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10-14-2008, 08:18 AM
| | Registered User | | Join Date: Feb 2008 Location: Zagreb, Croatia | | | 5-string split-J pickups - why 3+2 winding?
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Looking across all the various pickup manufacturers, I've yet to understand this:
All four-string in-line humbuckers (J-shape, but with two in-line coils) have the lower 2 string positions (that is, the four polepieces under E/A) wound with one coil, and the upper 2 with the other coil.
What I don't understand is, provided we have 10 polepieces for a five-string J-pickup, how come all of them are grouped 4+6 (or reverse), and no pickup manufacturer has yet wound one coil around the first 5, and the other around the last 5 poles?
Hope someone might shed a light on this...
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10-14-2008, 08:29 AM
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Builder: Rickett Customs | | Join Date: Jul 2007 Location: Southern Maryland | | | DO you think it might affect the A string (B,E,A,D,G)? Or the D string (if it's E,A,D,G,C)?
Maybe there's a balance issue doing it that way, splitting the pair of poles in half. Eh, all I can do is speculate. |
10-14-2008, 07:46 PM
| | Registered User | | Join Date: Sep 2008 Location: Ottawa and its Environs. | | | 2 poles per string.
If you split up that A string's poles there could be problems.
Also, if you look at string mass, the B and E are probably as massive as the E, D, and G strings combined...and put out similar voltage. |
10-14-2008, 07:53 PM
| | Registered User | | Join Date: Jan 2008 Location: Novosibirsk, Siberia, Russia | | | i can explain: coils are winded in reverse direction, so if the signals are different to each coils, but hum is similar, the hum does cancel. Also, there are a pair of poles per string, so the A string will be understanded as a hum source to pickups, and its signal will be canceled. |
10-15-2008, 12:02 AM
| | Registered User | | Join Date: Jul 2004 Location: Gladstone, QLD, Australia | | Quote:
Originally Posted by Ach  i can explain: coils are winded in reverse direction, so if the signals are different to each coils, but hum is similar, the hum does cancel. Also, there are a pair of poles per string, so the A string will be understanded as a hum source to pickups, and its signal will be canceled. | no...not really...the hum is cancelled, not the signal...
reverse wind, reverse polarity = signal in the correct direction...common mode noise is rejected, not string signal...
the reason it's not done is that you don't have NEARLY enough space between the two pole pieces to fit the end of ONE coil of wires, let alone TWO.... | | Thread Tools | Search this Thread | | | | 
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