Diy 2m 70cm diplexer, You can probably go as far as 40-50 Watt, but keep your transmissions a little shorter. Naturally I decided that if I was going to build one, I was going to do it right - the coolest Yagi on the block, the envy of the nearest ham-vention if you will V/UHF Yagi Diplexer Jul 3, 2022 · The project is based on Bp-Br cavities. I asked Comet about making a single compact unit that takes 2m/70cm on one port and 1. Aug 29, 2025 · Friday, August 29, 2025 Building and testing an eBay diplexer kit for 2m/70cm The recent purchase of a UV-Pro has me in need of a satellite antenna for the "Easy-Sats" and International Space Station. This diplxer is for a maximum power of 25 Watt (both 2m and 70cm, even at the same time). Mick Stwertnik told me that they designed and specced it out, but the cost would be a Dec 15, 2018 · For example, if you were transmitting 50W on 2m would you be happy if 0. Jun 23, 2025 · 2m-70 cm diplexer With this diplexer, you can connect a 2m 144-146 MHz and 70cm 430-440 MHz transmitter to a single dualband antenna, or a dualband transmitter to two seperate antennas This DIPLEXER separates 2m from 70cm on the same coax cable. The big advantage with this is the ability to work on two (or more) bands simultaneously! You might have a rig with one output connector, that works on say 2m & 70cm, or 6m & 2m. 25m on the other. Feb 27, 2015 · A small and simple Chebyshev based 2m / 70cm diplexer you can build for working satellites with your HT radio. This particular project is called AL100 (as it is an aluminium cavity diameter 4 inches – 100 mm) If you decide to follow my project, it will give you cavities with the 55dB notch attenuation (per cavity!) for 9MHz split @ 70cm UHF band and only 0. 50mW represents 30dB of isolation and even this diplexer does not achieve that. I took the design, added a lowpass filter to the 2m branch 2m / 70cm diplexer With this diplexer, you can connect a 2m (144-146 MHz) and 70cm (430-440 MHz) transmitter to a single dualband antenna, or a dualband transmitter to two seperate antennas. For the case of beams for 2m & 6m and/or 10m, a diplexer centred at 85Mhz will allow you to connect to both beams at once, and simply change bands on the rig, or scan, as you like. Tune to a strong 144MHz signal and adjust C4 for minimum S-meter reading. Mar 19, 2023 · DIY HOMEMADE DUAL BAND VHF & UHF (2 Meter & 70 Centimeter) TUNEABLE ANTENNA Sheepdog777 Mar 19, 2023 2 meter 70cm antenna diy dual band ham homemade tune uhf vhf. 25m/70cm), one requires a triplexer and diplexer. Jul 29, 2018 · Hi, since I’m thinking about upgrading my ground station with a 70cm antenna, I decided try designing an antenna diplexer. Now connect the 144MHz rig to the 70cm output on the diplexer and the 433MHz rig to the 2m output. 5W was making it's way to the 70cm radio? I wouldn't connect a handheld directly to a radio and press transmit on the handheld. Even 0. I'd like to cut down on the number and size of equipment to do this. 3dB loose at the resonance frequency (per cavity!). Where did I get the 88Mhz from? Take Oct 12, 2019 · Description Ham Radio 2M /70CM Yagi Diplexer I needed a small-ish collapsible Yagi-Uda antenna for portable use. If you want to use more Jan 13, 2024 · DIY 2 meter / 70 cm bandpass filter for satellites. 25m radio to a triband antenna (2m/1. Discussion in ' Videos, Podcasts, & Blogs ' started by K4SDV, Jan 13, 2024. In order to connect a 2m/70cm radio and a 1. It allows to use 2 antennas over the same cable and permits transmission on one band and simultaneous receiption on the other band, when connected on the side of the antennas. Or use 2 equipments (one VHF and one UHF) when used on the side of the transceivers. 05W, or 50mW, would make me uncomfortable. After some googling for existing schematics I came across the micro-diplexer by kw4fb, which has some really nice component values allowing it to be build from SMD components without winding your own inductors. Arrow makes the perfect antenna but I thought I could homebrew one at a much lower price.
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