Centre toggle position = lower volume .... why?

[iiipopes]

0.01 is probably more than adequate. 0.1 will simply have a lower Fc and further assures you lose none of your signal--if that's what you're after. Sticking the cap on the bridge pickup, like Scott said, is the other way to be safe.

Indeed. Thanks. I do lose a little output on the bridge pickup this way on my fanned fret P-style bass with the HB-1, but I don't really ever "solo" on it. It's my trench bass, and with the current bands I gig with and their repertoire, I mainly use the HB-1 in the D-G P-bass position and the treble pickup is more there to bring it up a little to lend definition and clarity, depending on what the song requires, rather than as a full-bore treble pickup for something like a "Jaco-esque" burpy solo tone. For that I use my 4002 with Progressives for the burpy/prog/80's/need treble/solo cut/heavy metal/etc. tones.

[vulcan_creedler]

I have exactly the same on my 88 4003!

I have a modern (adjustable poles) hi gain in the bridge, and an HB1 in the neck.

I switched polarity on the HB-1,and WOW - the bass had all its balls back and more!!!!! Vast improvement. In hindsight, my only regret is not keeping the hi gain in the neck, and puutting the HB1 in the bridge, but I suspect there's not a lot of difference! not the way I play, anyway!

Joking aside, it seems that the hi-gains and the HB-1 pickups are naturally out of phase. A high gain only has a hot wire and shield, but the HB-1 has plenty of configurations, so is easier to change. If you don't' want to unsolder the pcb, simply put the blue wire to hot, and the red wire to ground!

Right - not wanting to offend the forum, and still perusing the rules, I'm not sure of the etiquette of selling/swapping kit here! Cutting straight to the chase, I have a 4003 1983 bridge pickup with non adjustable "vintage" poles etc. As well as being identical to my 4001 bridge pickup, it is standard 7.8K, alas without the chrome ring but a new pair of mounting screws and the big wide base plate, if anybody wants to swap it for a neck/rhythm bass 11k hi-gain (preferably with the adjustable poles, I'd be a very happy chap!