>If you use Joe's solution where PTT is one input into an AND gate, if PTT is
>not asserted, your relays will not close. All inputs to the AND gate must be
>present for the output to change state. 

I've wanted this 'feature request' since K3 Day 1.
Don's solution sounds like a reasonable work-around.
Unfortunately, I'm transistorially challenged.
Can I build this with a few 12AU7s ?

Ralph, VE7XF

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