcontroller, the EZ-Tuner will match at least a 16:1 VSWR for either unbalanced or balanced transmission lines. Below 1800 kHz, SWR is higher. It is rated for 100 watts digital, CW, and SSB. Its design makes it resonant on harmonics of the fundamental frequency! End Fed Half Wave (EFHW) antenna kit with build in Common Mode Choke SO239 kit is designed for the enthusiast of the End Fed Half Wave antenna. 24 Free shipping 200W 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. I am still very satisfied with it. Anyway, today I scored an ATS-4, which was high on my list. KL7JR This article is of a "homebrew" nature which includes a "review" of my experience using a 10-40m HEARC (Honolulu Emergency ARC) end fed matchbox antenna installed in a unique way from an RV park. I needed a little bit more than 60 minutes for everything including testing. With wire, without, 20m, 40m, etc. For me, definitely 5 stars! Get notified when the kit is back in stockKit includes everything you need to build a 49:1 end fed half wave antenna. Can I use the EFHW-8010 model on the SSB part of band 3. For QRP operation, what are people's feelings about this design vs an antenna tuner and some sort of dipole, etc? I love the idea of a super compact kit, but I also am not sure the compromises make sense. If you want a simple 40/30/20/17/15/10m EFHW, I go with a 40m EFHW EFLW-3K End Fed Long Wire Antenna Covers 160-6m 3kW-ICAS maximum. We continue our antenna offerings with this single band, 80m-10m end fed half wave wire antenna. The missing link has always been the polyvaricon - a small variable capacitor often found in old transistor radios and the like. Use your favorite way of launching it in a tree with the provided carabiner on top as the insulator. I am mainly using one iwth a 40 meter rockmite, and built it into the same case. If you want just a 40/30/17 antenna, a trap EFHW is a good option. Hendricks 40m – 15m SOTA EFHW Tuner First, familiarize yourself with the parts and check for all the components. In keeping with this tradition, we will replace any electronic component, for the life of the product, for any reason QRPGuys DSB Digital Transceiver Kit 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 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. Oct 31, 2023 · End Fed Half Wave The End Fed Half Wave (EFHW) is known as a resonant antenna. All proceeds fund our annual Conference, OzarkCon. Kit includes everything you need to build a 49:1 end fed half wave antenna. Then we will put the antenna to the test. 6 to 2:5 without the tuner. The other popular way of multi-banding is to insert links in the antenna so that you can select a half-wave on two bands. 25dB Transformation ratio 75:1 (3750:50 Ohms) NO TUNER needed Aug 5, 2025 · Four State Kit Index The Four State QRP Group is pleased to offer these quality kits to the QRP community. You can either buy the complete Install the knob on the polyvaricon shaft using the supplied 2. With my QDX inbound, I'm working on putting together my kit for POTA/SOTA QRP. I work mostly CW and the CW key is by N6ARA. With this type of antenna, you want to prevent the antenna from being resonant on any particular band. Their circuit incorporates an EFHW tuner and an SWR indicator. Congratulations this completes assembly of your Pacific Antenna EFHW Tuner! This Mosquitos Antenna EFHW antenna is resonant on 40 through 10 meters. To help new hams prepare for the exciting world of HF opening up during Cycle 25, ARRL has partnered with HF Kits to bring you this easy-to-build four-band antenna kit: an end-fed half-wave (EFHW) antenna. Description EFHW-7510-2K-Plus, 2000W Multi-Band End Fed Half Wave Antenna Improved version of the EFHW-7510-2K, now with three large cores, 3-inch diameter, featuring just 0. Worked surprisingly well actually. I use an EFHW for 40, 30 & 20m for QRP. Tuners 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. With a 10:1 tuner, a 1:1 choke, and counterpoise (see below), it is usable on the 30, 17, and 12 meter bands. Now to think about an antenna. See the seller's listing for full details. You can accomplish the same transformation with L1 of 3 and L2 of 21. 6. End-fed radiators have the unique quality of resonating on the 1/2-wave fundamental frequency plus odd/even harmonics above! May 6, 2021 · EFHW antennas are actually quite efficient in terms of power delivered into the antenna wire from the matching transformer so long as chosen wire lengths are such that the antenna is naturally resonant - i. My transformation ratios are (32/4)^ 2 or 64 and (32/6)^2 or 28. 5 SWR) then again at 3560 (1. This is my first time making an UnUn and EFHW kit. . 50W SSB ~ 20W Jan 11, 2024 · The real question is, "what is the rest of your system?" What kind of radio are you using, and do you have/plan to have an antenna tuner? Like Brian said, a 17m and 30m are going to play well together on an EFHW unless it's built for 80m (multiples of 3. Note that the knob is keyed to fit onto the top profile of the polyvaricon and you may need to rotate it back and forth until it seats before tighteningn the screw to secure it. This little ATU will allow you to match a halfwave wire to your radio , will work with halfwave wires for 40 to 15m. 