Quote:
Originally Posted by kvflyer
Surely you have considered grid emission of the output tube? However... that is usually with tubes in radios which have a very high filament voltage, like a 50C5 etc. But not unheard of with other "output" tubes.
Hope you "Gitter Going".
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Lol.
I had the most frustration yesterday with the vertical. A spade connector in the yoke bent in a way that made it so there was lousy connection and barley any deflection and I wasted a lot of time troubleshooting my replacement K networks (K1 which still tested good went back in). But it now works about perfect (besides the centering rings being dead).
I changed a few off tolerance resistors in the audio but didn't find anything terrible. The tubes on the other hand....All 3 audio tubes had issues. The original Zenith branded 6KT8 and 6BQ5 were both testing bad and the 6BN6 had a short in it. All 3 got swapped and after an hour I did have more buzz on scenes with a lot of white. I got about %95 of that adjusted out by tweaking the buzz control and dialing back the AGC (the AGC did the most).
Some of my lytics are getting warm and I'm thinking about changing them.