That's interesting, as the Colt looks to be a 'high power FM' variant of the 121 chassis where (as in the Hy-gain V) the finals run on the raw supply voltage in FM TX mode.
Only in AM mode do the finals run on the output from the emitter of the AM Darlington.
DC voltage measurements done in the presence of large amounts of RF are likely to be rough at best, that's why I asked you to do them in RX mode and not in TX mode, as you might reasonably have expected.
So the next thing is to do those scope measurements to see if the driver and output are amplifying. You might want to keep the scope a bit handier for a while.
