Ken, I do have an O-scope. So your saying to remove the PTO signal wire from R48 and then measure the PTO output signal voltage.
Then re-connect the PTO signal wire back to R48 and use the O-scope to measure the voltage to where the PTO signal wire gets connected to R48 and check to see how
much of a voltage drop I get?
Well I believe I would get some kind of a voltage drop.
I think since I have also a TR-4CW is to do the same two measurements to my other rig so that I know what the voltage measurements on an O-scope should be otherwise I would not know if the 2 measurements on my TR-4CW/RIT are correct.
Mark
Mark N2DMI