January 28th, 2012, 05:41 PM
Guys, I am currently wiring up my first partscaster and need some hints. I've opted for the 5-way wiring with a super-switch, a la Bill Lawrence.
After having it wired, I got no sound from my neck pickup in any switch position. There is no hum and the bridge pickup works fine. I understand that the most probable cause would be the hot signal connection from the neck pickup to the volume pot? Switch should be fine, is that correct? I understand ground is correct, as there is no hum... Thank you for your help!
January 29th, 2012, 11:30 AM
I just did this and had the same problem. Turns out the pickup cover was grounded to the black wire (Seymour Duncan Antiquity II's). On the bottom of the pickup is a short jumper wire from the tab on the cover to the black wire - I cut it and it worked fine. Oh - I had previously added a separate ground wire to the PU cover... I used the wiring diagram using capacitors and resistors that Phostenix has posted on TDPRI.
January 29th, 2012, 06:22 PM
Or possibly in the switch. I've never seen it with CRL or Oak Grigsby switches but I've had more than one of the old stew mac switches that needed a little adjustment.
If you look at the side of the switch, you'll see where the neck pickup's lug has a contact that the swiper connects to when in use. I've seen a few that certain tabs didn't quite reach the swiper and needed the little tab pressed down slightly so that it would contact the swiper.
January 30th, 2012, 05:17 AM
Thanks for the suggestions, guys! The Keystones have three leads, so there is no need to reground the neck cover. I guess with the switch, it would be very improbable to to have the neck not working in any of the positions that should contain the neck pickup (and this is 4 positions) due to switch malfunction. I'll just resolder all the neck PU leads joints in a spare moment. See what happens...
January 30th, 2012, 02:07 PM
Are you using Bill's with the standard five way or a super switch version?
You connected the neck pickup shield (blue wire) to ground, right?
January 31st, 2012, 02:26 AM
Super-switch it is.
February 1st, 2012, 07:10 AM
Problem solved, it was the main hot connection to the volume pot, indeed. Resoldered that one and it worked OK. Now, to solve the pickup height problems... :roll:
February 1st, 2012, 11:04 PM
Makes no sense to me. How did one of the pickups work but the other didn't if it was just the hot to the volume pot? Are any of the pickups wired directly to the volume pot? And the switch issue I was referring to wouldn't allow the neck pickup to work in any positions either as it is the only point the neck pickup contacts the switch in standard wiring. I gotta look this diagram up that you're using and see what you're dealing with. What are the different positions doing?
February 2nd, 2012, 11:08 AM
Sounds like the bridge pickup is wired to the volume pot to allow for series wiring. So, if the connection from the switch was bad, the neck pickup wasn't getting connected.
February 3rd, 2012, 08:39 AM
Here is the wiring I followed, obtained here at the TDPRI. Big thanks to the author!
February 3rd, 2012, 09:24 AM
Okay I see now, looks like your bridge pickup isn't connected directly to the volume pot but your neck pickup IS. Since your bridge pickup was working before but the neck wasn't it makes sense that the solder joint on the volume pot had an issue, but the hot lead from the switch was making its connection, it must have actually been the neck pickup lead that goes straight to the volume pot giving you the problems. Either way, you got it going and thats the important part. Glad to hear it, this is a great place isn't it?