Qrp antenna traps In keeping with this tradition, we will replace any electronic component, for the life of the product, for any reason Here's how to make them. Technical support via email is the only service available until then. Oct 20, 2016 · Link End Fed Half Wave Antenna and Tuner for SOTA QRP Multi-band HF EFHW antenna for SOTA Post updated 29 September 2017. Jan 12, 2025 · Multi-Band Trap QRP AntennasNow that I have a MTR_V2 and am going backpacking this summer, I want a small, light 40/30/20 end fed antenna for SOAT work. The board allows easy soldering of the inductor, SMD capacitor (0805 or 0603) and antenna wires and also provides strain relief holes for the wires. com Page Maintained by: dean@alpinesoft. The EFRW is a non-resonant antenna intended for use with an antenna transmatch unit (ATU), also known as a “tuner. However, the design can easily be used with torroids. We have confidence in the quality of our designs and in the performance of our components. You can compress or spread the windings on the toroid for an ideal resonance. [Please note that Amazon affiliate links support QRPer. 8% positive We would like to show you a description here but the site won’t allow us. The MO-3 connects directly to the 3/8-24 on the tripod. Lower frequencies will pass the trap effectively making the antenna bigger. Each kit Find Kelemen Trap Dipole Antennas and get Free Shipping on Most Orders Over $99 at DX Engineering! Kelemen Trap Dipole Antennas are high-quality, heavy-duty pre-assembled wire antennas intended for permanent installations. A complete kit to build an antenna trap that can be used in efficient multi-band antennas such as dipoles or end-fed half wave antennas (EFHW). As with any single ended antenna, a ground connection is required, but the radials (on or in ground) don't have to be resonant or straight and as few as 8 will give good results, as the radiation resistance will be much greater than ground resistance. 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. Your feed line is essentially the counterpoise, so a separate one is not needed. . LINKS: It was about a 10-minute ragchew. I started as I do with all of my kit builds by inventorying and arranging all of the parts. It consists of a main board with tuner and SWR indicator, two trap pcb’s and an end wire support. … 73, Andrew VK1AD Feb 10, 2022 · Adam joins me to talk about his antennas. 8% positive QRPGuys Tuners or Antenna products QRPGuys Wire Antenna Trap Kit Retired kit documentation Retired Products Services Si5351A/MS5351M 160m-10m VFO Kit Simple Lowpass CW SCAF Filter Single Lever Keyer/Paddle Single Lever Mini Paddle Single Lever Paddle w/Base SMT Digital Dial/Frequency Counter SO8 to DIP8 Adapter Test Test Equipment Building the QRPGuys 40-30-20 M End Fed Antenna The QRPGuys multiband end fed antenna meets my definition of an easy build with only 16 solder-in components on the main tuner circuit board and the two traps. I employed a T50-6 toroid and a high-voltage SMD capacitor for thi SB-40 40m QRP CW Tranceiver The SB-40 (Single Board 40) transceiver is my version of the Micromountaineer by Wes Hayward. In keeping with this tradition, we will replace any electronic component, for the life of the product, for any reason Abstract A coaxial-cable trap dipole antenna installed in the attic provides a surprisingly effective solution to HF operation on the 10, 15, 20, 30, 40, and 80 meter amateur bands at a QTH with restrictive covenants that prohibit outside antennas. Dec 29, 2021 · Santa delivered a new uBITX V6 to my door this Christmas! I have a few days off work, so I decided to assemble the radio right away. Now, I know some of you are saying, “Well Teri, there would be no contest!” Yes, however, in the interest of learning first-hand, I headed to K-0161, Wheeler National Wildlife Refuge while Dec 10, 2018 · Description The Pacific Antenna lightweight dual band, trap dipole kit provides operation on both 20 and 40M bands. You can see a video of how to use the MFJ analyzer to determine the resonant frequency of the traps as you build them. If you would like to build a trapped dipole antenna, please order 2 kits. Also, there are places to add multiple Feb 27, 2018 · Pacific Antenna has added a new trap dipole design to their lineup. It is designed as a highly portable wire antenna, easily set up as an inverted V, horizontal, sloper, or in the case of higher frequencies, a vertical radiator. This one is an extremely cost-effective, lightweight and easy to