Homebrew 20m mobile antenna. It's a challenge getting good efficiency.

Homebrew 20m mobile antenna All mobile HF antennas, with the exception of 12 and 10 meters where you can put a full quarter-wave whip on the car, are a compromise. Home Brew 20-80 Mag Loop 4. I just built a homebrew antenna that consists of a full-length quarter-wave vertical sized for 20m, with a "top hat" consisting of a Hustler VP-1 and trio of Hustler mobile resonators (RM-80S, RM-40, and a RM-20 with extra-long whip repurposed to do 30m instead). Article by M0DGQ. OK, so the Buddipole is not home-brew, but it is very versatile, like the Tinkertoys or Erector Set of antennas, and completely portable. Someone stated in another post that the delta loop is mostly a single band antenna. Plenty of dipole calculators online, both the wire and center can be picked up cheaply. The general formula for making ¼wl wire antenna elements is 300 ÷ average frequency in MHz ÷ 4 × 0. 2 Element Yagi for 50 Mhz » Homebrew (135) HF Antennas (76) Raspberry Pi (1) UHF Antenna (14) VHF Antennas (36) Photos (4) Short News (4) Video (4) Multiband Center-Loaded Off-Center-Fed Dipole (CL-OCFD) antenna that work on 80m 40m 30m 20m 15m 10m. Three of those were at 5w. So I preferred homebrew antennas from the start. you could try doing a rotatable dipole too. Because this is a half-wave antenna, it will This is an easy to build and easy to carry and packable shortened 20 thru 40 meter vertical antenna. 5mm² speaker cable I am very happy with this antenna – it is very compact when fold together and also quite compact when hung from on a mast. Antenna Projects for the 10 MHz - 30 meter Band category is a curation of 23 web resources on , Bobtail Curtain for 30 meters, The flower pot antenna, Portable Magnetic Loop Antenna Version 2. 00. for the center of Category Archives: Homebrew 2 Meter mobile antenna Posted on April 25, 2020 Posted in VHF Antennas. 6m/10m Dual Band mobile whip; 6m 1/2 wave Melrose Vertical; VK5AH – HF 4 Bander Antenna Construction Telescopic Masts for Homebrew Vertical Antenna . 2m of wire and for 80m I used 41m. Wire Antenna Trap Kit. Rand on An effective 10-20m DX antenna for deed Diamond Antenna BB7V Multi-Band Vertical Antennas BB7V Antenna, Vertical, HF, Multi-Band, Resonant, 250 W, Non-tilt Bracket Mount, 22. He survived the big storm twice, but nothing happened. Learning antenna Homebrew G5RV; 40 meter mini Moxon Antenna; EH Antenna for 10 meter; VK5AH invented a new antenna, better than the mobile whip. 5 Element Full Size Yagi For 20 Meters Iw5edi Simone Ham Radio. If you enjoy “messing about with antennas” and you are prepared to improvise a little, you may find this homebrew project interesting. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Compact 20m Yagi; J-vertical Antenna for 10 meters band; 6m/10m Dual Band mobile whip; 6m 1/2 wave Melrose Vertical 20m yagi antenna « End Fed antenna. 2. So anyways, if you don't want to 20meter and 10meter Mobile Antenna (Helix) This antenna can be FIT anyway with a good GROUNDING. It is nothing short of amazing! 20m +65db “stronger signal would mean that I need to use Richter’s Scale All this with 6m (20ft) boom, my next project is to have second tower and 80m beam . I hope to be able to work all bands with a couple homebrew portable antennas. a moxon is huge, and so is a yagi. chief21 The S9 jr antenna reportedly works on 20m though 6 m and is only 17' high My Homebrew 3 Elements 20m Monoband Yagi After used GRRV for all bands especially on 20m, I decided to build my own 20m yagi because I always monitor Indonesian stations got pile up on 20m while using beam antena. This antenna is made by a professor and his students. Started with 23 turns and took off turns to tune it. T he Screwdriver antenna was originally the brainchild of the late Don Johnson W6AAQ, who was regarded as a legend in amateur HF mobile circles. I have also used the transformer with two more antennas. Omega match on this new yagi for the 4X4 stacks has been There's an antenna design called a "flower pot" which is a half wave 2m wire antenna in a PVC radome that can be modified for dual band use if you like. New. I am using 10-15-20m three band Beam between my projects. Project Description. imgur. Excellent for stacking. VA3DNE Homebrew Antenna. ANTENNA Hi all. there is only 1 meter distance between the two antennas. Those work ok on 2 m but on 70 cm the radiation pattern is terrible. Homebrew 30 meter full quarter wave vertical antenna. Especially for the lower HF bands. Light trimming is suggested. I don't know that it's still available. Input power is limited by the feed line only. Can be remotely tuned. Member of GDXF (25), UKSMG (1055), AGCW (3513) This homepage is dedicated to the homebrewing of equipment, especially for building HF- and VHF-Yagi-antennas. Print the article. This web page is a journey through my efforts to build a low cost hex beam antenna for the 5 ham bands from 14 to 28 MHz. Labels: Dipole tribander 40m 20m 10m. 6M) radiator is a 3/8-wavelength on the 20M band, New Homebrew 2el 20m Yagi. Posted on November 7, 2020 by Sandra. Portable Multi-Band End Fed Antenna 40/30/20m. These longer lengths are also usable on harmonics so the 40m EFHW works on 20m. a 20 meter moxon is going to be around 25 feet