Help restoring a Vintage Music Man Stingray?

[arkose]

Picked up a 70's Stingray and am looking for some help with the electronics. I know for sure all the pots need to be replaced as they're scratchy beyond what could be fixed with pot cleaner. Having a heck of a time finding direct replacements for the bass and treble pot. (100K Audio and 1Meg Reverse Audio). Anyone know of a source?

Also, it's a non-expoxied board, without the resistor on the jack. Wondering what the likelihood of that being bad is as well? Any sources for that chip and what the resistor value should be would be appreciated!

 

[Rod Trussbroken]

I'd reach out to Ernie Ball Music Man themselves through their Customer Service. The pots suitable for your Bass are those used for the "Old Smoothie" Bass. They are the same physical size (and resistances) as used for Pre-EB instruments. Pots normally used for their other 2EQ preamps are now the physically smaller sized "Nobel" pots (albeit the same resistance values). Volume 25K ohms (linear or audio taper). Treble 1Meg ohms (reverse audio taper). Bass 100K ohms (audio taper).

The chip (LM 4250 CN) may also be available from the same source. Pretty sure the jacks are.

The protection resistor value is a 1K ohm and available from any hobby electronics store.

 

[arkose]

@Rod Trussbroken Thanks for the detailed reply! I'll give this a shot!

 

[kevins]

@Rod Trussbroken Thanks for the detailed reply! I'll give this a shot!

I got a box of lm4250s if musicman don’t got em but I’m sure musicman has them!