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PJ bass with the split coil wired with series/parallel switch?

Yes. It works with certain pickup combos. My 80's Maton has those old cream dimarzios and the P is really hot and mid-rangey. The bass originally had a series-parallel switch that operated on both pickups at once, and the first mod I did was to disconnect the J from the switch so I could have the P in parallel and the J remain in series. IMHO the pair worked much better this way. The outputs matched better, they blended more gradually and evenly, and the brighter hollow sound of the parallel P was a good foil for the middy tone of the J.
 
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Yes. It works with certain pickup combos. My 80's Maton has those old cream dimarzios and the P is really hot and mid-rangey. The bass originally had a series-parallel switch that operated on both pickups at once, and the first mod I did was to disconnect the J from the switch so I could have the P in parallel and the J remain in series. IMHO the pair worked much better this way. The outputs matched better, they blended more gradually and evenly, and the brighter hollow sound of the parallel P was a good foil for the middy tone of the J.

Thanks for the info! I was thinking about trying this with either a Dimarzio model PJ or EMG Geezer PJ set, both very heavy in the mids and with much higher P output compared to the J, so this might work here.
 
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I have both sets, I wouldn't cut the GZR for passive expecting it to work as well as the Dimarzio set.

SD 1/4 lbers work just as well as the DiMarzios for this application.

What RobbieK mentioned is something I do a lot with a Warwick $$ with Nordstrand Bigmans. I should throw a deafeatable blend option and a 3-way selector switch on that bass. In his case the pickups were paired and he kicked off his J so it's acting like the bass in the video. I'd just get a push-pull pot for the P.
 
My only moddable P/J is loaded with Wilde P46/J45L wired with a series/parallel on the P46 via a push/pull volume pot. It's then routed to volume/blend/tone knobs. Having the P in parallel really does emulate a Jazz bass nicely and I use that tone often. The P46 in parallel is actually brighter than the J45. Like the video, that bass covers a lot of ground in my cover band.
 
j pup(s) that have split coils with 4 wires

Nordstrand has a split-coil J-type, but it's only 2 leads.

Fralin's are made to order, so you could contact Lindy directly & ask if they have 4 leads for parallel/series switching:

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In parallel you might want to have them overwound 5 or 10% so they're not weak.
However, this will make them darker in series.
 
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This is a split-coil J-type pickup:
Nordstrand_Pickups_NJ4SE_NoCover_Jazz_Bass_800x.jpg
 
I know this is an old-ish thread however i have been pondering whether or not i would benefit much from a cap and resistor (pass filter) on the volume pot of the P (on a pj) with ser-par on the P. Or would simply switching to a linear pot for the p-pup vol be sufficient. Anyone know what values to start with for a super hot 21.6k p-pup array? Would prolly try the cap-resistor type setup in series first.
 
I know this is an old-ish thread however i have been pondering whether or not i would benefit much from a cap and resistor (pass filter) on the volume pot of the P (on a pj) with ser-par on the P. Or would simply switching to a linear pot for the p-pup vol be sufficient. Anyone know what values to start with for a super hot 21.6k p-pup array? Would prolly try the cap-resistor type setup in series first.
I have treble bleeds on a few of my passive basses (all of them 80s Peavey--as it was a stock feature) and never bother to remove them as they work well. These are just a .001uF cap, just as used on many a guitar. It is a fairly aggressive treble bleed, the more the volume goes down, the brighter it gets. Not really an issue, as my volume is almost always on 10, sometimes rolled back to 8-9 and then all the way off when not playing.

To make it a little more subtle, I have installed a .0022-.0033uF cap with a parallel resistor on many of my guitars with great results. I have also had great luck with just using those cap values without the resistor. The resistor value plays off the pot value-it's usually half the value of the pot. If there is a 250K ohm pot, I use a 120K resistor, if a 500K pot, I try a 220 or 240K resistor. If a parallel resistor is used in the treble bleed circuit with an audio taper pot, it does tend to smooth out the taper--it 'linearizes' it.
There are no rules and it's fully up to experimentation to find what works best for your instrument: cap or cap/resistor in series or parallel.

For higher resistance pickups, I try a 500K pot for volume and tone first. I almost always prefer a linear taper volume and audio taper tone.
 
Does running the resistor then cap in series style still somewhat linearize an Log or A pot? Or do you know? Appreciate your ideas man! The vol pot for the hot-ish p-pup array in this PJ for now is a 500k CTS Log/Audio pot. I saw that the suggested values on this one diagram i found are different for the series style setup. Thanx, pP
 

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