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View Full Version : Need help rewiring a Duncan STK-T2b Hot Stack Lead pup


infiniteposse
04-25-2008, 08:38 PM
Hi all-

I recently got a parts tele and it came with a Duncan STK-T2b Hot Stack Lead pickup. I wasn't sure how to get the thing wired up so a friend took a crack at it. I got it back this evening and it seems a couple of the leads have been pulled off of the pickup and need to be resoldered.

The good news is, I took up soldering this week and seem to be pretty decent at it. The bad news is, I'm not sure what order the wires should reattach to the pickup. When I got the pickup back, and I'm pretty sure when I got it, the leads, looking from the top of the pup down, went, L-R, White - Red or green - red or green and then black on the far right. The ground was coming off of the white wire on the far left.

My confusion arises from a few things. The white and black wires listed above were still wired to the pickup when I got it back, so I know they were in that order. What's odd is this differs from the pic I see on the Duncan site here: http://www.seymourduncan.com/products/electric/telecaster/cutting-edge/hot_lead_stack/

http://www.seymourduncan.com/images/products/electric/telecaster/STK-T2.jpg

This parts tele was very hacked together, so the idea that someone re-soldered something isn't shocking, but I just want to get this right before I reassemble the guitar. This is also an older guitar and likely pickup and the pup above does different slightly from mine, so perhaps they started to wire them differently?

I also have a multimeter here, so if I need to test something just let me know how to do it. I'm new to that as well. If I take a reading off the pup right now, I get 8.83 if I put the leads on the far right and left terminals of the up or the terminals that are red and green in the modern Duncan pic.

Here's some shots of the pickup as it is now:

http://gallery.mac.com/infiniteposse/100205/IMG_4066/web.jpg

http://gallery.mac.com/infiniteposse/100205/IMG_4068/web.jpg

GtrDr
04-25-2008, 09:10 PM
Is the cable completely dissconnected at the pickup? Reconnecting is a bit tricky.
If the cable is attached, here's how to wire it: Green & Bare are twisted together & grounded on the back of the volume pot. Black goes to Hot. White & Red are soldered together & taped back. On seymours website are some schematics for coil tap, Phase or series parralel applications. Feel Free to e-mail me with any other questions.

infiniteposse
04-25-2008, 09:24 PM
They are indeed disconnected from the pickup, so I need to find out what goes where on the pickup. Any thoughts on that is greatly appreciated.

Thanks!

infiniteposse
04-25-2008, 11:35 PM
Well, I jumped in and gave it a shot and I think it worked to some degree. The pickup works, but sounds the same as before... Sort of thin and anemic and lacking low-end.

What's strange is I measured the pup all the way through the process and it's measuring 8.64 in the control cavity, just like it did at the pup itself. The humbucker in the neck is an older Gibson Tim-bucker and it measures @ 7.38 and its easily double the volume of the Duncan and full range buckery goodness.

Is there anything I should look for in the cavity? Black is hot. I grounded green and the exposed wire to the volume pot. I soldered red and white together and electrical taped them to keep anything from being exposed.

Any thoughts appreciated!
-------
Post re-soldering:

http://gallery.mac.com/infiniteposse/100212/IMG_4078/web.jpg

infiniteposse
04-26-2008, 10:04 AM
Bump for any other thoughts fresh from a nights sleep...

GtrDr
04-26-2008, 11:23 AM
You did a good job. You have a lead crossed up. It's out of phase with itself wich gives you a weaker, tinny tone. I would leave it alone at the pickup & try a different wire for the hot, & connect the remaing 2 wires & tape back. You have a 1 in 3 shot.

infiniteposse
04-26-2008, 11:55 AM
Thanks Doc. I'll give it a shot.

infiniteposse
04-26-2008, 12:17 PM
OK. I think I've tried every other permutation possible:

White as hot, red as hot, green as hot with the other pairs either grounded or grouped (I used alligator clips to save time).

Neither white, red or green produced any sound when hot.

With black as hot as then using any of the other 3 for ground I got ground, with any of them, but the sound didn't change.

The only other thing that comes to mind is maybe the bare wire on the pup went to the wrong place and has the whole thing ground out in some strange way that's messing things up? I have no idea if that makes any sense, but it's the only variable I haven't messed with...

I think I may give up the ghost and just buy a pickup and replace the pots while I'm at it. There's a small solder sculpture developing on these things. I'm also happy to announce I'm capable of doing very clean wiring, so I think I can make things look much nicer quite quickly.

Thanks again for your help.