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Deoxit and amp maintenance 
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The Princeton Chorus pots are feeling stiff and a little scratchy. I'm thinking of opening it up and spraying Deoxit in them.

So I've seen several YouTube videos, some where they just give a little spritz and some where they really drench the pots. What's your preference?

Some people also spray other parts of the circuit board but I don't know if that's a good idea. I'm assuming I should at least hit all the jacks?

Is it worth changing the reverb tank? It sounds ok but not fabulous. Probably about 25 years old at this point.

Is there anything else that should be done in there while I have the amp open?

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Wed Jun 13, 2018 11:50 am
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I just spray into the access hole. Just a little bit. Turn vigorously and repeat.

I wouldn’t change the Reverb tank unless it’s broken.

You may want to check for bulging caps while you’re in there.

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Wed Jun 13, 2018 11:53 am
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Diocide wrote:
I just spray into the access hole. Just a little bit. Turn vigorously and repeat.

I wouldn’t change the Reverb tank unless it’s broken.

You may want to check for bulging caps while you’re in there.


thanks. I will leave the reverb tank alone then, go easy with the spraying, and check the caps.

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Wed Jun 13, 2018 12:01 pm
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I do not flood out pots , I have been told it can ruin some wipers in some old pots but have not experienced that but I still go easy .,also DeOxit cleans solder flux that and other debris can short a circuit if it's jumped between components as it's conductive iirc so spraying it off with that stuff is harmless if you are able to properly clean it and blow it out . I don't like to fix things that aren't broken so go easy and don't kill yourself whilst working on your amp .

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Wed Jun 13, 2018 12:12 pm
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fretless wrote:
I do not flood out pots , I have been told it can ruin some wipers in some old pots but have not experienced that but I still go easy .,also DeOxit cleans solder flux that and other debris can short a circuit if it's jumped between components as it's conductive iirc so spraying it off with that stuff is harmless if you are able to properly clean it and blow it out . I don't like to fix things that aren't broken so go easy and don't kill yourself whilst working on your amp .


:lol: maybe I should just live with it. It's weird the pots are really stiff and seem to be getting more so.

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Wed Jun 13, 2018 12:53 pm
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Diocide wrote:
I just spray into the access hole. Just a little bit. Turn vigorously and repeat.

I wouldn’t change the Reverb tank unless it’s broken.

You may want to check for bulging caps while you’re in there.


This is what I do for scratchy pots. about 10 years ago the dude from FJA mods said that you should turn the knobs every once in a while to help prevent building (i have not actual merit to prove this, but it seems logical that turning the knobs help keep them operational).

Other than that, I stick with compressed air for cleaning the other innards.


Thu Jun 14, 2018 1:50 pm
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use no more than is necessary.
as for jacks, i use the pistol barrel brass scrubbers you can get from walmart or a gun store. spray a little deoxit on them and work them back and forth a few times.


Thu Jun 14, 2018 6:38 pm
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mgraves wrote:
use no more than is necessary.
as for jacks, i use the pistol barrel brass scrubbers you can get from walmart or a gun store. spray a little deoxit on them and work them back and forth a few times.

Quarter inch jack, so did you use a .243 rifle brush?

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