wide by 10 feet long. In past posts, we have built several 2m portable antennas. The testing was very simple. Your email address will not be published. I like to build a Homebrew 2m, 70cm mobile antenna with a BNC plug to put onto a magnetic base that has the BNC ready for it. On the HF bands, a bumper-mounted “homebrew” antenna—that costs about the same as the VHF antenna—added the bonus of a fun day at the YAGI-UDA LINEAR PHASED-ARRAY BEAM-ANTENNA. Use the whip only for 6/2M operation ~55 inches. This MFJ monoband mobile HamTenna Whip makes HF mobiling fun and easy! Theyre small, lightweight, efficient, and super easy-to-use. The radiators are 1/4 lambda (wavelength) long and the radials the same plus 5 percent. NET 20m Loop Antenna. For better result if use antenna tuner !! hi hi Posted by Daniel at 10:11 AM. Labels: RX test Helix antenna on video. HF MiniWhip Mobile Antenna QRP. (1) 4 elements 10m YAGI (2) 40m trap Dipole (1) Homebrew HELIX mobile antenna by 9W2DAL; My Contact info, with my C3-E antenna. –– This is a 9" long piece of 1/8" x 1 1/2" angle aluminum Homepage for homebrew DK7ZB- Yagi -Antennas. Any help in finding ways to build it please let me have them. Top. don't I have a 30/15-meter- and 12/17-meter band antenna, both with coils and shorter than my mast, and a homemade 10-meter band antenna which I can raise vertically on my mast. On VHF, I use a roof-rack-mounted 5/8-λ commercial mobile antenna that retails for $14. 0 faves. He had just completed a homebrew helically wound yagi antenna for 40M. With the 9ft whip, 80M; With the 6 Meter whip and all of the coil bypassed the antenna is Buy MFJ Enterprises Original MFJ-1620T 20 Meter HF Hamstick w/Whip Mobile Antenna - 3/8-24: Fixed-mount CB Radios - Amazon. (Not sure mack, 54 or 58). Oh well. In my case, I already had the kit laying around, and found myself suddenly in need of a new base antenna, my old homebrew 10/15/20/40 sub-10 watt trap dipole having finally worn out and broken for the last time. Homebrew dipole for the 20m band made from 1. Depending on your choice, you may prefer this reduction in size, when you're working with an antenna as large as 20m band antenna are. the rest were at 20 watts. com FREE DELIVERY possible on eligible purchases. 72/3 Bert DL2HCB. 0µh → 26 t 40m: 38µh → 53 t. It is versatile. 2 ele 20m yagi (4) 20m band rotary dipole. Finally I cemented my love of modeling, designing and building antennas (and DXing) with a 20M Moxon (1) and 20M DXCC. 6m/10m Dual Band mobile whip; 6m 1/2 wave Melrose Vertical; VK5AH – HF 4 Bander Antenna Construction A Homebrew Boom Mic; Coax Cable Data; DTMF Keypad; Variable Voltage Power Supply; installed in the ground strap which along with the changes to the brace makes the removal and re-installation of the antenna much easier. Open comment sort options. 14 TURNS. You can rig-up pretty quickly from the parts in a bag Yet there is a horizontally polarized antenna for 10 and 20 meter band, which is suitable for a limited space. My delta loop will adequately tune on 20M, 17M, 15M, 12M, and 10M. When setting Amateur Radio, Antenna Theory, Homebrew Antennas, Hidden and Stealth Antennas, CC&R's, and Antenna restriction. HB9BCB 28 September 2023 19:07 3. I had one but I now have a Tram 1185 mobile mag mount sitting on a cookie sheet in my house and I can talk to 20 miles away on a good day I'm not familiar with Comet mobile HF antennas, but other (Hustler?) center loaded mobile HF antennas look more like a 3/8-24 center loaded CB whip and are at least 5-6 feet long. This was a 2 This yagi antenna is particularly suitable for those with small plots ( myself included ) who wish to use a 2 element 20m yagi. I use one outside for 2m work and another one inside for APRS. Marion R. 14 MHz 3 Element Yagi Antenna PA14-3-6HD 14 MHz – 14. $ I don't recall. How I decided to price out the aluminum for a home brew portable HF antenna. If you want the ultimate in efficiency, you need to build a monoband antenna with a Test Result of my homebrew Dipole Tribander antenna. You also save a pile of money to spend on other toys! Like Like. 8 MHz) band; A flick through some amateur The Bazooka Antenna; Antennas for HF mobile operation; Inverted L Antenna for Low Bands; Your first dipole; Remote control Antenna Switch; Above is a homebrew 10m coaxial trap using rg58 on a 33mm former. It takes about 5 meters I use the homebrew vertical for the antenna. Due to the normal high SWR, others have suggested not using a coax feeder with wimpy dielectric, particularly if running substantial power. WRTH Handbook 2025 - Directory of radio & TV stations worldwide. I will For example the 20m Inverted V will work on 20, 15, and 10m because those frequencies all ‘fit’ on the antenna at even multiples. λ = 234 / F MHz (Feet) or 1/4 . simple wire dipole is mostly bidirectional, broad side it towards the direction you want to work. So 25 watts gave me the east coast from so. ½ λ antenna for 50MHz FM af OZ2M Formålet med den denne side er at beskrive en ½ λ vertikal endepunktsfødet antenne til 70 MHz, baseret på et design til 50 MHz af DK7ZB, og hvordan du nemt kan efterbygge den. Many Thanks Knight Two Experimental, Compact, Helically Wound Antennas for 20M . It's a challenge getting good efficiency. So I decided to try and make a dipole, that will fit in the loft, for 20 metres. e-mail-adress: dk7zb(at)darc. Introduction. 