build QRP version from DL1DN of QRP Lifestyle on YouTube. The trap should be resonant just below the 20m band. Each kit includes parts to build two (2) traps QRP Antenna Traps These traps were specifically desiged to use mini-ductor type coils. Use as a dipole, inverted V or upright V antenna configuration. By using traps, the antenna works on all three bands with no operator interaction. For example, a 40 and 20 metre trapped dipole would have traps installed at the 20 metre points which would prevent the 14Mhz band, effectively shortening the antenna. W9TH. Each kit includes parts Jun 20, 2024 · I had this node working on the bench, now its time to assemble it into a finished unit. It is resonant on 20m without the added 40m coil, but requires a tuner for the other bands. Jul 7, 2020 · Sotabeams QRP Pico Traps Traps used are Sotabeams Pico Traps. I'm thinking what I really want is traps as 20M and 30M. 2020-01-04 Well after spending most of the morning at a hamfest I finally got to work trimming the QRPKITS 40-20 meter dual band trap dipole antenna. You might want to start out by building a two-band trap dipole to experiment and I would recommend getting yourself a decent GDO to build/resonate the traps. Aug 31, 2021 · QRP Antenna Traps These traps were specifically desiged to use mini-ductor type coils. I also need to unwind one turn for each inductor to get in resonant. Feb 21, 2025 · The Pacific Antenna Dual Band Trap Dipole kit provides a lightweight, portable trap dipole. 25") for making QRP HF antenna traps. I am looking forward to the build and getting it on the air. The described antenna is based on the widely used end-fed half-wave (EFHW) dipole antenna design, improved for a bigger variety of bands, maximum efficiency and optimized for portable QRP communication. com Copyright © 2001-2023 Oct 30, 2022 · Many thanks to Sam Duwe (WN5C) who shares the following guest post: A (surprisingly good) tabletop HF antenna by Sam Duwe, WN5C I recently built a tabletop QRP HF antenna for 17 and 20 meters, in t… Mar 26, 2020 · Scrap the Traps 80-Meter EFHW Experiment Created by N2RRA on 2020-03-26 Jul 26, 2022 · A Great Homebrew Vertical Antenna by Steve (KM4FLF/VA3FLF) Last spring, I was going through my many boxes of ham “stuff” looking for items to sell at our club tail gate sale. Jun 6, 2024 · NanoVNA - Trap made with thin coax The following example shows a resonant frequency of 13. com at no cost to you MicroMountaineer 40m QRP CW Transceiver This is my version of the famous MicroMountaineer by Wes Hayward. If you would like to share your field kit with the QRPer community, read this post. Traps for 40 / 80 meter band Dipole or inverted V tuned as a pair A pair of tuned traps for making 80 / 40 meter band dipole or inverted V 250 watts versionHam Radio . Choose from a wide range of antenna types, including single-band, dual-band, multi-band, vertical, trap vertical, wire, HF antennas. 9uH for 14. I have inserted two additional links for coverage on 17m and 30m. Title: QST Amateur Radio QRP Operation Antenna Traps Spiral Delay Line ++ 11 1972 Check out our antenna traps selection for the very best in unique or custom, handmade pieces from our gadgets shops. All for Amateur Radio operating. If for some reason I have a trap fail, I installed a bullet connector right before the first trap. You can see in each photo; how strain relief works. Shop HF and VHF Portable Antennas and Accessories for Amateur Radio/Ham Radio with confidence. The lengths of the wires weren't as expected, and adjusting wire lengths on lower bands (beyond a trap) impacted 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 resonance point is at the begining of the band you are trying to trap. Kit includes parts to build TWO traps: QTY 1 - 20 meter trap and QTY 1 - 30 meter trap for use with an EFHW antenna. I use EFHW antennas deployed in slope and have fishing rods of 6m and 9m as mastil. This PCB is a replacement for the proto-board that he uses in the video and should make assembly Antennas for QRP As a confirmed QRPer, I have given a lot of thought to the subject of antennas My conclusions should be of interest to those planning QRP operations, as well as those of us on limited budgets In the first place, despite the obvious advantages, I am going to rule out expensive beam and tower combinations. Jun 20, 2024 · I had this node working on the bench, now its time to assemble it into a finished unit. Traps will make the overall Oct 15, 2024 · Description The Pacific Antenna lightweight dual band, trap dipole kit provides operation on both 17 and 30M bands. 