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Hoffman Amps Forum image Author Topic: Super Reverb cap job, replace resistors?  (Read 1775 times)

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Offline Mars-Hall

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Super Reverb cap job, replace resistors?
« on: March 20, 2020, 10:03:29 pm »
Is it standard procedure to place all resistors on the cap board when replacing the caps or if they read good reuse them?  If I do replace, use metal film?
“I love being alive and I will be the best man I possibly can. I will take love wherever I find it and offer it to everyone who will take it. Seek knowledge from those wiser and teach those who wish to learn from me.”  Duane Allman

Offline nandrewjackson

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Re: Super Reverb cap job, replace resistors?
« Reply #1 on: March 21, 2020, 12:26:53 am »
If they read good AND dont *look* fried, sure, leave them.  If one reads ok, but looks crispy, I'd change that one.


OR


if you have good parts in stock, go ahead and change them all out.








Offline Latole

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Re: Super Reverb cap job, replace resistors?
« Reply #2 on: March 23, 2020, 10:45:23 am »
Tubes plates resistors may read good, look good but they come noisy. Replace them.

Offline jjasilli

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Re: Super Reverb cap job, replace resistors?
« Reply #3 on: March 23, 2020, 11:17:02 am »
My procedure: replace the entire PS including plate R's.  Verify values of K R's and bypass caps, or just replace those too.


The reason is that the components in the PS tend to age together.  Replacing some components may trigger remaining components to fail resulting in a series of failures.  Maybe OK in one's own amp, but a customer may feel that the tech is incompetent.


IMHO the only reason not to do the foregoing is to keep a vintage amp as stock as possible.  With this I don't agree if the amp is to be used, and at least one component must be changed anyway.

 


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