ge 802

[leadlike]

On the 802 I worked on, it was tough to get good vertical deflection. Most of the components in that section were toast, and even then, the picture only filled 75% of the screen, and would shrink a little as the set warmed up. I tried a couple of different 6V6s (all tested as good, including the one original to the set), and a new one filled the screen right up.

[old_coot88]

Originally Posted by leadlike

On the 802 I worked on, it was tough to get good vertical deflection. Most of the components in that section were toast, and even then, the picture only filled 75% of the screen, and would shrink a little as the set warmed up.

Whenever there's an electrolytic on the cathode of the v.out stage (which there is in the set under discussion), if the cap goes wonky it will cause insufficient sweep, usually accompanied by bad linearity.

Also (worth bookmarking), a very common problem is the plate load resistor of the v.oscillator which goes high in value over time. That's because it's constantly being hammered by a high level pulse.
Bill(oc)