The 630M MOPA (89/802/811) was displayed at the Dayton Hamvention as part of the homebrew theme this year. Plenty of questions were asked and photos taken like the one below!
NO3M
Amateur Radio
Tag: homebrew (page 1 of 3)
Tubes
89 Hartley ECO
802 Buffer
Band Coils: 630M, 160M, 80M, 40M, 30M, 20M, 15M
630M MOPA (Master Oscillator – Power Amplifier) consists of an 809 “High-C” Hartley capacitively coupled to a push-pull power amplifier, either running 809s or 811s.
Power output is on the order of 100-165W with 1600V on the amplifier tube plates. CW note is clean and stable (slight chirp reported over the air).
Recording: 630m-MOPA-single-2014-10-22-2.mp3
160M Four Square + 630M Vertical
1930s PP 814 Transmitter
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