![]() I ordered the RF board and parts from Communication Concepts but if I was doing it again, I would use an RF deck from W6PQL. Nov 20 - Amplifier fixed and ARRL Sweepstakes.Oct 30 - CQ WW DX and amplifier failure.April 10 - Struggles with the Amplifier but worth it.March 21 - Control circuits for EB104 Amplifier.March 15 - First RF from the EB104 Amplifier.In addition to these notes, you may want to read my blog posts which talk about the design and some of the difficulties getting this working: That was a perfect design given my homebrew radio produces about 5 Watts barefoot. It uses 4 MRF150 FETs in push-pull parallel to acheive 600 Watts from about 6 Watts drive. I wanted to try something different and modern so I setout to build a solid state linear based on the popular EB104 Motorola Engineering Bulletin by Helge Granberg. I wanted more power on HF so that I could make faster progress towards my homebrew DXCC. They never worked that well, but they were a lot of fun to build. This produces a 250 Watt amplifier and has a strip line inductor to match the output. Years back I had helped build a couple of valve (tube in the US) amplifiers using a single 4CX250B on 2 meters. A 600 Watt homebrew Solid State Amplifier and Power SupplyĪmplifiers are a favourite homebrew project.
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