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An upgraded version of the Vhf dipole antenna. Now made dual band vhf/uhf by 2 dipoles in parallel. Reflector elements can be added if slight directivity is...Some ideas for alternative materials and design considerations around a 5 elements yagi for the 70 cm band.Measurement and adjusting.Antena GP 2m/70cm - budowa klasycznej dwupasmowej Ground Plane VHF/UHF. 2020-04-19. Z chwilą otrzymania Pozwolenia Radiowego swoje pierwsze kroki w krótkofalarstwie zacząłem stawiać (prawdopodobnie jak większość młodych stażem radioamatorów) z wykorzystaniem taniego radiotelefonu ręcznego pracującego w pasmach amatorskich 2 [m ...2m/70cm 4+5 El. 2m/70cm 5+8 El. 2m-Moxon+2-El.-70cm: Triband-DK7ZB-VHF-Yagi for 6 m, 4 m and 2 m with one Feedpoint. This Yagi was ... The antenna is fed with a choke-balun. I used 11 turns of Aircell-5 on a PVC-tube with 25 mm diameter. The length of the cable is about 1,00 m. The coax socket is mounted on the bottom of the radiator-box ang ...2M Quarter Wave Ground Plane Antenna - Ham Radio - TheSmokinApeIn this video we build a DIY 2 Meter Quarter Wave Ground Plane Antenna. Please leave any quest...Amazon.com: Delta2 Coms - Portable 2-Meter 144-148MHz VHF High-Gain Ham Radio Yagi Antenna - Made in USA : Electronics ... Quad Band Mobile Radio Antenna 29/50/144/430MHz 10m/6m/2m/70cm for TYT TH-9800 Plus,TH-9800D Includes 16.4ft Coaxial Cable and Bracket Clip. ... Protect & Build Your Brand; Become an Affiliate; Become a Delivery Driver;I was surprised to discover the 70cm band workable, while this makes sense since 70cm is the 3rd harmonic of the 2m band, the simulation did not hold promise. But sometimes you get lucky if you try. You too can build this 3-element Yagi antenna without fancy test equipment by using accurate dimensional measurements and good construction technique.The GMRS uses approx. 460-470Mhz range of the 70cm, so I assume that a dedicated GMRS antenna would be better. For Ham, I would be using my HT, so I would want a 2m/70cm dual band. There are so many antennas, I am hoping that a fellow RV /ham user has already found the antenna that would work for me.What you’ll need to make a Slim Jim: Some balanced ladder line feeder – either 300 or 450 ohm will do – If making an antenna for 145MHz, then you’ll need a length of 1.5 metres. For other frequencies, use the calculator later in this article. Some co-ax long enough to reach from the base of the slim jim to your radio.Duoband Yagi 2m/70cm with 4 Elements on 2 m. and 5 Elements on 70 cm and one Feedpoint. Version 1: Ultralight with 3,2-mm-Elements. Version 2: With 8- and 10-mm-Elements (see down), built by SQ9VPA. The 4-El.-Ultralight-Yagi for 2m can be used on 70cm with an SWR of 1,5 without any changes. The pattern and the currents of the Yagi are shown down.I’ve always wanted to have a go at working the satellites but never wanted to pay out on a dual band antenna. I already have a cheap uv5r radio that’s I’ve s...The $4.00 Ham Radio Satellite Antenna by KGØZZ It's a dual band 2m/70 cm yagi antenna made with common materials and cost very little to make. Also, the antenna is fed with only one coaxial cable and does not use a duplexer. ... I used the formulas to build it for 6m. It also happens to work out really well for 2m & 70cm use as well. https ...Mike calls this antenna the "perfect stealth antenna" for 2m/70cm. Mike does an excellent job of taking us through the design, construction, and testing process for this remarkably simple antenna. ... In this video, members of the Stamford Amateur Radio Association W1EE, show us how to build a ZS6BKW antenna capable of covering the 80 to 6 ...A local friend that I told about this antenna project built it today. Took him 45 minutes and cost him $12. Instead of using stainless steel for the elements, he used brass. He also tightened up the gap between the 2m/70cm sections seen in these pictures; the pics were taken before he corrected them. Nice job, Wayne! Here are the pics:permits the antenna to achieve high performance, high power rat-ing low vswr, and broader band coverage on both 2m and 70cm bands. 