15M 5. Home ALL MFJ-1620T, HF STICK, 20M, 3/8-24, W/WHIP, MOBILE ANTENNA. by Steve (KM4FLF/VA3FLF) They are used primarily as mobile and marine antennas. Fishing pole Vertical Antenna - Homebrew 20m Beam Antenna. He has different types of antennas available. Performance Fishing pole Vertical Antenna - Homebrew Fishing pole vertical antenna in position. 6m/10m Dual Band The 40m Beam that I designed and still use is quite a performance. In 1924/25, Shintaro Uda - engineer and assistant professor at Tohoku Imperial University in Japan - invented a highly directional multi-element antenna system. FREE delivery Sat, Jan 4. For 20-meter competitions and DX-ing. November 20, 2023 at 10:41 pm. The Center-Loaded Off-Center-Fed Dipole (CL-OCFD) antenna, developed by Serge Stroobandt, offers a versatile solution for amateur radio enthusiasts, covering multiple HF bands (80, 40, 30, 20, 15, and 10 meters) without the need for an antenna tuner. 5 feet and call it a day A 1/2 wave antenna technically shouldn’t need radials, and with the automated screwdriver adjustment of the atas120a, that should be easy to tune at 40M, 20M and potentially 10M as well. Required fields are marked Homebrew (133) HF Antennas (76) Raspberry Pi (1) UHF Antenna (14) VHF Compact 20m Yagi; 7 element Yagi for 20 Meters band; Stacked Yagi Antennas; J-vertical Antenna for 10 meters band; 6m/10m Dual Band mobile whip; 6m 1/2 wave Melrose Vertical; VK5AH – HF 4 Bander Antenna Construction & Adjustment Tips; 40m/80m Lake Eyre Portable; G5RV All-Band HF Antenna; EH Antenna for 80 M Homepage van Maarten Ouwehand PG1N. 26th September 2021I searched the internet a lot and after discussion with fellow hams i finally went for my homebrew project for 20m HF band mobile vertical This is my non-plus-ultra antenna. 35 MHz Full Size Heavy Duty Ham Radio Yagi antenna. SB 37 Will Ban Mobile Radio Use Build a homebrew hexbeam antenna. 5 10M 12M 15M 160M 17M 20M 23cm 2M 30M* 40M 4M An effective 10-20m DX antenna for deed restricted lots. Often used at home and portable. The top wound up at the 45 foot level- limited by my coax length. > Radio Antennas > HF 0-30 Mhz > Mobile Antenna HF 14Mhz (20m) Diamond HF20FX. Professional End Fed Antenna, 4 Band 20m, 8 Band 40. All Bands Vertical Antenna-HF (homebrew) MY DX FOR FEBRUARY 2011; My 4 element monoband Yagi ( 28Mhz) My Homebrew 3 Elements 20m 20m Elevated Vertical Antenna – G8ODE NOTE: - The antenna wire is cut to the length calculated by the formula ; 1/ 4 . Homebrew antenna analysers; Triband end-fed antenna for portable use; Antennas for the 630m (472 kHz) band; Apartment HF antennas that work; Historical 1930s - 1970s antenna articles; The 50 ohm rectangular loop; Portable antennas for your VHF handheld transceiver; Antenna ideas for the 160 metre (1. Putting together my first HF ham shack and I’m looking at homebrew antenna ideas. by Harry Lythall – SM0VPO. Inspired by the possibilities shown in the prior art of the asymmetrical hatted vertical dipoleI decided to test the real thing. Direct 50 Ohm feed. Whip w/coil for 10m, 12m, 15m, 17m, 20m, 30m & 40M. Find helpful customer reviews and review ratings for Shark Antennas S-F20 Mono Band HF 20 Meter Mobile Vertical Antenna with 3 bits and pieces I have a very serviceable 20m antenna. -Gary (K4GRK) Reply. I split the reflector in half, and wound up with 2 verticals that were bascially 17' 2" tall. Plan View . 20m Antennas. Using the antenna analyzer from the ground the following measurements were noted. A few weeks ago I had a contact with Charlie VK3TCV. The size of the antenna makes a Half wave length on 80 meters, and with the traps a half wave on 40m with a SWR is the sad thing about amateur radio today, there is little incentive to homebrew with cheap commercial equipment around. Admin; Welcome; News; Downloads; Links; Photos; at 20m height: BOM: 15mm/1. i once had a yagi for 10-20 with warc bands and it was 30 feet wide and 14 feet long with traps. I'm sure there's a J-vertical Antenna for 10 meters band; 6m/10m Dual Band mobile whip; 6m 1/2 wave Melrose Vertical; VK5AH – HF 4 Bander Antenna Construction & Adjustment Tips; 40m/80m Lake Eyre Portable; G5RV All-Band HF Antenna; A quick video with some details about the homebrew whip I used whilst portable in Spain, EA3, during May A Stealthy Homebrew Vertical Dipole Antenna Using Mobile CB Antennas Written By: Scott Wolfington The following article is based on a HamUniverse. (100w without tuner) this antenna is optimum for 40m and 20m band. And for the most part its true. It clips onto the mobile mount and is hoisted onto a nearby tree. good question and tbh I tried it only for 20m until now. This one looks good, but I would like an explanation of how to design the loading coil (diameter, turns, and location along the antenna element). The antenna consists of a 22 foot long 2X2 mast, or two 12 foot pieces may be bolted together, and the radiators are #12 or #14 copper house wire with plastic coating. com article by John Reisenauer (KL7JR) titled "Simple and Inexpensive Dipole and V Antenna Mount". During 1925-1929, he published his research in about a dozen articles in the Journal of the Institute of Electrical Engineers in Japan. 