Help solve hum problem on pbass

SirPoonga · #1 02-12-2005, 02:34 PM

http://www.mrgearhead.com/faq/diagra...20031-0400.pdf

Ok, I took my pbass apart to look at the wiring. It doesn't appear to be wired like the pdf file. I am thinking that might be why it is humming.

It appears the volume pot is wired correctly except the capacitor is going from lug 3 of the volume pot to lug 1 of the tone. According tot he pdf it should go straight to lug 1 and the capcitor should go from lug 2 to ground. Other than that i believe it is wired correctly. Would that cause the hum?

Background on the hum. The hum would go away when I touch anything metal on bass suggesting a grounding problem. Well, if the wiring is wrong that would be a good reason too.

Edit: here's a pic of my wiring if you can see it.
http://img.photobucket.com/albums/v4...ass_wiring.jpg

SirPoonga · #2 02-12-2005, 08:20 PM

SWEEEEEEET!
I decided to change the wiring to what I thought was correct according to the pdf. The tone knob actually does something now.
It use to do something but not much so I thought it was a worthless knob. And there is no more hum. And now that I have flatwounds on and more tone control I can get some deep bass. I like it very much

SirPoonga · #3 02-12-2005, 09:43 PM

Actualy, I have a very faint hum now. So I still have to track it down. It is better though.

Perfect-Tommy · #4 02-12-2005, 10:14 PM

I'm far from an expert on this subject. shielding? an electrical minded type want to tackle it?

SirPoonga · #5 02-12-2005, 10:23 PM

The bass doesn't have any shielding, that is true.