830MHz, just below 14MHz, the beginning of the 20m band. Jun 13, 2023 · The Dipole Does It for Wheeler NWR (K-0161) by Teri (KO4WFP) After my last activation, I was hankering to try the AX1 and Pacific Antenna 2040 trap dipole during the same activation for a comparison. Nov 7, 2018 · Description The Pacific Antenna lightweight dual band, trap dipole kit provides operation on both 17 and 30M bands. On the NanoVNA display, we can see a resonant frequency of 13. 5 grams per trap) and small, which helps quick deployment of the antenna. Thus, I can disconnect the 30 and 40 meter portions of the antenna and have a basic resonant 20M EFHW. 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). Oct 25, 2025 · Kit includes parts to build TWO traps: QTY 1 - 20 meter trap and QTY 1 - 30 meter trap for use with an EFHW antenna. Nearly everyone that I met in the CW Academy classes, plus my Elmer, were all involved in QRP portable ops as well. That decision turned out to be the first step in a year QRPGuys Tuners or Antenna products QRPGuys Wire Antenna Trap Kit Retired kit documentation Retired Products Services Si5351A/MS5351M 160m-10m VFO Kit Simple Lowpass CW SCAF Filter Single Lever Keyer/Paddle Single Lever Mini Paddle Single Lever Paddle w/Base SMT Digital Dial/Frequency Counter SO8 to DIP8 Adapter Test Test Equipment Find SOTAbeams HF Antenna Trap Kits Antenna trap Wire Antenna Component Type and get Free Shipping on Most Orders Over $99 at DX Engineering! SOTABEAM HF Antenna Trap Kits are a clever design with flexible mounting arrangements to make them easy to build and use. My conclusions should be of interest to those planning QRP operations, as well as those of us on limited budgets. 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 10, 2024 · With the traps built and tuned, the next step would be to build and tune the antenna itself. QST Amateur Radio QRP Operation Antenna Traps Spiral Delay Line ++ 11 1972 Find many great new & used options and get the best deals for QST Amateur Radio QRP Operation Antenna Traps Spiral Delay Line ++ 11 1972 at the best online prices at eBay! Free shipping for many products! Manager Reviews Home Reviews For: Unadilla \"KW\" Antenna Traps 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. Apr 28, 2017 · Above you see the components and a completed trap using a toroid inductor and an SMD capacitor. I built this in high school, probably around 1976. Jul 10, 2024 · With the traps built and tuned, the next step would be to build and tune the antenna itself. Shortened Antennas A full-sized vertical antenna usually has got a length of a quarter wavelength. I am not sure where I obtained them, but I decided they were keepers. I did some experiments with various table top and tripod mounted "portable" antennas prior to field day, thinking that 'if it works for them it should work for me' and when the band was really open they did work, but everyone wanted to keep QSO's short, a clear indication Sep 29, 2023 · The stock design is sublime. Available in 20+40M and 17+30M versions Approximately 30% shorter than a full size dipole Weighs approximately 4 ounces. Find 24885 qrp antenna 3D models for 3D printing, CNC and design. Jul 1, 2013 · The tuning of the traps is somewhat critical, so you do need test equipment for this project. One of the reasons for this is that most designs are for QRP antennas and not made to handle more than 5 – 10 W of power. Very small traps, such as used for portable QRP station antennas use iron powder toroids for the inductors. They feature special traps made with of PTFE (Teflon®) insulated coax for high Q and low losses, offer high performance multi-band operations—and are excellent shortened Traps for 40 / 80 meter band Dipole or inverted V tuned as a pair A pair of tuned traps for making 80 / 40 meter band dipole or inverted V 250 watts versionHam Radio . His full article can be read on the July 2017 issue of The QRP Quarterly. 50MHz for the 20/40 meter antenna trap. The circuit is identical to the original, and can be found HERE Cannot technically comment on traps dipoles versus fan dipoles except to say that, while the former are kind of sexy, they seem to be less lossy. We will be open for orders and shipping when you see the PayPal buttons re-appear. A common theme among Tiny PCB (1"x0. Does it make sense to put a RF choke on the line for this case of use or it isn’t a really advantage for QRP? If afirmative; do you make it Trap dipole antenna for 20 and 40 meters Similar to what I had built two years ago, I thought I’d present another dual-band HF dipole antenna, for 20 meters and 40 meters, but this time using a single wire pair, instead of two pairs of elements. 