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PTT delay time thoughts!


 

The bitx40 has two cascaded relays. One is the PTT activated one and the other is activated from the first.

These relays on my board "VRS.." have some <7ms according to the data sheet. So two relays cascaded would
have up to 15ms delay.

It will be better to power both relays from the PTT but this will put undue current stress on the PTT
switch. Fix: Add a couple of transistor to handle the PTT and drive the relays.

This is my next hack when I get back to my town house bench!

Any thoughts?

73

--
Raj, vu2zap
Kodagu/Coorg

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