Good afternoon Mike
Thanks for confirming the Strapping PCB's as identical.
When I push the PTT button and refresh the status at the control end, PTT status indicates 'ON'
The headphones (plugged into the RRC) mute, and the Mic is enabled but the K3s doesn't switch to TX. The only way I can do that is with the front panel XMIT button.
If I use the K3s in 'Normal' mode, Mic/Footswitch work fine.
I'm wondering if this is a K3 issue and nothing to do with your kit -- which I must say is now working superbly well in terms of quality both ways if I use the XMIT button on the K3s -- even on a terrible Internet connection!
73
Bruce G4ABX