#1
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CTC12 vertical
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Last edited by andy; 12-05-2021 at 08:42 PM. |
#2
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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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#3
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Last edited by andy; 12-05-2021 at 08:42 PM. |
#4
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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.
__________________
Bryan |
#5
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Last edited by andy; 12-05-2021 at 08:42 PM. |
Audiokarma |
#6
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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 |
#7
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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. |
#8
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Last edited by andy; 12-06-2021 at 12:00 PM. |
#9
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Varistor. 1480v 15% 10ma. RCA # 112876
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#10
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Last edited by andy; 12-05-2021 at 08:42 PM. |
Audiokarma |
#11
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Last edited by andy; 12-05-2021 at 08:42 PM. |
#12
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hmm. how can you determine the amount of hours on the chassis?
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#13
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Last edited by andy; 12-05-2021 at 08:42 PM. |
#14
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Oh. I see. I wasn't asking it as a smartass question BTW.
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#15
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Last edited by andy; 12-05-2021 at 08:42 PM. |
Audiokarma |
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