|
Sams wants you to have 1.5K Ohms between V20 pin3 and ground, not 136K. The path to ground is thru R98/99, R109A, and R109B, which add up to (roughly) the 1.5K. Because your PS voltages are correct, I have to assume R109 is in good shape. Your R98/99 pair must be smoked open from 110 ohms to more than 100K Ohms. Replace them. R97, at 1 meg, will likely have drifted high too. Check and replace if necessary. R96 you already know is bad. Replacing these ought to get you back to a safe grid bias voltage and you won't blow any more HO tubes. I assume the capacitors in this circuit, if paper, have already been replaced with orange drops. If not, do so. Hope this helps.
- Kirk
|