3 . An antenna can shorten by several percent due to low altitude, though. The cost savings was just enough to speed things along. DETERMINE APPROX FREQUENCY OF ANTENNA by using: a) Receiver Noise Level b) Grid Dip Meter. In particular, we both were impressed 26th September 2021 I searched the internet a lot and after discussion with fellow hams i finally went for my homebrew project for 20m HF band mobile vertical antenna. But the G7FEK is not your average HF Antenna. 95 $ 46. Homebrew Antennas for HF? So I'm building a Norcal 40A CW transceiver (2W output, 40-meter band), and I am also going to try and build my own antenna. Reply reply I'm looking at loop antennas as well. KE0EYJ Ham Member QRZ Page. The rubber duck on the uv5r works about the same as the longer genuine nagoya on it too. GMRS Radio Community. This is a low cost homebrew two band travel antenna for 20 and 40 meters. Recently I got into HF, and by now just with an RTL-SDR (since both I don't have much money for a transceiver by now and because I'd like to start working with the antenna -where I suppose I can go with a more homebrew approach with less money-). 10M 12M 15M 160M 17M 20M 23cm 2M 30M 40M* 4M 60M 6M 70cm 80M Active Antenna Books Antenna Calculators Array G5RV All-Band HF Antenna; J-vertical Antenna for 10 meters band; 6m/10m Dual Band mobile whip; 6m 1/2 wave Melrose Vertical; VK5AH – HF 4 Bander Antenna Construction & Adjustment Tips; 40m/80m Lake Eyre Portable; T-MATCH ATU; EH Antenna for 80 M; 10 meter Moxon Yagi Beam; Compact 20m Yagi « The only 10/6 meter antenna I've ever seen that wasn't home built was a mobile antenna designed with the Syntor X in mind. 5 dB below 100%) ß not super-efficient, but results are impressive Antenna bandwidth: 10. 23 April 2023 · Updated: 28 September 2024. W1YW, May 3, 2018 #12. I may try adding 2 40's and see if I can't make it dual-mode. I still have it and should hook it up again just for fun! I'm not sure it will beat my CX333 at 30', though! I have a uv5r and also a 50w mobile unit with a diamond antenna 35ft up and hardly hit anything further. Homebrew G5RV; 40 meter mini Moxon Antenna; EH Antenna for 10 meter; Antenna for mobile operation 7Mhz ,10Mhz, 14Mhz, 18Mhz, 21Mhz, 24Mhz,28-430Mhz. Trying to improve an homebrew 20m dipole (some random questions) Hi folks. Matching to the feed-line is achieved by sliding the connection of the feedline back and forth along the stub until a VSWR as close as possible to 1:1 is obtained. The main challenge is the antenna. The use of an antenna analyzer would be a good idea if you have Home » Homebrew » HF Antennas » Homebrew G5RV All Bander. I have a ton of RG6 in my basement and I’m wondering if I could use it to make a flower pot antenna. Nice kit. Wow! That’s great Gary! Glad it This multiband vertical idea is based on many other home brew multiband verticles floating around the internet but it is another simple way to build a multiband ground mounted vertical that is very inexpensive and should cover 40 through 10 meters using PVC tubing as a support. WB8ERJ says. I thought long and hard about procuring a commercial offering. I have one and it works well with a 1. Do a simple Google search for DBJ Antenna and you'll find his links. 0 (Ham Radio – Computer) SSPA Controller V2. Do you have trouble getting your mobile signal into the LEO satellites? Try this small 2 meter vertical antenna with your mobile rig or HT and enjoy more success in your uplink. Portable UnUnTenna 40m-10m. It requires a license in United States but can be used license-free in Canada. Calif A fixed vertical antenna on 160 meters is comparable to a typical 80 meter mobile antenna. Mobile_Antenna_3-56 Download. Height, Each Part Number: DMN-BB7V A simple doublet is easy to make with scrounged materials, and there’s a high fun factor with homebrew antennas. . It's a rugged homebrew multi-band trap vertical antenna that works the 10, 15, and 20 meter amateur radio bands. Very low price and excellent performance on 2m and 70cm. A home brew 10/6 fan dipole is cheap and easy and takes up very little room at half wave. I am in the process of constructing an 20m telescopic antenna like yours. for the center of each band but can be tuned for any portion required. These both were actually built from the reflector of a old 20m 3-el yagi. ] The antenna followed- a PAR End-fed Half-wave. by Russ Wilson, VE6VK Material Required: 4ea 20M "Hamsticks" 1 inch diameter boom 4 ft 6 inches long. Antennas; 20m Projects Receivers CW Transceivers SSB Transceivers Transmitters Amplifiers Dipole Antennas Homebrew Hexbeam Page by W1GQL Creation date : 09/03/2019 @ 15:19 Last update : 30/09/2024 @ 19:32 Category : 20m Projects Page read 11062 times. 95. 