Hello everyone have a Saturn here giving me the blues. No carrier or modulation found the finals were blown. Changed them out now I have 2 watts carrier no matter where I set the pots. Still no modulation. It receives great shows carrier but no modulation. Put it in PA works great mic gain works echo works. Checked D77-65 ok. IC 4 voltages ok. Am regulator ok. Even had a fellow tech look at it and come up with no answer either and help would be appreciated.