Search found 6 matches

by Brian Moffet
Wed Jul 18, 2012 1:55 pm
Forum: Electronics
Topic: Les Paul with P-90s: Can't get rid of the hum
Replies: 16
Views: 16726

Re: Les Paul with P-90s: Can't get rid of the hum

After some hand-wringing, I finally soldered the shielded wire from one pickup directly to a 1/4" jack. Plugging the pickup directly into an amp results in exactly the same objectionable hum. I get the same result from the OTHER pickup. Correct me if I'm wrong - but this would seem to confirm t...
by Brian Moffet
Sat Jul 14, 2012 3:55 pm
Forum: Electronics
Topic: Les Paul with P-90s: Can't get rid of the hum
Replies: 16
Views: 16726

Re: Les Paul with P-90s: Can't get rid of the hum

Since the photo was taken, I have brought all of the pot ground to a single point - the pot closest to the output jack. At this point, I also tied in the jack ground, and the shield grounds from the pickup switch. I also ran a new shielded cable from the output jack to the pickup switch, and tied it...
by Brian Moffet
Sat Jul 14, 2012 3:34 pm
Forum: Solid-Body and Chambered or Semi-Solid Electric Guitars and Bass Guitars
Topic: Bass Truss Rods
Replies: 12
Views: 38306

Re: Bass Truss Rods

Mark, how do you ensure that the channels in the bottom of the fingerboard line up accurately with the channels in the neck? Jig?
by Brian Moffet
Sat Jul 14, 2012 3:29 pm
Forum: Electronics
Topic: Les Paul with P-90s: Can't get rid of the hum
Replies: 16
Views: 16726

Re: Les Paul with P-90s: Can't get rid of the hum

Greg:

Both pickups show 0 ohms from pole pieces to ground at output jack.

And 3.9K from signal (tip) to pole piece (ground).

I am starting to think that this is as quiet as these pickups can get ... but that makes the guitar nearly unusable. Maybe a noise gate is the only solution?
by Brian Moffet
Sat Jul 14, 2012 3:21 pm
Forum: Electronics
Topic: Les Paul with P-90s: Can't get rid of the hum
Replies: 16
Views: 16726

Re: Les Paul with P-90s: Can't get rid of the hum

Alan: 1) Yes, it hums with various amps, in various locations. Conversely, I can plug my humbucker-equipped LP Studio into the same amp, and it is dead quiet at the same amp gain settings. 2) Turning either VOL control all the way down ELIMINATES the hum (with pickup switch in center position). 3) A...
by Brian Moffet
Fri Jul 13, 2012 11:46 am
Forum: Electronics
Topic: Les Paul with P-90s: Can't get rid of the hum
Replies: 16
Views: 16726

Les Paul with P-90s: Can't get rid of the hum

I am working on a Les Paul Special for a friend, and I've run out of ideas. The guitar has two P-90 pickups. The owner reports that it USED to be quieter, but it developed a HUM at some point. The hum is not the "usual" P-90 hum, in my opinion (to be fair, I've never owned a guitar with P-...

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