Magnet Polarity Tester

  • 30 Reviews
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Refined by Les Schatten especially for guitar shops, this tester is useful for troubleshooting and testing pickups and wiring.

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Magnet Polarity Tester

Item # 5127
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$10.95

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Details

Refined by Les Schatten especially for guitar shops, this tester is useful for troubleshooting and testing pickups and wiring.

Pickup rewinding specialist J.M. Rolph has noted, "How many times have you wired a pickup and found it's magnetically out of phase, with the same thin, low-powered sound as a pickup that's wired out of phase, even though the lead wires looked right?" By indicating the north or south magnetic orientation of a pickup's polepieces, this polarity tester can help you avoid the problem.

With a basic knowledge of vintage pickup magnet polarities (instructions are included), this tool is also a quick way to determine a pickup's authenticity.


Trade Secrets! Newsletter

How to open a humbucker and reverse the polarity

Erick answers a customer question about reversing a humbucker's pickups, and finds that the hardest part is getting the cover off the pickup!

Product Instructions

Schatten Magnet Polarity Tester

Jim Rolph explains the importance and use of the Schatten Magnet Polarity Tester.

Ratings & Reviews

Magnet Polarity Tester

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  • Based on 30 Reviews
Displaying 3 of 3 1 2 3
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brilliant simplicity

By Bert van der Moer from Netherlands
(Customer's Reviews) Thursday, April 07, 2011


a plastic tube containing a little rounded magnet in two colors. Simple, effective and eminently useful.

A must have

By Mike T. from North Carolina, USA
(Customer's Reviews) Thursday, March 10, 2011


I have used this on every guitar I've laid hands on since I got it. Great for pickup installations, can even help identify correct pickup polarity for vintage instruments.

Works Perfectly

By RalphL from Central Indiana
(Customer's Reviews) Wednesday, February 23, 2011


Could a magnetic compass accomplish the same thing? Yes! But this is fast, easy to read, rugged and reasonably inexpensive. Small cylindrical size its unobtrusively in my tool pouch. Just the ticket!

A Must Have

By Bill Teeley from NY, NY
(Customer's Reviews) Sunday, January 09, 2011


If you work on or wind pickups you need this tool. If you don't know why, you shouldn't be working on pickups.

Magnetic Polarity Tester

By KL from Christchurch, New Zealand
(Customer's Reviews) Thursday, December 16, 2010


Effective and small. I assume that white up and visible is north and not white down and attracted to the coil. Just a little ambiguous for me! Still, you can tell one pickup from another in an instant.

Great product!! A must have! 

By Bj+¦rn from Flanders/Belgium/Europe
(Customer's Reviews) Monday, December 13, 2010


Very nice product to determine polarity of pickups!! Very handy! Long live Stewmac!! A+++

Chris Pedersen Newcastle Australia

By tzen from newcastle australia
(Customer's Reviews) Saturday, October 30, 2010


As always, another great tool from stew-mac, makes me an expert without fuzz. Thanks TEAM STEW

Neat little tool

By Bob from USA
(Customer's Reviews) Thursday, October 07, 2010


Love this thing. I use it a lot when winding pickups to verify magnetic polarity, as well as for odd jobs like determining which coil to cut for hum canceling when combined with a single coil.

What is this pickup?

By Big Jon from Tennessee
(Customer's Reviews) Friday, August 13, 2010


You know the brand, you know the DC Ohms resistance, but do you know whether the pickup is north or south. This will tell you quickly. No more installing to find that one or more is out of phase.

Cool tool!

By Justin @ Urich Guitars from Pittsburgh, PA
(Customer's Reviews) Tuesday, July 06, 2010


A quick and easy method for finding the polarity of a pickup!

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