开云体育

"Keeping with GM3SEK's original design philosophy, the boards could be re-engineered with a modern microcontroller that could also implement a versatile sequencer function, thermal protection, along with surface mount components. I could take a crack at this sometime this spring when I expect to have more time. It would be completely open-source using KiCAD for PCB layout and a Github page for community collaboration.

Mike WB2FKO"

Hey Mike that would be an interesting concept, having a heater timer that could be set for the popular warmup times, including 6 minutes for the YC-156 (do folks still find those tubes anymore?). I started to say there are SMD optoisolators at $.75 each but if I were making it I would use a 6 pin socketed variety so they can be replaced when/if something causes one to fail from excessive current or rf getting into it.? On that subj, be sure to put rf bypassing on I/O pins to keep rf from regurgitating it like the Alpha Radio linears did when they first came out.? I forget the model but it had a row of LED's on the front panel, it tested good into a dummy load at the factory but the first couple of customers found it went bonkers when they used 80M and had rf in the shack so they returned them for Gordon to add rf bypass or ferrite beads or something on the micro. Just a thought but as they say, history seems to repeat itself.

73,? Reid? W6MTF