|
If I were you, I'd re-replace the old tubes and when you see the dark area at the bottom of the screen again, replace the 6GF7 vertical output tube with the new one that you have onhand. Leave all the originals in place, and continue to troubleshoot. Check your soldering, as you can easily have a solder bridge somewhere. I thinks you really need to pull the chassis and tuner so you can see whats what, and DONT grind up metal shavings to check the tube sockets. Metal shavings are BAD!
Chances are that most of your original tubes are probably still good. Ive seen some 45+ year old tubes that still check in the high GOOD area after some tubes in the same sets have been replaced again and again...
|