Re: How to bring "down" PTT?


The PTT Output on DRAWS is an open collector NPN Transistor. It expects the Radio to have a pullup to Positive voltage, typically 5-12V.

If the PTT LED goes off then the SW has done its job.

Measure the voltage on PTT when yo power up, then again when you PTT and release.

Bryan K7UDR

Join to automatically receive all group messages.