20 meter trap from a QRP antenna More measurements EFHW Antenna 40m-15m, w/tuner – $40 EFHW Antenna 80m only, w/tuner – $40 ***Please verify your address with PayPal before ordering. We would like to show you a description here but the site won’t allow us. 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 days ago · This multiband antenna 10-80 meters is a home made project by I1BAY. Article about my primary SOTA antenna which is a multi-band (20/30/40) inverted-vee trapped dipole with over 100 successful activations. Please see the excellent YouTube video by Adam K6ARK: HF Antenna Micro-Traps - DIY Build Project. The first step is painting the enclose “Sunburst Yellow”. QRP AntennasQRP Antenna Traps Jun 11, 2022 · Just got my K6ARK End Fed Half Wave KIT for the minimalist QRP operator. Multiple Antennas The GABIL tripod is versatile in that I can operate with several different vertical antennas and even use a long wire connected to a binding post. May 8, 2025 · Coaxial-Cable Trap Dipole An Attic Coaxial-Cable trap dipole for 10, 15, 20, 30, 40, and 80 meters VK5AH -HF 4 Bander dipole A multiband 80-40-20-15 meters dipole wire antenna that can be extended to cover 160 meters too. NanoVNA - 20/40 meter QRP antenna trap Conclusion The information above might sound familiar to seasoned ham radio operators, but it's a great guide for anyone new to using an antenna tuner or a NanoVNA. The DS1 Antenna is a small, portable, vertical antenna system for 40m thru 10m. This is a kit and needs assembly. Sep 9, 2021 · 20m Antenna for QCX-Mini1 - 20 of 43 1 2 3 Jun 23, 2020 · Description Our Pacific Antenna lightweight dual band, trap dipole kit provides operation on both 20 and 40M bands. With the 40m coil it is only resonant on 40m. A trapped dipole is a dipole with blocking filters fitted at the operating wavelengths. Jan 19, 2024 · Pacific Antenna. I was able to find the time this weekend to do just that, and make a video of the process. What is it? A kit based on a custom PCB board to build your QRP EFHW UnUn. Due to customer requests, QRPGuys is offering a universal lightweight wire trap kit for those who want to experiment with their own traps for wire antennas. Also, there are places to add multiple When designing the trap resonance, I used a reactance of 180 ohms for the inductor and capacitor (as stated in the ARRL antena Book) for optimum performance. Traps are done with coax cable turns, dimensions are in the attached schema. QRPGuys Mini No Tune End Fed Half Wave Antenna is designed as a mini highly portable 80m-10m end fed half wave wire antenna, easily set up as an inverted V, horizontal, sloper, or in the case of higher frequencies, a vertical radiator. EFHW Mini Tuner 40-15m, & 80m model Multi Z Tuner 40m-10m […] Find SOTAbeams Pico Trap Kits and get Free Shipping on Most Orders Over $99 at DX Engineering! SOTAbeams Pico Trap Kits are a pair of miniature antenna traps that you can build to create a super lightweight portable multiband HF wire antenna. It was built to take along camping so I would only have to take & put up one antenna instead of two. Page last updated: 01/19/2024, 19:23:34 QRPKITS. The dual band dipole is approx. Sep 28, 2017 · For my handheld QRP transceiver I have developed a rod antenna for outdoor use when cycling or hiking. The 20/40m trap dipole that I use frequently has been joined by a 17/30m version. 5 metres to 6. Shop Wire Antenna Building Components at DX Engineering. A great way to get maximum performance from one antenna over For Oggies worldwide! Get a tee shirt with I love ham radio! on the front and Ask me about ham radio! on the back, both with the Oggie logo! Custom designed graphic is printed in vivid color and " Antennas for QRP As a confirmed QRPer, I have given a lot of thought to the subject of antennas. Oct 25, 2019 · Author Sean Kutzko, KX9X, operating QRP at the base of Devil’s Tower National Monument in Wyoming for the Parks on the Air (POTA) program. Your feed line is essentially the counterpoise, so a separate one is not necessary if you want to keep weight Nov 28, 2019 · PS: Many other antenna topics are covered in Hand-carried QRP Antennas. A big thanks to Freddie Mac – Your Ham Radio Crusader for his instructional videos on Find SOTAbeams HF Antenna Trap Kits Cable Strain Relief Included and get Free Shipping on Most Orders Over $99 at DX Engineering! SOTABEAM HF Antenna Trap Kits are a clever design with flexible mounting arrangements to make them easy to build and use. Rotatable Dipoles Portable, and shortened with loading coils rotatable dipoles for 6 meters, 20 meters and multibands. Since learning code on my own wasn’t working, I enrolled in CW Academy classes. I also built a back-up emergency antenna into the design. Toroid holder builds the end-feed QRP antenna trap, combining with a capacitor. 