Tag Archives: protection

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 →

Posted in Uncategorized | Tagged , , , , , , , | 2 Comments

Over Voltage Protection

Posted on October 24, 2016 by Steve Netting OH3SPN

I recently re-homed several cheap 13.8V linear PSUs from rallies, ranging from 3 to 10A. My intention is to power smaller items of equipment; TNCs, FT817s and similar. However, after inspection it became apparent that all lacked any form over over … Continue reading →

Posted in Uncategorized | Tagged , , , , | 2 Comments