CTC5 special, low 145V source

[CJVx]

My AGC is not working correctly, and the audio cathode generated 145V source measures to be around 90v, much lower than expected. This provides the AGC voltages. In order to get the best picture, AGC has to be turned all the way up, and will not get to the point where the picture overloads or even the best picture. Because of this I do believe my sound is suffering as well.

I injected 145V from an isolated power supply, and the AGC works as expected, and the picture was much better at its optimum point. I did unfortunately lose sound during this test since I suppose the audio tube was way over biased.

Anyway, my 390V and 300V sources being generated from the power supply measured to be close, if not a bit over. The audio output tube is as strong as new. I checked and rechecked all associated resistors and all capacitors in the circuit and throughout the TV have been replaced. I feel like this is a common problem with these TVs but I am struggling to solve it. Any ideas?