Quote:
Originally Posted by old_tv_nut
Bypassing is a good first test.
Wrapping an additional layer of copper tape:
If the outer layer is a ground layer already, this will not help UNLESS the existing layer is bad somehow (or disconnected from ground).
If there is no outer ground layer on the original, adding one will mess things up, as it will lower the impedance (producing transients) and increase the delay. (UNLESS the underlying layer is bad or disconnected, in which case an added outer layer may fix it).
Regarding caps:
Film caps are generally too large in value to cause short video transients, unless they are meant to be bypasses and are open. Transients can be caused if smaller capacitors or peaking coils associated with the delay line are bad.
Regarding replacement delay lines:
Delay lines are designed for a specific impedance, obtained by the number of turns per inch, their diameter, and the capacitance per inch determined by the copper ground sheet or sheets (under and/or over the windings). So the best bet is to get one from the same TV chassis number. Second choice would be to look for one of similar dimensions, although this wouldn't guarantee the winding count.
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Most CTC-RCAa seem to have the same delay line 15/16/16XL have part #109837 and that site posted above most likely DOES have it, but I have been unable ( so far ) to find a cross reference to that # there HAS to be a Miller cross to RCA #109837, I just dot know how to find it
but as mentioned, I will try the tubes first
I still am not allowed to lift above 15lbs yet, and I'm guessing its the line cause of how ugly it looked, and guessing I won't be able to fix it.
Who knows, I may be able to, the grounding may be lose on it, and may be able to be patched, but if not, I would like to know which new one to get.
As for the caps, i have mainly 2 in mind.
https://i.imgur.com/fnlu7ZN.jpg
C23 & C25
C23 is one of those elenco tube BOMB capacitors that has given me trouble in the IF section ( took it out once ) and C25 is an original orange drop, I have found them to be leaky in the set before, not many, but a few, mostly ones close to tubes.
Will just have too see how things go