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. This paper discusses some of the more important aspects of the End Fed Half Wave (EFHW End Fed Half Wave Tuner Kit The originalSOTA tuner developed and kitted by KI6J This kit was designed for use by travelers, packers, and other ultra/P amateur operators needing a lightweight, easy to deploy antenna system. No tuner needed. Due to Jul 17, 2025 · Pacific Antenna Warranty Policy Pacific Antenna strives to offer the best quality, affordable, antennas and kits available in today's market and make your kit project a complete success. MEF-107-2K-Plus Multiband EFHW Antenna Transformer, Covers 4 Bands 160/80/60/40m / wire not included / One End Insulator included To make a 160/80M antenna you can get a wire assembly of 260 feet at this link High Power capability – 2kW ICAS LOW insertion loss ~0. 5Ah Bioenno battery, 35' of rg316 coax and two antennas. Congratulations this completes assembly of your Pacific Antenna EFHW Tuner! Let's Build an EFHW Antenna If you attended Field Day 2022, you may have been one of the students that learned how to build an end fed half wave Antenna and actually got to build one and take it home. This means it is designed to be used without an antenna tuner. This is incredible for POTA, SOTA and other portable/field operations. This might help several operators to make informed choices, and also avoid various pitfalls that many amateur radio operators encounter Install the knob on the polyvaricon shaft using the supplied 2. Very easy to assemble and works excellently. Inspect closely to confirm the solder has bridged across the gap between the pads. This is already my second kit. These were produced for a while by Hendricks but then they ‘updated’ it and it’s not an “Altoids” kit any more. Here are some key advantages: Simple Construction and Easy Installation:… 5 days ago · A small-sized portable antenna tuner for the 40 meter band end-fed half wave antenna based on a toroid core and a variable capacitor by VK5ZVS G0KYA EFHW HF antenna Ultra-light and versatile, the K6ARK Antenna Kit provides the parts for three possible antenna matching unit/balun builds – an End Fed Halfwave (EFHW), End Fed Random Wire (EFRW), or a 1:1 balun. 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. It can be deployed in many configurations. It is a resonant Half wave on 40m (7MHz) therefore also resonant on second, third, and fourth harmonics. Many/most of our summits around here are tree covered. No separate feeder is needed. To bridge this gap, a 49:1 impedance transformer is used. 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 out of the box. NO TUNER NEEDED Rated for 50 W CW/SSB 100% US sourced parts: Fair-Rite, Amphenol, Essex Wire, Cornell Dubilier, TotalBoat resins. Sep 3, 2025 · The EZ-Tuner The "EZ-Tuner" is a homebrew automatic legal-limit antenna tuner that covers all amateur HF bands from 160-10 meters. But since it’s non-resonant at 30m I needed to add a tuner & traps. com End-Fed Half-Wave Mini Tuner. Easy to build and use. Pleas Dec 6, 2021 · Like this: Spread the love Tweet cheap antenna diy antenna elecraft kx3 end fed half wave half wave antenna icom IC-705 lab599 Discovery tx-500 mcHF multi band antenna no antenna tuner QCX qrp rlecraft kx2 user xiegu G90 xiegu x5105 xiegu x6100 yaesu ft-818 May 6, 2021 · QRPGuys Mini No Tune End Fed Half Wave Antenna cover 80m - 10m, and can handle up to 10 watts. That's way too much for a tuner to handle right?. Aug 29, 2025 · This unit is very efficient from 160m and well beyond 10m. His end-fed antennas are incredibly small, thus perfect for portable operations. It includes an aluminum case and internal SWR indicator. The housing is 3D printed from ASA, durable and UV resistant. Just a length of wire, but it gives us problems as its a very high impedance load for our radio. Sep 17, 2016 · I used the sunday last week to built the SOTAbeams Mountain Tuner kit for 40-17m. I say unique because it was about the only way I could do it without everyone seeing it! The HEARC matchbox antennas are Reviews Home Reviews For: EFHW Tuner \"SOTA Tuner\" Category: QRP Accessories eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. no tuner needed - on harmonically related frequencies. Any you see there are counterfeit and contain very substandard toroids. 18 dB, 86. With my tuner enabled, SWR is too high for me to transmit effectively. A simple tuner will match over something more than an octave (2 x frequency) so a 40m EFHW can be used on 20m. An EFHW antenna is a highly versatile solution for multiband HF operation. 4 x 1. The antenna is built to accept the OPTIONAL 40m EFHW add on wire element sold separately. The good news is that Ondra OK1CDJ at Hamshop. 58m) for the antenna wire and 17'5" (5. Today, amateur radio Oct 18, 2022 · What are the benefits of an EFHW antenna for 10-12 meters? End-Fed Half-Wave (EFHW) antennas have several benefits, especially when used for the 11-meter band (27 MHz), which is popular among CB (Citizens Band) radio users and amateur radio operators. An EFHW antenna for 40, 20 and maybe 15m might also do the job without a tuner. I built the second in the case offered by Better QRP for general QRP use, and it also performs well. 200W 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. 7-4MHz with high power and tuner? We would like to show you a description here but the site won’t allow us. It is designed as a highly portable wire antenna, easily set up as an inverted V, horizontal You build this kit to feed your EFHW (End Fed Half wave) or EFRW (End Fed random Wire) antenna depending on how you build it (instructions for both ways build in manual) . This is a RESONANT antenna. If the transformer is used with an external tuner in conjunction with a single wire antenna typically 130-135 feet in length, power should be reduced on those bands that show an SWR above 1. sctbfzly htfgc cpuvz woyid wld fpfma dvgjq ipai hxjfmpv sazyf