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FDP Forum / The 'Pup' Tent / Various North vs. South Pickup Polarity Measurements Here!

yes9310

USA

what you think is true, you're right!
Nov 22nd, 2006 10:26 AM   Edit   Profile   Print Topic   Search Topic

To help save some users from installing some bad wiring combination Fender pups and losing some new strings, I decided to post this. After reading Dazco's very informative method to determine a pickup's pole polarity whether it is "North or South" to further determine if your pickups are wired in phase or out of phase (which produces a thin tinny sound), I took his advice and according to his instructions, measured several pickups laying around that I've swapped in and out of various Strats over time. In addition, the Vintage Guitars Info site at http://www.provide.net/~cfh/pickups.html says according to Seymour Duncan (who researched Fender extensively), that all Fender pickups in the 50s had a North Magnet Polarity (MP), while everything after that date from the 60s on has a South MP. However, the chart only goes up to 1967, so there really isn't much info to my knowledge available about this anymore for pups after '67. Recently, on the forum, some have discovered that using Texas Specials, Tex Mex or maybe even other Fender pickups to sound out of phase when installed in combination with other standard Fender pickups (custom or stock). I found this to be the case for myself when installing a Tex Mex bridge pickup in bridge position, along with 2 Fender Custom 50s in neck and middle positions. Upon testing, the CS 50 was found to have a North polarity, true to vintage specs. The Tex-Mex on the other hand tested with a South polarity, like pickups from the 1960-67 era. Therefore, my pickups are indeed wired out of phase - so I'll need to reverse the 2 wires on the bridge pup. (Will this give me humbucking in position 2?) What's even more interesting is that while I was in my pup box, I tested some other pups and found that the CS 69 tested North contrary to pups from the 1960-67 era (as far as the chart goes) which had a South polarity and the bridge pup from my 2005 AmSe tested South Polarity while my Highway 1 2004 tested North like the 50s pups! See below:...

North vs. South Polarity Differences:

CS 69 5.43k North Polarity
CS 68 Left Hand 6.15k North Polarity
CS 50 5.84 North Polarity (From '56 Strat CC)
AmSe Bridge 7.61k South Polarity
Tex-Mex Neck 6.39 South Polarity
Tex-Mex Middle 6.47 North (RWRP)
Highway 1 2004 All 3 5.88 North Polarity

The CS 69s would all be similar as would CS 68, CS 50, Hwy 1 all same no RWRP middle. The AmSe middle would be North as it is RWRP. Conversely, the Tex-Mex middle being North Polarity since it is reversed to the rest. I didn't have a set of Texas Specials to test but heard some having out of phase problems with them so they are probably Neck-South, Middle-North (RWRP), Bridge-South like the Tex-Mex pickups and 2005 AmSe are.

So if you are wiring any of the above pickup combinations and find they are out of phase, try reversing the wires on the one that's causing the phase problem and that should fix the problem. Sorry I didn't have more pups to test. Maybe some other forum members can add to this list?

Hope that saves some time and trouble! Now to take off this brand new custom set of Ernie Ball strings and reverse the wires!

Determining Pup Phase before installing

leadowner

australia

Jun 30th, 2007 07:28 AM   Edit   Profile   Print Topic   Search Topic

The 57/62 is reverse engineered from a 63 Strat (why didn't they call them 63 pickups?) and is south magnetic polarity and the neck middle and bridge are all the same with no RW/RP middle.
The 57/62 pickups are counter clockwise wound from my experience.
From what I've read the Texas Specials are neck/north, middle/south, bridge/north.

Strats were always north up until 1960 when they became south up, and have remained so except for some of their newer products such as their ‘Texas Specials.’

http://www.stewmac.com/freeinfo/I-5127.html

Fender Original 57/62 Stratocaster Pickups Set.
Original '57/'62 Stratocaster Pickups Set of 3
Redesigned for a truer vintage tone. Reverse engineered from a coveted '63 vintage Strat, these pickups deliver the original vintage Strat sound. The staggered, beveled edge Alnico 5 magnets with Formvar magnet wire produce glistening highs and warm lows that are unmistakably vintage. This is the tone. OEM on American Vintage Stratocasters.

SPECS:
'57 / '62 Pickups:
DC Resistance: 5.6K
Inductance: 3.0 Henries


(This message was last edited by leadowner at 07:07 AM, Jul 4th, 2007)

FDP Forum / The 'Pup' Tent / Various North vs. South Pickup Polarity Measurements Here!




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