Thanks, Raj. I do get a good signal from TO3 right up to the base of Q911, but not after that transistor, which is why I am looking there, but the power indication (only about a watt) when I probe that section is puzzling, for sure. However, I am using an unshielded set of leads and RF probe circuit, so it may be radiating enough signal to partially be picked up by following stages, perhaps.
And roger on low supply voltages, a known situation. When I built his I was concerned about use from a relatively unregulated power source (actually a car) where the voltage can approach 15v, and also the opportunity to run higher voltages to get more power without damaging the circuits. So I made a 12v regulator circuit that feeds everything except the PA transistors. The source I am using in the shack is 13.4v, but that isn't enough to regulate, and more use is in the field where I am using a 12v Lithium pack, so even worse, so internal voltages of 10-11v are common. I have found the rig operates well until the internal voltage gets down to around 9v, but since I never use it on the original higher voltage I plan to remove that regulator since it isn't helping anything. Just haven gotten around to that since it is packed into the corner where the power comes in.
=Vic=
Vic WA4THR