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Schatten
Magnet Polarity Tester
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.
Refined by Les Schatten especially for guitar shops, the tester is economical, easy to use, and clips in your pocket. Coupled with a basic knowledge of vintage pickup magnet polarities (instructions are included), it can also be a quick way to determine a pickup's authenticity.
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Schatten Magnet Polarity Tester
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i-5127 Updated 08/03
Jim Rolph, of J.M. Rolph Pickups in Highland Heights, Kentucky, specializes in building and rewinding pickups. Jim introduced us to the benefits of a magnet polarity tester.
“This is the most frequently used tool in my shop, and it’s something that repairmen, dealers, collectors, players—anyone who deals with pickups—needs.”
“Once a pickup leaves the original owner’s hands, and it’s not marked, how else are you going to know the magnet polarity? How many times have you wired a pickup and found that it’s magnetically out of phase, even though the white and black leads looked right? You end up with the same thin, low-powered, tinny sound as a pickup that’s wired out of phase. The tester eliminates that problem. I don’t see how a shop working on electric guitars could operate without a tool like this. There’s no money in doing a job the second time!”
“When you’re at a show looking to buy a guitar, knowing the polarity of the pickups can mean the difference between buying an untouched piece or one which looks right, but has had a pickup or two replaced. For your records, here’s are the usual magnet polarities on some of the most common vintage pickups”:
• Tele bridge pickups remained south up from the start, and the neck pickups were north up. Later, probably in the mid 50s, the neck became south up.
• 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.’
• The Jazzmaster came along in ‘57 with a north and a south to make them hum-cancelling in the middle position (as did the Jaguar, Mustang, and Jazz Bass-paralleling Gibson’s new humbucking pickup, which debuted with the Les Paul that same year).
• The P-Bass has one part of the pickup north and one part south, also making it hum-cancelling. Early P-Basses with the Tele-style headstock had a Strat-shaped single coil pickup.
• Gibson P-90s are always south up, and their PAF humbuckers were south up on the screw side, and north up on the slug side (hidden under the covers). The later patent number humbuckers remained the same.
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Shown on page 44 of our latest catalog.
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Details
Pictures
Instructions
