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Post subject: P/J questions
Posted: Sun Apr 12, 2009 9:04 am
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I had my 08 American standard made into a P/J. I had the tek put in a Fralin linear humbucker for the jazz pickup and it's in the 60's jazz bass position.
When I have both pickup on full it's seems to be not quite as loud as when I have just the P soloed or if the jazz pickup is backed off a bit. It's not a big issue but someone told me to take the jazz pickup out and rotate it 180 degrees and that won't happen. Anyone familiar with this.
Also what's the best value for the tone pot 500k or 250k? The one in there now is a small one and I'm not sure of the value it is. Overall the bass sound very good I just want to make sure it's the best it can be as far as how it wired and pot values.


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Post subject: Re: P/J questions
Posted: Sun Apr 12, 2009 5:56 pm
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sirbassalot50 wrote:
I had my 08 American standard made into a P/J. I had the tek put in a Fralin linear humbucker for the jazz pickup and it's in the 60's jazz bass position.
When I have both pickup on full it's seems to be not quite as loud as when I have just the P soloed or if the jazz pickup is backed off a bit. It's not a big issue but someone told me to take the jazz pickup out and rotate it 180 degrees and that won't happen. Anyone familiar with this.
Also what's the best value for the tone pot 500k or 250k? The one in there now is a small one and I'm not sure of the value it is. Overall the bass sound very good I just want to make sure it's the best it can be as far as how it wired and pot values.


Usually I would suggest replacing both the P and the J, with a balanced P/J set designed so that the pickups compliment each other. Most custom makers and Seymour Duncan offer matched P/J sets.

If you don't buy a balanced set you would have to be very lucky to put a random P with a random J and get a good balance.

However, in your case you can't really call this a P/J because you are pairing a humbucker with the split coil instead of a traditional J-bass single coil.

250K pots are specified on almost every passive P and J-bass.

500k pots actually roll off some lows, which makes them practical on bass heavy humbuckers.

Mixing a humbucker with a split-coil 2nd Generation P-bass pickup is causing one or the other to load down the circuit. I'm not sure which is causing the loading issue. All dual pickup configurations will cause some loading however severe mismatching will make the loading issue worse.

Since you are using Fralin pickups I'd contact him and ask him what he recommends you do. He might know exactly what to do, or already have a diagram to address it.

He may want you to send your pickups to him so he can balance them. He's very big on customer satisfaction.


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Posted: Mon Apr 13, 2009 6:05 am
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To be more accurate the pickup I had but in a Fralin split coil side by side that fits under a stock jazz cover, it's also over wound +5%. I called it a humbucker just assuming it was because it's a split coil. I thought being a split coil it would be similar in design to my P pickup and the over wind would help it balance more with the P. I'm happy with it and can live with the slight volume increase with the P pickup soloed but still curious about why rotating the jazz pickup 180 degrees would effect anything. Also I notice the tone pot he put in is smaller than the stock volume pots, does that matter?


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Posted: Mon Apr 13, 2009 11:06 am
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sirbassalot50 wrote:
To be more accurate the pickup I had but in a Fralin split coil side by side that fits under a stock jazz cover, it's also over wound +5%. I called it a humbucker just assuming it was because it's a split coil. I thought being a split coil it would be similar in design to my P pickup and the over wind would help it balance more with the P.


If you really want to get it the best it can be, then send both pickups to Mr. Fralin for balancing.

sirbassalot50 wrote:
I'm happy with it and can live with the slight volume increase with the P pickup soloed but still curious about why rotating the jazz pickup 180 degrees would effect anything.


I really don't think that would matter much at all on a passive split coil pickup. It does matter sometimes on active pickups like blade pickups. But since the split coils are split left and right instead of top and bottom I don't see that it would make any difference. You could try it though. It wouldn't hurt anything and so long as you can solder the connections yourself it would be free. I know on guitars this is sometimes done. Whether or not it matters much I don't know.

sirbassalot50 wrote:
Also I notice the tone pot he put in is smaller than the stock volume pots, does that matter?


Not really so long as the value is correct. All the pots should be 250K.


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Posted: Mon Apr 13, 2009 1:56 pm
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hey bro Dave you've been great man, thanks for the help.

tony


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