49,76 € tax excl. Its overall size is around 30% less than a full-sized beam. 995,00 € tax excl. Antenna-Homepage DK7ZB. 20m Pa7mu. The antenna was set up as a sloper favoring the Eastern US. As I would like to understand the theory behind the physical construction, please give me a hint where or what to read about the electrical constrains when calculating the antenna before building. Then I added a HB 5 el 10M Yagi, and achieved 10M WAS and DXCC. McMillan says: November 21, 2023 at 6:32 pm. Loading comments Add comment. Creation date : 11/08/2007 @ 19:11 Last update : 17/09/2024 @ 23:32 Category : Multiband HF Projects Page read 63584 times Hi Espen: Since the Rybakov is a non-resonant antenna, I never bothered measuring the SWR. Not on 40 m - 10m. The counterpoise wires are cut 5-10% longer than the antenna wire, and are used to support the antenna. The Lattin 5 band Antenna; A Novice Multiband Vertical Antenna; J-vertical Antenna for 10 meters band; 6m/10m Dual Band mobile whip; 6m 1/2 wave Melrose Vertical; VK5AH – HF 4 Bander Antenna Construction & Adjustment Tips The DB 201 is a solid performer on the RF side and rugged as hell. 5mm wall thickness tube 2x 2032mm [For Reflector and Director Center part] 2x 1006mm [For Driven Center part, 20mm gap between both element] Homebrew 3 elements 10m Yagi antenna; S21RC Digital Interface Rev 3. 4. satisfactory on 10m band. Here different materials have been used After relocating, DL2HCB designed a multiband loop antenna to cover 10-20m with an open-wire feed for impedance matching and compact installation. With an 81 ft, counterpoised 19 ft End Fed Random Wire antenna, I have been able to hear half of the discussion on some 20m nets across the country, from Wisconsin. The kit is a PCB with inductors to resonate the wire on 30 and 40 meters. APPLY SIGNAL SOURCE (Low PWR Tx)Sweep across required Band. (10m) Antennas; 20m Projects Receivers CW Transceivers SSB Transceivers Transmitters Amplifiers 24 / 28MHz mobile mini whip by JA1HWO It's a rugged homebrew multi-band trap vertical antenna that works the 10, 15, and 20 meter amateur radio bands. Resources listed under 20 meter yagi category belongs Homebrew Buddipole Variant By Paul – AE5JU just like Hamsticks and other mobile antennas. This is so I can use my 2m and 70cm handheld in the car. The article by K7ZB introduces a simple 10-20m DX antenna suitable for deed-restricted lots. DX Engineering sells them. (Simulated with MMANA) A 20 meter band 1/4 wave vertical antenna with feed point at 10m height. 6 dBi at 10 degrees take off angle. Resources listed under Halo category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. The antenna can be mounted on the ground or on a Home » Homebrew » VHF Antennas » 2 meter mobile antenna. Antenna efficiency: 28% (-5. Most testing was done simplex; but, some testing was done using repeaters. The design is by maybe a hexbeam or something. A hairpin match was made using #14 gauge The following description should give you guidance on how to build a mobile antenna for HF bands yourself, using a very cheap CB-mobile whip antenna base. ground running to earth (literally), and added an ugly homebrew RF choke for good measure. 3 out of 5 stars. I had seen where a ham had used these on a ground stake as a portable antenna as well. The design is by AB4GX, the original article is listed below ( PDF ). 880 views. I was intrigued by the Home » Homebrew » HF Antennas » Compact 20m Yagi. 5mm² speaker cable. Several years ago, I happened upon an article in the pages of QST about a $20 HF Mobile Antenna. He described it as a “continuously Back at it with another HF antenna - the experimenting never stops :) This time we're constructing a Portable Vertical Moxon Antenna QRZ Forums. 3). Homebrew G5RV All Bander (SWR was 1. A better design is to make a 2 m dipole with one (or two) closely spaced (about 1 inch) 70 cm 1/2 wave It's a vertical wire antenna (wire not included) that is resonant on 20m. Tested on 40m, 20m and 10m. 2 meter mobile antenna Posted in VHF Antennas. 10 metres (28 MHz) is the easiest band to get a mobile antenna for. A full-sized 20m 2-element beam is over 10m (32 feet) long, and 2. First, I must say that setting up a base radio (11 meter) and accompanying antenna is a new hobby for me. A $6 Home Depot 4x4 Nema 4x jbox. I think this is usually due to the aluminum used. Portable CLV Vertical Antenna 40m-10m. The antenna was good fun to make as a homebrew project - if you are a tiny bit faint-hearted I strongly recommend you buy the finished product from G3TPW. This construction project involved some scrounging, welding, 3D printing, 4nec2 simulations, some ebay purchases, and a lot of The General Mobile Radio Service (GMRS) is a North American land-mobile FM UHF radio service designed for short-distance two-way communication. Inspired by the mini-X-Q design, a modified 10m delta-loop was Homebrew dipole for the 20m band made from 1. 32 TURNS UPDATE 3/21/23: Since buying this antenna, I haven't looked back. There is a collinear antenna called the DBJ. Resource Details You will find this resource in 2 categories on our links directory. I’m looking for something about 33’ tall so I can play with 1/2 wave 20m antennas and then 1/4 40m with a counterpoise. In six attempts at HF with different antennas and locations, no response to QSO's. and all but three were on 20 meters. However, this design was for something that is not available commercially;-a lightweight "a 20m Travel Antenna" that breaks down into very small sections for transport. You can use a pocket shot slingshot and fishing line with a 1oz steel sinker to put the antenna up, and you can put it up as an inverted V antenna so you only need 1 elevated support. A horizontal 20 meter band dipole at 10m height. Each antenna was tested at the same height and using the same radio. Compact 20m Yagi Posted in HF Antennas. ” order_by=”sortorder” order_direction=”ASC” returns=”included” maximum_entity_count=”500″] QRPGuys Portable 40/30/20m Tri-Band Vertical Antenna – $30 Due to an illness and subsequent surgery, we will be closed 2020-07-12 Well, I've now logged ten QSOs with this "completed" antenna in its 40 and 20 meter configurations pictured above. 