A spa in northern california is definitely in the long term plans.! It has a bizarre squeezing-piglet-squeel with the Q's in the max position and the tone pots at about 12 o'clock which is beyond my comprehention. I won't even TRY to explain it.. It need's to be looked at by an (even..) more competent person.. Hehe..
The only thing holding me back from sending the electronics is the lead time on the work, price (believe it or not..) and the fact I've not had that much actual playing time on it since I started refurbing it back in August.
The reason for changing the volumepots is a looong loong story...
Short version is I broke one of the Q-switches while reassembling it, the replacements weren't a direct fit (old one's out of production), old volume pots (you can get a glimbse of them on the top picture) also different from the new one's, had to change these for the Q's to reach their holes, and the rest you know..
I had the pots out of the bass when measuring them, yes. Now I have one of the new ones (@10.3 ohms) and one of the old ones without it's baseplate (@11.4 ohms) and the levels aren't that far from being level. Which is easy to bias out with the trimpots. This tells me two things:
1. my preamp board is working fine. (Yay!!)
2. need to get new volume pots...
(3. ma'bass is ready to groove!)
I made a thread when starting my refurb promising alot of pictures, and I'm just about ready to start uploading them. Stay tuned for the piccies there.
I've been in contact with Mica, and indirectly the Ron-someness himself ever since I started, and they've been OUT OF THIS WORLD helpful. I even got a handwritten complete schematic of the circuit from Ron. Without it it would have been next to impossible for me to work on it.
I mean, the circuitry is more complicated than alot of instrument amplifier circuits up until the solid-stage-age..!
