Just remember the PTT is dealing with 12V and you never want that going to any input/output of the Raduino. The only exception is the 12 volts sent to the 5 volt regulator via the orange wire on the oscillator plug.
Hi Fred and others thanks for your remarks and clarifications. Well definitely something to look into or maybe just wire the PTT wires into the Raduino as well so that it knows the BiTx40 is in Tx ?
All good fun and experimentation for sure and learning lots!