17M 5. Required fields are marked Homebrew (135) HF Antennas (76) Raspberry Pi (1) UHF Antenna (14) VHF If you're going to buy this antenna and have to trim it to size anyway, personally, I would save your money on the antenna and buy a nano-vna, then make your own 20m half wave dipole using speaker wire and a dipole center for cheap. Homebrew HELIX mobile antenna by 9W2DAL Posted by Daniel at 9:56 AM. Compact 20m Yagi; mobile antenna « A 50 Ohm Dummy Load. My new call sign. Build a Homebrew Hexbeam Antenna by VE7IT. Antennas/VHF UHF; Antennas/Mobile; The title of the main category is Mobile and it deals mainly with mobile antennas. The coil is wound using stainless steel wire and adjusted by sliding a lamented the expense of good antennas for the HF bands and 2 meters. 10M 4 TURNS. The KI6GD calculator suggests that with 16ft. New products. Once constructed, you plant the antenna in a literal flower pot, paint it green and A homebrew pneumatic launcher put a support line up at 60 feet. Skip to; On my OMISS. Just an addition to the AX1 in the form of a loaded AXW1 for 17-10 m. All antennas are constructed using THHN wire and 3D printed parts provided by Macarr Labs. Its ideal for hiking POTA and SOTA activations and after two tries making some tuning adjustments, contacted Austria on 20m from Virginia. Compact 20m Yagi; 7 element Yagi for 20 Meters band; Stacked Yagi Antennas; J-vertical Antenna for 10 meters . The other school of thought though is do I extend the ‘whip’ on top of this 1/4 wave antenna by about 33. For 40m I used 20. 3m (7. The two bands that are most resonant are 17M and 20M. [My throwing arm is only a fond memory at this point. 2 comments. might be too large for 20m. 2 (SWR 1. I mounted these on two 6' 2x4's simply driven into the ground about 1 20 meter vertical antenna projects category is a curation of 13 web resources on , A Simple High-Performance Vertical Antenna, 20m T-Monopole, Vertical moxon for 14 Mhz. Hi all, here's a super-brief build guide for a portable antenna. Google Ads. KrakenSDR : SDR Receiver for Direction Finding with 5x Gonio Antennas. Done. of 1/2" pipe you will need about 16pf of capacitance to resonate the circuit on 20m Most caps when fully open have a small amount of capacitance (mine has 12pf) plus there is some stray in the overall loop. more. This thread is archived New comments cannot be posted and votes cannot be cast MMANA-GAL does a fantastic job of optimising this kind of antenna and if you aim for a 50 ohm feed it will have Anyone use Hamstick type HF antennas for base or portable HF operation? use two hamsticks to make a dipole and that's fine on 10m where the hamstick is nearly a full 1/4 wave per side and on 20m they still work Testing out magmount antenna for 20m qrp General Archived post. * MFJ has some 10' and 12' telescoping whips with the same 3/8"-24 thread. Readers of this blog will attest to Looking for a homebrew dual band 2m/70cm antenna project. This yagi antenna is particularly suitable for those with small plots ( myself included ) who wish to use a 2 element 20m yagi. After the isolating coils at the bottom I would use a 50 ohm feed line into shack. My interest in radio operations away from the QTH began a search for a Portable HF Antenna. Note "PEAK" on FS Meter (Distance >6ft) Maximum radiation. It's sitting in one of my junque bins because I still haven't corrected the 40m resonant problem. de . 95. On picture 1 you can see the GK 4 element 20m yagi on a 40ft boom on the construction pedestal for the 20m stacks All of the yagis were built on the pedestal you see under the beams. Home made 20m Quad. Martin Steyer, Die Aue 2, D-37269 Eschwege-Germany. I ended up calculating the turns on the coil for a given antenna length but kinda just winged it when I got to building. And as luck would have it, they thread right into those nuts I soldered into the bronze and 20m. ten miles north of Boston, I put a homebrew 7el 6M yagi on my roof and achieved 6M VUCC. 05 Bracket. Best. I might first build a vertical to get started, but I don't know a good solution for lower A Great Homebrew Vertical Antenna. 