![]() In the former it makes it much less and in the latter it makes it more. In either case these changes greatly mess with the normal inductance of the pickup. Another version known as "stacked coil" uses two coils stacked one on top of the other where one coil picks up strings and the other only picks up hum. Usually this is by winding two coils side by side so that sort of like a P bass one coil pick up two strings and the other half picks up the there two. Note that to have humbucking with a Jazz type pickup you need to split the pickup into two coils somehow. The way you test for single coil hum is that while touching ground won't change hum, by moving the bass around into different orientations (some of them unplayable) you can find an orientation where the hum is "nulled" and is reduced. When you solo either of them you have single coil and hum sets in. Thus when both pickups are on full (or at equal levels) they form a humbucking system. To make the signals from the strings back in phase, the magnets on one pickup are reversed. Usually this means two pickups one wound one way and the other wound opposite to cancel hum pickup. Humbucking is the only way to get rid of it. This hum DOES NOT change when you touch ground. The other Hum is magnetic hum which comes from single coil pickups. Note that while Fender basses are typically shielded (with conductive paint) sometimes their shielding leaves much to be desired. Once this is working right touching ground will have NO effect on hum (and related higher frequency 60 Hz harmonics noise) Copper foil works best but is more work to do. You want to enclose ALL electronics (except tops of pickups, of course) in a continuous grounded conductive box. This is the kind of hum that can be nearly eliminated by proper shielding of the bass. ![]() This is the hum that goes away when you touch ground (strings are grounded through the bridge). Electric hum comes from noise being capacitively coupled to your body and into the bass. But I also love single coil tone! It's the way life works. So, I'm wondering, should I just get the damn bass shielded first and see what that does?Ĭlick to expand.Usually I'm with you. As many of you know, this is a tough task because there's no such thing. Why do my ears think that they're related to one another? I was on this mad hunt for hunt for hum canceling pups that sound just like single coils. I was playing through a GK 2001RB (not my amp) And similarly, I swear I couldn't even hear a 60 cycle hum at all. And contrarily, last night I played somewhere and had no extra noise whatsoever when I wasn't touching my strings. When I play somewhere with really bad grounding hum (the high frequency one that you can stop by touching metal), my 60 cycle hum seems to also get much much louder. But my ears seem to think they're related I understand that 60 cycle hum is different than the high pitched one that you can stop by placing your hand on your strings. To start with, the bass being used: 2012 USA Fender Jazz Bass w/ CS60s pups
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