8, 3. There are two compartments, one for the Raspberry Pi and one for the radio. Nov 7, 2023 · The Best Mountain Topper Antenna (And a modification that makes it a little better) by Dick (K7ULM) When I decided to pursue HF radio, I had already decided to learn Morse Code. 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. ” This design is particularly well-suited for QRP radios such as the Elecraft KX2 or KX3 and the Xiegu X5105. How he came with idea for antennas, and other aspects of his antennas. Early attempts to build miniature trapped antennas for use on SOTA (Summits on The Air) all "worked," but with frustrations to tune. HF QRP Antenna, Pico Trap Kit, Pair, 10W, Choose 10-25 MHz by Construction, Pack of Parts to Build 2 Traps, Online Instructions, Kit Part Number: SBM-PITK-100 5. A big thanks to Freddie Mac – Your Ham Radio Crusader for his instructional videos on QST Amateur Radio QRP Operation Antenna Traps Spiral Delay Line ++ 11 1972 The Jumping Frog (132115) 99. Oct 15, 2024 · Description Our Pacific Antenna lightweight dual band, trap dipole kit provides operation on both 20 and 40M bands. The schematics, board layout and parts list can be found HERE Jul 25, 2024 · I want to make a feed line for QRP (SOTA, POTA,…) HF bands 40m-10m, CW mode mainly. The antenna consists of a regular 40 meter dipole using aRead More QRP Antenna Traps These traps were specifically desiged to use mini-ductor type coils. Now, I know some of you are saying, “Well Teri, there would be no contest!” Yes, however, in the interest of learning first-hand, I headed to K-0161, Wheeler National Wildlife Refuge while Portable Antennas, Accessories and more. The End Fed Halfwave is the ultimate portable resonant antenna, but if you’ve got a QRP rig with a tuner (KX2, KX3, or X5105) the End Fed Random Wire with 9:1 unun gives you all the bands at the push of a button. QST Amateur Radio QRP Operation Antenna Traps Spiral Delay Line ++ 11 1972 The Jumping Frog (132115) 99. QRPGuys Tuners or Antenna products QRPGuys Wire Antenna Trap Kit Retired kit documentation Retired Products Services Si5351A/MS5351M 160m-10m VFO Kit Simple Lowpass CW SCAF Filter Single Lever Keyer/Paddle Single Lever Mini Paddle Single Lever Paddle w/Base SMT Digital Dial/Frequency Counter SO8 to DIP8 Adapter Test Test Equipment An End Fed Half Wave (EFHW) antenna for operation on 20, 30 and 40 meters was built for SOTA operation. 0 out of 5 stars ( 1 ) This document is about a multi-band shortwave (HF) amateur radio wire antenna that does not need an antenna tuner. 31, 2021 For the past five years, I have been operating the lower bands (3 Multi-Band Trap QRP AntennasNow that I have a MTR_V2 and am going backpacking this summer, I want a small, light 40/30/20 end fed antenna for SOAT work. com@gmail. Each kit includes May 28, 2023 · The Dipole Does It for Wheeler NWR (K-0161) by Teri (KO4WFP) After my last activation, I was hankering to try the AX1 and Pacific Antenna 2040 trap dipole during the same activation for a comparison. It has a one watt crystal controlled transmitter. 14 MHz trap 21 MHz trap Setting up the antenna (wire) sections This was the most time consuming part. This is Find great deals on SOTABEAMS for HF Antenna Traps Kit (pair). com QRP before QRP was cool…Home Projects Jun 23, 2020 · Description Our Pacific Antenna lightweight dual band, trap dipole kit provides operation on both 20 and 40M bands. You … Find SOTAbeams HF Antenna Trap Kits and get Free Shipping on Most Orders Over $99 at DX Engineering! SOTABEAM HF Antenna Trap Kits are a clever design with flexible mounting arrangements to make them easy to build and use. 40ft long, and requires no antenna… Mar 15, 2019 · Other trap designs use coaxial cable for both the inductor and capacitor. My EFHW Trap antenna was constructed for 40m – 30m – 20m. These thoughtful touches seemed to perfect the antenna. Jun 12, 2024 · Small trap using