Bare Knuckle Pickups Forum

Forum Ringside => Tech => Topic started by: ctek on January 23, 2013, 12:46:50 PM

Title: Volume pot working in reverse - swapping lugs doesnt fix it
Post by: ctek on January 23, 2013, 12:46:50 PM
Hi

I have just  rewired my les paul with BKP Mules and decided to replace the pots. I followed the standard Les Paul wiring scheme from here but the neck volume control works in reverse.

I googled this problem and followed the suggestion to swap lugs 1 & 3 - which I have do but it hasn't made any difference. I am really struggling to understand what is going on here and would could be the issue. I thought swapping the lugs was bound to fix it - have I missed something obvious.

The bridge pickup is wired the same and works fine.

Any help would be much appreciated

Cheers
Title: Re: Volume pot working in reverse - swapping lugs doesnt fix it
Post by: FELINEGUITARS on January 23, 2013, 12:52:08 PM
So is one lug soldered to the back of the pot , and is the casing of that pot in turn soldered (via wire) to the backs of the others and in turn out via the jack?

Does the sound actually disappear when the volume is turned all the way to one side?
Title: Re: Volume pot working in reverse - swapping lugs doesnt fix it
Post by: ctek on January 23, 2013, 01:15:00 PM
Many thanks for your speedy reply :-)

Yes the right hand lug (looking down on the pot) is soldered to the case and then I have a wire that goes from Neck tone -> neck volume -> bridge volume -> bridge tone -> Output (soldered to the top of each pot)

It sort of looks like this

=| solder to back of pot

=| to pickup selector

=| hot wire from pick (with cap to middle lug of tone pot)

Do you mean if I have both picks up on and turn the neck volume down? I will check

On its own it acts just like a volume pot but 10 is off.
Title: Re: Volume pot working in reverse - swapping lugs doesnt fix it
Post by: Twinfan on January 23, 2013, 02:01:44 PM
Can you post a pic of the cavity?
Title: Re: Volume pot working in reverse - swapping lugs doesnt fix it
Post by: darkbluemurder on January 23, 2013, 04:35:40 PM
This sounds like a really weird situation.

I would wire the neck pickup to the bridge pickup's volume control (and disconnect the bridge pickup temporarily) to make sure it's not the pickup that is the problem. If the volume control then works normally I would swap the neck tone pot with the neck volume pot and see if that works. If the problem persists with the pot when it's wired as a tone pot, change it - it is probably defective then.

Cheers Stephan
Title: Re: Volume pot working in reverse - swapping lugs doesnt fix it
Post by: ctek on January 23, 2013, 04:42:01 PM
by some miracle I have managed to get it going - more by accident than design though.

I took it all off and started again - which almost worked. Everything was fine except the neck volume now acted like a tone pot. I went over a couple of joints and that seems to have done the trick.

many thanks for your help and speedy responses - if I lived in London you would have anew customer now :-)

Cheers

H
Title: Re: Volume pot working in reverse - swapping lugs doesnt fix it
Post by: ctek on January 23, 2013, 04:43:53 PM
And thanks for DarkBlueMurder and TwinFan two

didnt see those replies until now

H