Tag Archives: amplifier

70W HF Linear Amplifier Project

Posted on February 1, 2020 by Steve Netting OH3SPN

Whilst very happy with the performance of the Hermes SDR, I’ve been considering a matching HF linear to provide a moderate (6-9dB) increase in output power. I have ideas about operating portable using battery power; ~50W seems a nice balance … Continue reading →

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Amplifier PTT Buffer Schematic

Posted on June 10, 2015 by Steve Netting OH3SPN

I’ve been keying my KW1000 linear using a relay to buffer the FT847.  The FT847 closed a 12V circuit across the relay and the relay in turn keyed whatever voltage/current the linear requires.  The relay in the KW1000 is old, large … Continue reading →

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