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J-Pole antennas for the 2m and 70 cm (VHF/UHF) Amateur Radio bands come in many sizes, ranging from commercial models based on public service designs to homebrewed configurations using coaxial cable, 450 ohm ladder line, or even TV twin lead. Supporting structures can be anything from PVC pipe to wood, including temporary lashups affixed to ...Here are some of Mike's comments: "The construction of a shop purchased, ZL Special 7 element Yagi antenna for the HAM Radio 2M band. This no frills antenna boasts a 11.5 DBd Gain, is simple to build and works straight out of the box (once put together). Great bit of kit at a good price. Brilliant :) Please subscribe..If you build the antenna as shown, the computer model predicts 11 dBi gain and a front-to-back ratio of 20 dB. ARRL Lab measurements confirmed the computer-predicted antenna pattern. You may wish to read further about tuning adjustments in The ARRL Handbook. It describes how to check the antenna with a field-strength meter, or by using52-1BP. Dipole for 6m with split boom. With holes and optional elements for 6m, 2m, 1.25m and 70cm. This allows one boom to be carried for all those bands. This antenna was designed for SOTA. 10W. Micro Duplexer for the 146/437-10 Satellite Antenna (10 Watts) (fits inside the handle) 437X14.Getting radio frequency can be tricky if you live far from a radio tower. If you're having trouble hearing your favorite stations, consider getting an FM antenna so you can get tho...Mar 19, 2023 · Those work ok on 2 m but on 70 cm the radiation pattern is terrible. The YT clowns have probably never heard of antenna modeling. A better design is to make a 2 m dipole with one (or two) closely spaced (about 1 inch) 70 cm 1/2 wave parasitic element (also called coupled resonator).The first reference that caught my eye was the $4 Ham Radio Satellite Antenna. I saw this web page a couple months ago, and was thinking about building it, but haven’t gotten around to it yet. It looks like a very cool and easy project. One thing I was wondering about is why the 2m and 70 cm elements aren’t perpendicular to one another as ...This little antenna is cheap and easy to build, lightweight, and very functional on 2 meters and 70 centimeters. The finished product will look like this: Let's get started! For the welding rods you need the following: (1) piece 25 & 1/8 inches long. (2) pieces 6 & 1/2 inches long. (2) pieces 19 & 1/2 inches long.Sep 24, 2020 · This time I found an old fence wire, a piece of wood, and decided to make a yagi antenna. I already made an antenna like this a few years ago. Very simple. T...Here’s a small 2m / 70cm diplexer that is good for up to 10W of power, perfect for working satellites with a HT. The design comes from KI0AG and was originally published in the November-December 1997 AMSAT Journal. It consists of two Chebyshev low-pass / high-pass filters designed for the 2m and 70cm Amateur Radio bands.There are exactly two ways to pick up digital channels on your television set: You can use a digital antenna, available at most major electronics retailers, or you can sign up for ...Presentation by Joe EI6EG on the construction of a 2m - 70cm Dual Band "Eggbeater" Antenna.Joe's project design is from an older ARRL book. However, there a...Age : 71. Subject: Homebrew 2m/70cm Dipole Antenna Sun Mar 19, 2023 9:35 pm. Following on from my PMR446 Antenna I decided to try my hand at constructing a 2m/70cm Vertical Dipole Antenna. 3mm stainless steel rod was used for the antenna arms and various other bits and pieces I had laying around in my shed were used to complete …This "J" design can be used as adual-band'er - 2m/440. Technical: Thebasic "J" is reported to have >3dB of gain over a l ground plane antenna and 6dB over an isotropic (theoretical)antenna.The "J" can be made from almost any material: copper pipe, steelwhips, and even 300 ohm TV twin-lead.Here are some of Mike's comments: "The construction of a shop purchased, ZL Special 7 element Yagi antenna for the HAM Radio 2M band. This no frills antenna boasts a 11.5 DBd Gain, is simple to build and works straight out of the box (once put together). Great bit of kit at a good price. Brilliant :) Please subscribe..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 ...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?Dualband Antenna's. 2×4 2m/70cm Compact Satt CommI used 1″ thin-wall PVC pipe, aluminum tape, and RG-8X DualBand 2M/440MHz mobile antenna. This is the most popular antenna in the Comet line for several reasons: Mid-size / mid-price range / open coil flexs to absorb brushes with tree branches / black color fades into the skyline - ground independent. Gain & Wavelength: 2M: 3.0dBi 1/2 wave. 70cm: 5.5dBi 5/8 wave x 2. Find the perfect TV antenna for your home with our top picks and buyi Mounted to the horizontal cross piece with 2 U clamps, long legged muffler type clamps. Top of antenna is about one inch below the ridge beam. Bottom of antenna is approx 25 feet above ground level. Using 400 flex type cable (ABR brand from HRO). Just try to keep it away from any metal, vents wiring etc.Ham Radio 2m/70cm Vertical Dipole Antenna. A simple ham radio 2 meter and 70 cm antenna for fixed or portable use. Video Rating: 4 / 5. May 28, 2012. 4. Use paste flux on all joints when fitting the

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.Sep 24, 2020 · This time I found an old fence wire, a piece of wood, and decided to make a yagi antenna. I already made an antenna like this a few years ago. Very simple. T...Getting radio frequency can be tricky if you live far from a radio tower. If you're having trouble hearing your favorite stations, consider getting an FM antenna so you can get tho...Mar 19, 2023 · Those work ok on 2 m but on 70 cm the radiation pattern is terrible. The YT clowns have probably never heard of antenna modeling. A better design is to make a 2 m dipole with one (or two) closely spaced (about 1 inch) 70 cm 1/2 wave parasitic element (also called coupled resonator).

If you build the antenna as shown, the computer model predicts 11 dBi gain and a front-to-back ratio of 20 dB. ARRL Lab measurements confirmed the computer-predicted antenna pattern. You may wish to read further about tuning adjustments in The ARRL Handbook. It describes how to check the antenna with a field-strength meter, or by usingMounted to the horizontal cross piece with 2 U clamps, long legged muffler type clamps. Top of antenna is about one inch below the ridge beam. Bottom of antenna is approx 25 feet above ground level. Using 400 flex type cable (ABR brand from HRO). Just try to keep it away from any metal, vents wiring etc.Hi there, G1ZMA kindly decided to build me another antenna for 2m and 70cm and here it is. Amazing what you can achieve with a metre and a bit of old RG58 an...…

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