Hi David.....i'm following up a very old post you made back in 2016.? TX inhibit on an FT817.? Did you get to the bottom of it?? Does it work?? It looks like placing 12v on the TX Inhibit pin on the ACC socket prevents RF being transmitted.? I am working on the sequencing for my 10Ghz system and a TX Inhibit would be very useful!
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Thanks, best wishes ...and Happy New Year
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Andrew G0JCC