When they say to NOT apply any voltage to the ptt pin for rig control, how little voltage is typically OK without risking damage to the radio?
The PTT keying circuits that use the RTS serial pin usually have around 8V and the circuits clamp that with a diode, but there is still going to be 1/2 volt.
Just don't want to blow something in the radio...
The PTT keying circuits that use the RTS serial pin usually have around 8V and the circuits clamp that with a diode, but there is still going to be 1/2 volt.
Just don't want to blow something in the radio...