I spent about an hour and a half doing a string change and setup, then I played for another three hours. I
think I understand the electronics now. It's complicated, but not prohibitively so... the mistake (as I'm sure you have already realized...

) is to try and curve offa' how we know Series electronics work... and it just isn't like that. I'm probably not going to describe it correctly, but I figured out within an hour how to dial in what I wanted. It's some kind of parametric equalizer, but not really. I'll try my best to describe what it does, or maybe just post a YouTube of it. The handiest thing... you can just cut that part off... bypassing is as simple as flipping a ball-bat switch. And of course, it didn't take a genius to figure out, you can set this up so you have two completely different tone shapes available, and [wait for it] SWITCHABLE!
C'mon man... and bring your M.K. Elfin witcha'. And a 4004. And that super-sweet double cutaway custom Martin OM. And... that sexy little Japanese number too, iffn' you got room.
I didn't caption them, 'cause I was dog-tired, but the Hyak scroll-body fretless in the front there has a kinda'-sorta' indirect Turner link. Brian Smith was a former Alembic employee who had apprenticed with Rick in the shop there in the very early days. He later set up shop in Bellevue, Washington and began building his own line of graphite-reinforced neck-through basses and guitars. My understanding is production only lasted from 1976-79. Mine is a 1978, and while totally playable, it's a restoration project in progress. (I had specifically been watching for one of these, and picked this one up recently) I
may end up installing some electronics from RT in it... that's a feasibility conversation I'll have to have with The Bossman sometime. Right now, it only has a passive tone circuit, but retains its original pickups. The original electronics ran on an almost unbelievable 36v power supply or four 9v batteries. There were very few people on Planet Earth back then who had a clue how to work on them, so not many of the remaining Hyak instruments have their original parts. Anyway. That's that thing... it's a really sweet old bass, very resonant, feels alive in your hands. It's just a bit anemic without anything much driving those old pickups. But I know a couple folks...
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The other photo-bomb is a 1980 Series I Alembic, soon headed home to California to be outfitted with an upgraded preamp card, some modern RF noise-canceling doo-dads, and while it's on The Wizard's Workbench for this 40-year tune-up, it'll get Series II CVQ's, and a little TLC from the Ladies before coming back to Virginia.
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Just a twinge of irony... the Turner Model One might be the antithesis of a Series bass, and might never have existed had that final split not happened. This one in particular was built just as RT was cranking out his first-run batch of 1980 Model Ones. For all the bad blood, I always hope one day the old partners can bury the hatchet... they did so many great things together, and apart.
"Peacemaker take your time, wait for the dark of night, soon all the suns will rise..." ~L. Buckingham