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PTT does not key my PW1 amplifier

Bruce Elbert
Bruce Elbert Member ✭✭
edited July 2018 in SmartSDR for Windows
This is a new 6300 which is up and running with DDutil 3 and DAX to control the PW1 frequency and connect to PC software. But, it does not key over the PTT cable and TX 1. I checked the voltage on the PTT line and it reads about  3.5V DC constant, even as I push the MOX button on SmartSDR. I can key PTT on the PW1 by grounding the cable. I tried all of the recommended software settings in these posts. Is it a hardware issue or other? Thanks. 73, Bruce K6ZB

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