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Well those v1 v2 7-and 8 voltages are wrong and L4 and L5 shows they each have a .001 inside why couldn’t they be changed.
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I looked inside there is ceramic caps in L4 L5 I would have to clip the ground to see if they are bad or shorted
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if they are messed with, it will shift the alignment. |
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very delicate, the slightest touch can change it, |
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3w resistors are rather cheap now, and much smaller and run cooler than in the 60s, replacing them all won't cost much more than $10, and make SURE 100% that it's not a resistor problem, which is a good thing to do before looking at caps IMOH.
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Same as the 2 .001 caps what’s the likelihood of both of those caps being bad. They are ceramics and I’m surprised that it wouldn’t be mica caps in such a circuit.
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Ceramics almost never fail and when they do it's usually in sweep circuits where they're being whacked with several KV worth of pulses, not <300VDC and <3VAC that the IF subjects them to...
If you are concerned about the ceramic caps in the IF leaking current I gave you great advice before... Temporarily stick a cap 100X the capacitance in series. It will stop DC leakage and the series capacitance will be almost exactly the same as the original part alone. |
The bulletproof-ness of ceramic caps is a fact. The only defective one I ever encountered was inside the motor of a cassette player. The complaint was sporadic overspeed. The motor had a 3-segment commutator, with 3 tiny ceramic caps bridging the gaps between segments. One of the caps was leaky, and replacing it cured the speed problem.
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Since you stated that the voltages on pins 7-8 of the V1-V2 are wrong, but the 6EH7s are NOS, and the problem is not a bias 275v problem and extremely unlikely to be disc cap related, then once again the best path is to replace the power resistors, no matter how they seem to check out.
List here. main power diodes https://www.mouser.com/ProductDetail...2B4kkscA%3D%3D 6.8k 3w (r40, r49) https://www.mouser.com/ProductDetail...0BKWoLFQ%3D%3D 2.7k 3w (r41, r50) https://www.mouser.com/ProductDetail...Wwtn4Z2Q%3D%3D 8.2k 3w (r39 , r48 ) https://www.mouser.com/ProductDetail...2a7TUHog%3D%3D Yes, use all 3w resistors, they will be smaller then the ones replaced, and much more reliable. In fact replacing all resistors in the IF may be the only way to get it working again, and even then, you may not be able to. |
When using the ohms chart for tube sockets use with tube in or out.
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I’m getting a really bad reading on pin 8 of v1 should be 3200ohms 3.2k I’m getting 6.30k I figured I would check resistance on v1 and v2
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