2. Direct element joint structure with two interconnected FRP outer-shells. Enables the antenna to maintain the same strength as one with one piece structure. The ring gasket makes the antenna water-proof, and ...Attic antenna for 70cm/2m. ANTENNA. I am planning on adding a simple J pole antenna (something like I found here) into my attic. Do I just mount it as high as I can into the peak, and run coax to where I'll attach it to my HT (antenna --> coax --> wall plate --> coax --> HT)? Am I missing anything, or any suggestions?Chapter 18. Fig 25—Simple ground-plane antenna for the 144, 222 and 440-MHz bands. The vertical element and radials are 3/32 or 1/16-inch brass welding rod. Although 3/32-inch rod is preferred for the 144-MHz antenna, #10 or #12 copper wire can also be used. Fig 26—A 440-MHz ground-plane constructed using only an SO-239 connector, #4-40 ...An RF choke can save the day for field radio operations where you do not necessarily control all aspects of your antenna system and common-mode currents can wreck havoc on electronics, and even your fingers! Use an FT-114-31 with six turns of RG-174 or RG-316. You can also use eight turns with an FT-140-43. For more power handling you can use ...A while back I purchased an Ed Fong dual band (2M/70CM) DBJ-2 antenna for field use. Roll up "slim jim" antennas are an excellent choice for your go bag. ... Not finding anything on the market, I decided to build my own packable PVC antenna. You should be able to figure out how to assemble the mast from the parts list below. All of this ...Built a Yagi 2m 70cm Tape Measure Antenna for amateur radio satellites but this video shows me having a QSO of a repeater about 20-30 miles away. Inspiration...Because the antenna is hand held, power should be kept to less than 10 watts maximum. If mounted and away from people, maximum power is 150 watts. $132.00. 146/437-10 Solid boom without duplexer. Use two radios with this antenna.Dualband Antenna's. 2×4 2m/70cm Compact Satt Comm Antenna; 2×3 2m/70cm Cross Yagi - compact build; Build 3 x 5 2m/70cm Cross Yagi 145-435Mhz; Build the 3 x 5 Elements 2m/70cm Yagi; VHF antenna's. 2 Elements Yagi 144Mhz; 7 Elements Yagi for 146Mhz band build; 2 Elements Yagi build for 107Mhz FM Band; Build the 5 Elements 2m VHF YagiDual band Yagi for 2m and 70cm with 4 elements on 2m and 5 elements on 70cm and one feed point, designed by DK7ZB. A great antenna for amateur radio satellit...This is post 2516 in a continuing series of simple ham radio antennas. Here are some general comments from Robert: In this video I give an overview of the design and use cases for 2 distinct eggbeater antennas, a DIY eggbeater V2 antenna and a commercially produced eggbeater antenna from M2 Antennas, both designed for 435 MHz and have right ...

Challenged myself to build a usable Yagi style antenna for the 2 Meter (2M - 144MHz) amateur radio band. The challenge part is that I wanted to use stuff I ...In this video I show how to make a 2 meter dipole Antenna for use with a HT for a SOTA activation. You don't even have to know how to solder!Check out the Ha...Put a SWR meter at the antenna between the small pig tail coming off the antenna and the feed line. Go to 144.300 MHz and check for SWR, then go to 147.300 MHz and check for SWR. If you have a 1:1.1 SWR at 144.300 MHz and a 1:1.6 at 147.300 MHz then your antenna is long, so move the shorting bar toward the coax connection to shorten the …Here are the plans to build a 2 meter J-pole antenna: The above dimensions for the J-pole are in inches. Measurements on overall length, and stub length are from the centerline of the separation pipe (horizontal) to the top of the antenna. The Connect at measurement is 2 1/4 inches from the top of the horizontal member to the point of ...

The GMRS uses approx. 460-470Mhz range of the 70cm, so I assume that a dedicated GMRS antenna would be better. For Ham, I would be using my HT, so I would want a 2m/70cm dual band. There are so many antennas, I am hoping that a fellow RV /ham user has already found the antenna that would work for me.To construct the antenna, first select a suitable length of grey 25mm conduit (as a minimum 1m but if you make it longer, you will have more room below the coil to attach to your antenna support). Basic arrangement of the 2m Half-Wave version. Drill two holes into the side of the conduit for the choke coil. The ‘top’ hole will be approx ...…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. A Simple 2m/70cm Vertical Dipole Antenna I have to seal the co. Possible cause: This antenna was designed for center frequency of 146 MHz and 440 MHz. On 2 meters, this .