thin coax In the example below, we measure a trap for a QRP trap dipole 40/20 meters. COM Contact:: qrpkits. Or, if you’re a dipole fan and want to eek out every fractional dB of efficiency, maybe you want that 1:1 unun for the dipole. Having been bit by the QRP bug a few months ago, I decided to try a QRP Field Day. Theoretical inductance is 1. Aug 9, 2024 · Build: Trapped Vertical for 10, 15 and 20 Meters (QRP) Let's build a no-tune, no-adjustment antenna for use with my QDX and x6100. This is my favorite color for homebrew radio projects. It is designed for any outdoor portable applications where weight, portability, and ease of setup is a prime concern. Designed for QRP portable operations at 10 watts or less, Pico Traps allow the hobbyist to make their own two or three band dipole or end-fed halfwave Tiny Antenna Trap Kit (6m - 80m) from HB9ZHK on TindieWhat is it? A complete kit to build an antenna trap that can be used in efficient multi-band antennas such as dipoles or end-fed half wave antennas (EFHW). These traps will work with my Ultimate Ultralight EFHW ( ) or just about any QRP end-fed halfwave antenna, and you could even build pairs to use with a dipole. Let talk about Antenna on \\o/ Tank Ultimate Portability Optimized Performance Bringing portable ham radio antennas and amateur radio accessories to the next level. 5 and 7 MHz trap dipole * NU3E attic multiband trap dipole Find SOTAbeams HF Antenna Trap Kits Sold as a pair. Wind it like the graphic, tin the leads and when bent down the leads will align with the pcb. Traps will make the overall For a 20m trap use a T37-6 (yellow) core wound with 25 turns for “L” as shown below, with C, 68pF capacitor. The list below are tuners or antenna related products. I have changed the counterpoise wire from 1. They are available in two power levels, 100 watt traps are listed here as SBM-HFAT-101 and 20 watt traps are SBM-HFAT-102. I wanted an antenna that would not Sep 2, 2020 · We would like to show you a description here but the site won’t allow us. A 63' end-fed wire with a pluggable link at the 30meter point would work 40/30/20, but it's long and I would have to lower it to change the pluggable link. Ended up removing several inches from the 20 meter legs and adding about a foot to the 40 meter extensions. QST Amateur Radio QRP Operation Antenna Traps Spiral Delay Line ++ 11 1972 The Jumping Frog (132922) 99. An older MFJ antenna analyzer is suitable though, and are usually easy to borrow if you don't already own one yourself, which is what I did. You'll find ideas in the links below. Free Shipping - SOTAbeams HF Antenna Trap Kits with qualifying orders of $99. [Katie Allen, WY7YL, photo] May 31, 2021 · Building the W8NX Short Trap Dipole Filed in Antennas on May. Oct 25, 2025 · Antenna traps are fantastic way to make a multi-band antenna with one wire for use with radios like the LNR MTR3b, MTR4b, Venus SW-3b, CFT1, and QRPLabs QMX (and many more!). We continue our antenna offerings with this single band, 80m-10m end fed half wave wire antenna. I came across a couple of Hustler SM Series Resonators (20 /40 Meters) that I had acquired. A couple of months ago, I ran across a design rated at 100 W. As they all do it took several hours and many trips to the back yard. SOTAbeams Pico Trap Kits are a pair of miniature antenna traps that you can build to create a super lightweight portable multiband HF wire antenna. Tim’s field kit is now featured on our Field Kit Gallery page. Wire Antennas UK receive antenna systems feature the best designs available for HF DXing, as well as for “AM DXing” and for the Short Wave Listening bands (SWL). My primary antenna system is the Hustler Resonators and M0-3 base. The circuit is essentially the same, with the addition of a VFO for receive. In this article I’ll first give the reader some basic considerations on shortened antennas and afterwards the pracital consequences of these. But doing so requires me to make for each dipole side what’s known as a trap, which is nothing more than a tank circuit (capacitor and inductor in Jan 24, 2024 · So there you have it folks -323g of portable HF kit everything included! Check out Tim’s YouTube page or his Microlight QRP Traps on Etsy for your next QRP outing. Designed for QRP portable operations at 10 watts or less, Pico Traps allow the hobbyist to make their own two or three band dipole or end-fed halfwave. Reviews For: Pacific Antenna Dual Band 20m and 40m Trap Dipole Category: Antennas: HF Portable (not mobile) eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. The cooling fan on the larger box (the Pi box) not only cools the Raspberry Pi, but also cools the radio using a baffle between the two boxes. 