Zenith 1M30T20 (12" B&W from 1966)

[Adam]

I cleaned the IF transistor sockets and ran the TV for a few hours. That problem didn't come back, I think that fixed it.

The vertical line doesn't move with the horizontal hold, but it does with the horizontal width.

I'd like to get a better CRT in this. Does anyone know if any other tubes cross with a 12BRP4?

[zeno]

Its probably a 12 volt filament & going to be super rare. See what the
EIA number on the CRT label is. If not 343 or 1101 Zenith didnt
build it & may give you a lead on other sources. GE, RCA, Motorola
& Sylvania all built this type set & may have used the same jug.

73 Zeno
LFOD !

Originally Posted by Adam

I cleaned the IF transistor sockets and ran the TV for a few hours. That problem didn't come back, I think that fixed it.

The vertical line doesn't move with the horizontal hold, but it does with the horizontal width.

I'd like to get a better CRT in this. Does anyone know if any other tubes cross with a 12BRP4?