Quote:
Originally Posted by VintagePC
the result is a set that works perfectly with one tube, but not another that is slightly out of spec. Both tubes will still test good
|
I have found that to be the case with oscillator tubes, especially. Sometimes I have had to swap in several horizontal oscillator tubes before finding one that the TV "liked."
Speaking of oscillators, are the voltages on V13 still as far off as before?
Looking at waveforms with a scope seems sensible. This schematic doesn't give models, but you could start by looking at the grids of V13 (oscillator) and V14 (output) and posting photos of what the scope traces look like there.
Phil Nelson