[Charlie]

Was really rainy,cold, and nasty here today, so I spent the whole day in the garage trying to make heads or tails of the problems I've got on this set.

After an entire day, and damn-near rebuilding the deflection board, I finally got the horizontal to lock... and it seems it had nothing to do with all the caps and resistors I changed. In fact, I felt like a dumbass once I figured it out. No, it wasn't a tube... I wouldn't even admit to that. The only reason I'm gonna mention this is because it just goes to show how simple a problem can be... especially when we beat ourselves over the head trying to figure it out.

Changing the caps and resistors never made any changes on the screen. It acted the same way with the new parts as it did with the old parts. Finally, I gave the horz osc / waveform coil a half turn to the left, and everything locked perfectly! Damn! That's all it needed! I had never even considered that coil because I would have suspected that coil would never get touched by anyone. Well, guess i was wrong. So, now it locks perfectly.

Still has the brightness problem... kinda on the dim side and changes only slightly while turning the brightness knob. I changed the caps and resistors Doug mentioned, but no change. I then changed many resistors and caps near the 12BY7 tube. That seems to have made a little difference Now i get a very faint red line when I move the service switch to the left... before i got nothing. In fact, the faint red line doesn't quite make it all acorss the screen... only part of it. Oh well... it's a start in the right direction. Also noticed the plate voltage on pin 7 is low. Supposed to be 310 volts and I get about 240 volts.

Before I finally quit for the night, I noticed the burst amp 6EW6 shows voltages way out of whack. The worst pins were 5 and 6. Pin five should have 50 volts on it... instead it reads about 395 volts. Pin 6 is supposed to have 265 volts, but reads 400 volts. Damn... that's way off!

Well, I'll be back on the bench tomorrow with it. Supposed to be rainy again.