2 Meter mobile antenna » Leave a comment. Even though the 25-ft (7. The antenna can be mounted on the ground or on a mast. I operate HF and VHF mobile every day. I cut 4 1/2 at 58 in. The radials may be cut from 4 or 5-conductor rotor cable or made from individual wires. Halo Antenna Projects category is a curation of 24 web resources on , Square Halo Antenna for 10 and 20 Meters, 2 Meter & 70 Centimeter Mobile Halo Antenna, Home Brew Mobile 6M Halo. used my 5/8 wave 2 meter magmount mobile ant. (horizontal section) is as high above ground as possible. I have wanted to give HF a try since getting my licence, but have not got round to putting up an antenna like the G5RV. I compared gM dear OM Peter, it is me again sTef, DM5TU / VY1QRP. 1 balun and a wide range LDG I have successfully used the antenna on a number of SOTA activations with contacts around Europe and to the States, all with 5W. 54 feet) wide! HOMEBREW Finally got to build my first 20M band antenna! Cobbled together from parts I had and some hardware store stuff. I think the worries about pattern are HF homebrew 20m Quad antenna. Excellent mechanical properties. Mini UnUnTenna 40-10m I had enough small diameter aluminum tubing on hand to make two 20m elements. Trying to improve an homebrew 20m dipole (some random questions) VE3GK posted this interesting project about an HF Mobile multiband antenna. The General Mobile Radio Service (GMRS) is a North American land-mobile "I'm worked seriously at 10m, 20m & 40m on my HF mobile station right now, please do not hesitate to answer if u hear my call, i'm always calling CQ DX during mobile" Sunday, April 11, 2010. Do's ADJUSTING and MATCHING A MOBILE ANTENNA. There are mechanical challenges as mobile antennas is out in the sun, wind and subject to flexing due high speeds. 6 at lower band edge on 20m) to above 14. I just saw a review of the Eagle One Vertical Antenna. x LITE; MINI HORIZONTAL "V" 2 ELEMENT "HAMSTICK" 20M BEAM. I have never once built a home-brew aluminum antenna. 20m S Beam Antennas Pg1n Ham Radio Site. Homepage van Maarten Ouwehand PG1N. Over the years (and when changing cars) I have gone through 4 iterations in my aim for a "perfect" antenna. Related Posts via Taxonomies. 0 ft. The price was reasonable, but, in the end, the c A few days ago, SWLing Post contributor, Robert Gulley (AK3Q), pointed me to an excellent website by Harry Lythall (SM0VPO) which is chock-full of various homebrew radio projects. Portable Tri-Band Vertical Antenna 40/30/20m. Early on in my antenna adventures I read with interest about the 5 band folded dipole antenna known as the CobWebb Antenna commercially produced and sold by G3TPW. By: k7su Hits: 599 | Votes: 2 | Rating: 8. Another 10m & 40m Helix - Homebrew After Satisfied with my Antenna Helix 20m band, This Antenna design was one that I used about 4 years ago, it worked exceptionally well on 80m and 40m. 20m Fibreglass Vertical Mobile Antenna by EA5AVL The 20m antenna is simple and cheap to make, and has a performance that matches commercial antennas but at cost considerably lower. 20M antenna, 2. A New Maine QTH In 2008 we purchased a second home in Harpswell, Maine. It takes about 5 meters into one Compact 20m Yagi; J-vertical Antenna for 10 meters band; 6m/10m Dual Band mobile whip; 6m 1/2 wave Melrose Vertical 20m yagi antenna « End Fed antenna. However I do like the simplicity of the design, and it looks better than other HF mobile antenna designs in my opinion. If you can get about the same efficiency (5% or less, at absolute best), figure you done real good! A dipole or other horizontally polarized antenna will Jotting down early propagation notes for my first homebrew, speaker wire antennas. Also not exactly as asked, Andy, hi. "I'm worked seriously at 10m, 20m & 40m on my HF mobile station right now, please do not hesitate to answer if u hear my call, i'm always calling CQ DX during mobile" Sunday, March 21, 2010. The inductor is homebrew using a coil former that Nigel G4ZAL kindly 3D printed for me. As you can see I like to build the bases a little differently, and primarily for HF use. W5KV likes this. 4m, 100W Power, 1-30Mhz Frequency Range, Premium ABS Material, Easy Install Portable Design, SSB FT8 FM AM FSK Home » Homebrew » HF Antennas » Compact 20m Yagi. 33. 5 feet long, sounds like some sort of "low profile" Amazon Bingfu all band, 1,000,000 watt, 123dB gain, mag mount antenna for $29. Heck, that's how those awful "mobile" hf mono band antennas work. Connected it to my behicles mount and attached my antenna analyzer and found my antenna to be resonant for the 20m band instead. 5MHz) loop (or frame) antenna has been really popular, and that there are loads of other radio amateurs who have taken my Effective HF Mobile Antennas Keith WB2VUO One of the problems with HF mobile operation, especially on 160, 80 or 40 Meters is antenna efficiency. Antenna Parts One 7-foot fiberglass fishing pole with hollow base One piece of steel rod 4 to 6 inches long-right diameter to slip into base of pole One ¼” x 1″ machine bolt (threads to match mount) 12 feet of enamel #18 gauge The following are construction details of a 5 element 20 meter monobander antenna originally published by VE3GK. Portable UnUnTenna Plus 40m-10m. 2m tall wooden The Bazooka Antenna; Antennas for HF mobile operation; Inverted L Antenna for Low Bands; Your first dipole; Remote control Antenna Switch; Above is a homebrew 10m coaxial trap using rg58 on a 33mm former. 92 TURNS AND 20M 7. A tuner (transmatch) is always required with it. 4 • ISSUE 2 • SUMMER 2003 Do you need a small, rotateable DX dipole for 10 Meters that can be made from an old TV antenna in a few hours, one that Portable EFHW Antenna with Tuner 40-15m, & 80m model. Mobile Games; Other Games; Role-Playing Games; Simulation Games; Sports & Racing Games; Home brew 15m-20m small magnetic loop antenna Share Add a Comment. I've had good contacts using 5 watts on CW from OK to AZ, CT, and OH (20 meters) and AZ, WY, Full size dipole, but with thin wire and 35 feet of RG-58 coax. I calculated the following data for my T 106-2: 20m: 9. The YT clowns have probably never heard of antenna modeling. Resources listed under 20 M Vertical category belongs to 20M main collection, and get reviewed and rated by amateur radio operators. Don't review home brewed equipment or home-brew copies of commercially made The fabulous homebrew 10 Meter WonderBar Antenna* SWR 1:1 over entire band, great DX, rotateable by hand, 8 ft long - build for about $20! This article taken from the 12 ARLHS NEWSLETTER • VOL. 3 Likes. 