Talk About Smoking Pot
Posted on Sep 29, 2008 under Amplifiers & Amps |For all you that thought this was something else, you were wrong as usual… Back to old Sunn Amp - the Volume Control was what I was really seeking and no longer available. After going through extensive catalogs and finding the NOS part is not available, and if it was, would run us about 200.00.
I decided I would re-build the old Volume Control or Pot which is 15K and no longer available - I came to the decision after trying a 25 K and an 18 K which degraded the amp very badly - sort of like a cat screaming when he was on a hot tin roof. I opened the sucker up, with my tube of Di Electric Silicone Grease, I smeared it across the wipers, making sure not to over lubricate as men are known to do.
I put this all back together, and being a dumb-ass and having cut it out of the amp the lead lugs I had to re-solder the lugs together, reinstall it into the amp and walla, the amp was pretty much back to normal, except a small hair line fracture glitch at the number 7th position.
Which means the wiper is worn out beyond repair. Everything works fantastically except at 7 - The moral of the story is don’t be afraid to re-build old pots, because their quality is much better than the newer stuff and will take the re-build.
If you are a little leary of doing this yourself, please feel free to contact me at buck at bucksguitarmodifications.com and I would be more than happy to help!
Talk about Smoking Pot!
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October 2nd, 2008 at 1:15 pm
Excellent blog Buck, you crack me up!!!!
I kept reading, thinking when is he getting to the pot part?
Oh yea, that is a pot!!
KJ
October 8th, 2008 at 12:00 pm
Buck, what is up? I have lots of pot(entiometer)experience, and I agree that rebuilding pots is cool and viable for out of production stuff. It is hard though to fix the worn areas of tape. When I did transmission work, bad pots of some sort caused all types of problems. Especially problems that can be elusive.
October 30th, 2008 at 9:09 am
[...] cohorts and friends who also blogs about guitars wrote an article about potentiometers. Buck from Buck’s Guitar Modifications posted a nice article about rebuilding pots. I don’t have a beef at all, in fact I agree with [...]