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Discussion in 'Pickups & Electronics [BG]' started by MistaMarko, Feb 27, 2008.
I just notice that the pickups hum if the both aren't both turned all the way up
because they only hum-cancel when they are both outputting at the same level. lots of read on this physics subject everywhere
They don't have to be "all the way up"; they just have to be at the same volume to eliminate hum.
They are reverse wound, so when they are both turned up they basically act as a humbucker.
They don't have to be "turned up"; they just have to be at the same volume.
Fair enough. But you do agree that the coil winding direction is the point, right?
yeah. they are in anti phase perhaps and the poles are also opposite
so one creates "hum" and the other u can call "anti-hum"; when you give both the pickups the same current ie volume the "hum" and "anti-hum" canncel each other equally and hence no noise. the more the difference in the amount of current flowing through both the pickups the more is your noise
you can reduce the noise by shielding and using quality cables but can eliminate it as long as you are using single coil picups as they are susepitble to the 60cycle hum
the hum and anti hum concept is sort of an analogy i just thought off to explain whats happening in simple terms hope i was not wrong
That's half of it; one pickup is wound the opposite way from the other and its magnets are reversed as well. One pickup is standard and the other is RWRP (reverse wound and reverse polarity). This makes the signal that each picks up from the string in phase but the noise each picks up from the environment 180 degrees out of phase, hence signal reinforces but noise cancels.
Well I also have the whole problem where when I'm not touching the strings it buzzes..and when I touch a string it stops. (this isn't the pickup problem..its another buzzing problem..)
Bad bridge ground is the most likely culprit.
Well there is a copper strip going from my bridge p-up to the bridge (i guess thats how they grounded the MIJ '88 basses). when the neck pickup is turned completely OFF, this problem does not happen.
Mine does a strange thing, if both are up full and I turn one down it hums. If both are off and I turn one up, no hum. Am I the only one with this?
Probably someone else has pointed this out, but IME, if you have disrupted the bridge
ground, touching the strings has limtied effect on hum.