OK, so I finally decided to dig into my Epiphone PBass clone to see if I could at least cut down on the hum, and also find out why my tone pot was also affecting the volume. I downloaded the "Standard P-Bass" schematic from the Seymour Duncan website. May I add that I am NOT any kind of electrician, nor do I play one on TV? I would greatly appreciate the accumulated wisdom of this forum. I am assuming - dangerous, I know - that the SD schematic is "looking" at the pots from the bottom to illustrate the soldering points on the pots. Please bear with me. Here's what I found: 1. The volume pot is labeled "B500K (the symbol for) ohms"; the tone is labeled "A500k (the symbol for) ohms". (Obviously, NOT 250k.) 2. The cap is labeled "2A683J". 3. Looking at the SD schematic, the white wire from the pup should be attached to the left "point" of the volume pot, which should then jump to the tone pot. Mine is on the center, *no connection to the tone pot*. The center point also has no jumper to the tip of the output jack. 4. The black wire from the pup should be soldered to the body of the volume pot, common w/the grd from the bridge, the jumper to the tone pot, and the right point. My black wire is soldered to the body of the pot, common with the left point (again, no jumper to the "point" on the tone pot from here), and the jumper to the body of the tone pot, no jumper to the bridge. The right point has a short jumper soldered to the body of the pot. 5. The jumper from the common solder point on the body of the volume pot to the body of the tone pot should share a leg on the cap, which then goes to the center point of the pot, and a jumper to the sleeve of the output jack. Mine goes to the body of the pot, shares a leg on the cap, which then goes to the center point of the pot, and also jumps to the left point of the pot. The jumper to the sleeve is there. The right point of the pot is open. 6. The jumper from the bridge is connected to the sleeve of the output jack. It is the closest point from the bridge, and does make the ground. What, if any, advantage would there be to moving it to the body of the volume pot? Most curiously, there is also a jumper from the sleeve connection to the tip connection. That I REALLY don't understand. There is no other connection to the tip. There is a metal-looking tape thing on the underside of the pickguard where the controls come through. There is no shielding in the cavity, only a black paint of some sort. This is my first foray into the innards of this, or any, bass. I like the way it plays, and I can't afford a new bass right now. Should I change out the pots and/or the cap/attempt to rewire it correctly? I plan on getting some copper tape to line the cavity. TIA! This forum has been a wonderful resource for me, and I look forward to your suggestions.