Hello all!

I'm trying to diagnose an issue on an old ACC Shack Master SM100.

Overall the device is working fairly well but the secondary transmitter
stage in the SM will not activate for the COS. I've tried other radios and
all have the same symptom. Cross band repeat does not activate from Primary
RX to Secondary TX. I can force the issue with the COS bypass codes as if I
were accessing the SM from the telephone but even after swapping radios, and
confirming the High/low state in the controller programming, this feature
just will not activate without the *.

Any tips would be greatly appreciated!

TIA!

Jim..

jim (AT) manicarcade (DOT) you know what