CTC12 vertical
 

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on my set i replaced the orange drop capacitors on that board and then all was well. steve

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I had vertical issues with one of those RCA 18" hybrids-only replacing the orange drops (probably maroon) took care of the problem. In that case, with a vertical chassis, heat seemed to have killed them. I would agree though that 9 times out of 10 those caps are good. Also make sure the pots are good. I spent a good amount of time troubleshooting one set with a short verticle only to find that either the height or lin (can't recall) was burnt. It worked to a point but not fully.

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Isnt there an tubular electrolytic in that circuit? No schematic in front of me right now, but I think it causes insufficient deflection if it's bad.

John

yep, bad orange drops do happen occasionally. Lots of times the zenith table b/w sets will have short vertical. Ive found it to be a bad (leaky) maroon drop .0068uF in the output circuit. Had this happen about 3 times already (different sets of course).
I lost vertical sweep in a CTC-16 I bought from Tim a few years back. that was caused by a shorted orange drop which in turn smoked the B+ dropping resistor to the vertical output plate. I can't remember exactly but it was something like a .1uF. Faulty mylars are indeed a rare occurance though.

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Varistor. 1480v 15% 10ma. RCA # 112876

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hmm. how can you determine the amount of hours on the chassis?

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Oh. I see. I wasn't asking it as a smartass question BTW.

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Chester Electronics in Largo, Fla
 

had some old stuff like varistors for sets but I won't be likely to visit there for a month or so.

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Check the electrolytic cap in the vertical output cathode that feeds the convergence panel(which must be plugged in). Make sure the solder grounds on the vertical PC are solid.