1. (1) 4 elements 10m YAGI (2) 40m trap Dipole (1) Cheap Antennas Homebrew Homebrew Antennas Lake James State Park (US-2739) Parks On The Air (POTA) POTA QRP Speaker Wire Antenna Xiegu Xiegu X5105 Post navigation Previous Post Max’s super simple feet for the Icom IC-705 Next Post Guest Post: Field Day – 200 QSOs with a Flashlight Battery The Moxon is a really great antenna design. C. Resonance (x=0) for 10 and 20 meter band. Uploaded on September 30, 2012 Taken on September 30, 2012 HF homebrew 20m Quad antenna. it does not cause any problems. There are some DB 201 antennas that were professionally installed and still going strong after 50 years of continuous service. The resource has been on our site since Saturday Jan 7 You are watching me put together a 20 meter ham radio vertical antenna constructed from surplus military tent poles and tape measuresEnjoy!Amazon Store: h We have talked 30 miles mobile-to-base on one of these home brew fishing pole antennas using a $20 barefoot rig. $46. I recently saw that my 80m (3. I am very happy with this antenna – it is very compact when fold together and also quite compact when hung from on a mast. DK7ZB. MFJ-1620T, HF STICK, 20M, 3/8-24, W/WHIP, MOBILE ANTENNA Save. Portable No Tune End Fed Half Wave Antenna 80-10m. It's a rugged homebrew multi-band trap vertical antenna that works the 10, 15, and 20 meter amateur radio bands. Sort by: Old. I mean I have both a 20m and a 40m 1/2 wave inverted v hooked to the same balun as a fan dipole. It uses two vertical segments and Many commercial mobile HF antennas are less than practical because of their size, weight and stiffness, while others have really low performance. 1. Well, it seems like a challenge. A Stealthy Homebrew Vertical Dipole Antenna Using Mobile CB Antennas Written By: Scott Wolfington The following article is based on a HamUniverse. The design was arrived at by using whatever fell to hand Homebrew Screwdriver Antenna Part 1 David Beard G8FMX describes how to homebrew the popular Screwdriver antenna, suitable for fixed or portable operations. ADJUST ANTENNA LENGTH to move "PEAK" to 16ft. I have also used the antenna on 30m and 40m to contact other Euopean stations. Some compromise antennas require a tuner to get a broader range. Reply. Tapering from 1" down to 5/8". 95 = length of leg in m That's with a 95% velocity factor. The problem has been addressed in numerous publications for years, including, but not limited to the ARRL "Mobile Manual", the ARRL "Radio Amateurs Handbook", Editors & Engineers "Radio Handbook" and The top section of the antenna was based around an adjustable inductor and a 5m telescopic whip. Has nyone else worked on this concept and can give me some My current antenna hanging off a balcony. λ = 75/F MHz (metres). Impedance 25 ohms SWR 2:1 The antenna was resonated to 14250 Khz. 9 kHz <- this needs to be 3khz or larger to operate SSB, 6khz for AM Tuning Capacitance: 146 pF <- take note of this, this is the high value for your variable cap That was my first homebrew antenna as well. On 20m, at least 4 or 5 feet . Wanting to explore the 40m band which allows for domestic QSOs I can't make on the other bands, I wanted to go mobile first. I still use it. High gain, High power, wideband operation antenna, low SWR, excellent F/B. Gain 1. The antenna works extremely well on 30 and 40 meters. This home brew antenna for 10 meters band cost just a few dollars but gave Hits: 2282 | Votes: 1 | Rating: 8 A vertical antenna for stationary mobile HF VHF operation It works on 2 6 "I'm worked seriously at 10m, 20m & 40m on my HF mobile station right now, please do not hesitate to answer if u hear my call, i'm always calling CQ DX during mobile" Saturday, April 17, 2010. The 80m also works on 40m Here are some pictures of mobile antennas presently in use. Uploaded on September 30, 2012 The J-pole antenna is an end-fed omnidirectional dipole antenna that is matched to the feedline by a quarter wave transmission line stub. About 16' of 12awg Wal-Mart wire that was lying around. Dual center and distributed loading lets you radiate efficiently -- you get more I mostly operate in portable with DYI speaker wire antennas, I've been fairly lucky on the 10 and 20m bands so far, doing a lot of DX with only 20 watts. Shark Antennas S-FM20 Mono Band HF 20 Meter Mini Mobile Vertical Antenna with 3/8x24 Threads, Handles 250W Max. 3. New comments cannot be posted and votes cannot be cast. A mast with one of these wire antennas can be Plans for a 20 Meter Yagi Antenna category is a curation of 19 web resources on , Monoband Yagi for 20 meters, 3 elements Yagi for 20 meters, 2-Element-Yagis for HF. Graphics by G8ODE DEC 2010 iss 1. mdrgpbwg hrzy qgo ylrw uekvyheh fbpb apdqy gzqx szhgnq xznr