000MHz. With permission from Joe Everhart, (N2CX), we have adapted his 40-30-20m portable vertical antenna design using switched toroids for the base loading inductance into a lightweight antenna for an easy outdoor setup. The kit contains all you need to build your own tiny EFHW antenna (PCB, FT50-43 toroid, 100pF capacitor, BNC connector and magnet wire for the toroid). The trap is rated for 20 watts, hence usable for QRP and slightly above. QRP Antennas Uncategorized New Electronics Workbench Jun 23, 2020 · Description Our Pacific Antenna lightweight dual band, trap dipole kit provides operation on both 20 and 40M bands. * Online trap dipole coil calculator * W8NX 1. There is a mounting hole for use with a nylon screw to hold the torroid in place. Handles power up to 100W of RF. Find great deals on SOTABEAMS for Pico Traps Kit (pair). Has been used for SOTA activations with great results. In the first place, despite the obvious advantages, I am going to rule out expensive beam and tower combinations. If you take into consideration the radiating element and something to wind it on there isn't that much difference in weight or convenience between the K6ARK and the qrp guys antenna but the K6ARK is clearly the best looking! During the QSOs, I had the antenna connected to my x5105 via a 30 ft rg316 coax. I’m thinking 7m lenght (23’) is enough for my use, coaxial RG-174 cable. Now, I know some of you are saying, “Well Teri, there would be no contest!” Yes, however, in the interest of learning first-hand, I headed to K-0161, Wheeler National Wildlife Refuge while . *** We are closing due to illness. Five watts into a simple inverted Vee antenna yielded nearly 40 CW QSOs in an hour’s operating on 40 and 20 meters, logging stations as far east as Connecticut and Florida. QRP Antenna Traps These traps were specifically desiged to use mini-ductor type coils. The results were a little disappointing. Dec 6, 2021 · Hello Operators Today’s topic is an end fed half wave antennas. An Improved Multiband Trap Dipole Antenna This improved multiband trap dipole introduces a new trap design and a change in trap location. Quantity and get Free Shipping on Most Orders Over $99 at DX Engineering! SOTABEAM HF Antenna Trap Kits are a clever design with flexible mounting arrangements to make them easy to build and use. 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. It took me a two hours to build, unfortunately I lost the small SMD 100pF capacitor so I used bigger ones. DX Dual Dipole Two dipoles fed from the same coaxial This is a simple dipole built for two-band operation that I made for portable use with my 20 and 40 meter QRP rigs. The toroid takes center stage upfront, while the capacitor resides discreetly at the rear. After acquiring a MTR3b for SOTA activations I decided I needed a different antenna than the End Fed Random Wire (EFRW) or the speaker cable 20 meter dipole I use with my KX2. Available in electronic and paperback form (some countries) this well-reviewed book is a popular read amongst hams who go portable. The QRPGuys Micro 40-15m EFHW Tuner/Antenna is the smallest and lightest tuner/swr indicator/antenna we produce. Alternatively, James at QRP Kits offers a decent and inexpensive dual band 40/20 kit that Check out our hf antenna traps selection for the very best in unique or custom, handmade pieces from our gadgets shops. 8% positive Aug 26, 2021 · W9TH_Workbench Download QRP Accesories Uncategorized QRP Guys End Fed Half Wave Antenna – Part 3 QRP Antenna Traps QRPGuys Tuners or Antenna products QRPGuys Wire Antenna Trap Kit Retired kit documentation Retired Products Services Si5351A/MS5351M 160m-10m VFO Kit Simple Lowpass CW SCAF Filter Single Lever Keyer/Paddle Single Lever Mini Paddle Single Lever Paddle w/Base SMT Digital Dial/Frequency Counter SO8 to DIP8 Adapter Test Test Equipment What is it? A kit based on a custom PCB board to build your QRP EFHW UnUn. The trap is very lightweight (2. Nov 13, 2012 · November 13, 2012 By Dan KB6NU 45 Comments I’ve posted about end-fed, half-wave antennas before, but until this weekend, I’d never built one. Ideal for travel, backpacking, emergency, ARES/RACES, and SOTA operation. I had mini-ductor coil stock on hand, so I wanted a design that would be produce a higher Q trap than ones made with torroids.