Go Back   UG Community @ Ultimate-Guitar.Com > Instruments > Gear Building & Customizing
User Name  
Password
Search:

Reply
Old 07-28-2012, 09:24 AM   #1
hessodreamy
Registered User
 
hessodreamy's Avatar
 
Join Date: Aug 2005
Uneven volume taper on my tele - have I wired something wrong?

After one of many mods my tele volume pot seems to have a very uneven taper - the first quarter turn puts the volume at about 10%.

I think it was when I changed it to 50s wiring, but I've now changed it back and there's no change. I don't think I changed the pot. The one that's there now is a 250k audio pot -and I think that's what it should be, right? I think the tone pot is the same but much of the writing is obscured.

I measured the volume pot. It's 216k at full and when turned halfway it measures 191k. That doesn't sound linear. Does it sound right for a log pot?

Over the last few days I've tried a few different wirings, but no change.

So could it be the pot? Or something else in the wiring? Diagram below (I've got texas specials and a 4 way switch at the moment, hence the extra wires. The issue I'm having pre-dates the installation of the specials).

Any suggestions?

hessodreamy is offline   Reply With Quote
Old 07-28-2012, 09:54 AM   #2
IronMaiden76
UG's Krabby Patty
 
IronMaiden76's Avatar
 
Join Date: May 2009
Location: mordor
I don't think audio taper is what you want for volume...
__________________
Call me Chris
Quote:
Originally Posted by jimihendrix6699
had a blast until the person in front of me whipped out his dick and started pissing all over the floor..

Ducks and guitars or fish and guitars. I lead a simple existence
IronMaiden76 is offline   Reply With Quote
Old 07-28-2012, 10:02 AM   #3
Robbgnarly
Registered User
 
Robbgnarly's Avatar
 
Join Date: Feb 2011
Location: NSB, FL
Quote:
Originally Posted by IronMaiden76
I don't think audio taper is what you want for volume...

No Audio is what you want for volume, and Linear is what you want for tone.

What type(brand) pot are you using?

Alpha are not bad, but Bournes and CTS are much better.
__________________
2002 PRS CE22
2013 G&L ASAT Deluxe
2009 Epiphone G-400 (SH-4)
Marshall JCM2000 DSL100
Krank 1980 Jr 20watt
Krank Rev 4x12 (eminence V12)
GFS Greenie/Digitech Bad Monkey
Morley Bad Horsie 2
MXR Smart Gate

Last edited by Robbgnarly : 07-28-2012 at 10:03 AM.
Robbgnarly is offline   Reply With Quote
Old 07-28-2012, 10:10 AM   #4
seljer
UG Resident
 
seljer's Avatar
 
Join Date: Apr 2005
Location: Slovenija
Between what two lugs did you measure that resistance?
seljer is offline   Reply With Quote
Old 07-28-2012, 11:31 AM   #5
hessodreamy
Registered User
 
hessodreamy's Avatar
 
Join Date: Aug 2005
I measured the resistance across the centre and outside lugs (from the lug that normally goes to the output jack to the one that goes to the selector switch). Obviously I took the wires off first.

I can't remember what pots are. I think they are the stock pots. But I've had this for years and not had this taper issue before
hessodreamy is offline   Reply With Quote
Old 07-28-2012, 01:45 PM   #6
W4RP1G
Please, call me Pig.
 
W4RP1G's Avatar
 
Join Date: May 2010
Location: USA
Might be worth it to get better pots. I don't see what else the problem could be.
W4RP1G is offline   Reply With Quote
Old 07-29-2012, 04:46 PM   #7
hessodreamy
Registered User
 
hessodreamy's Avatar
 
Join Date: Aug 2005
Hmm. Well I've nothing to lose and have ordered some cts pots. Don't think I'll have it sorted before my studio session this week, but I shouldn't have left it so late!
hessodreamy is offline   Reply With Quote
Old 07-31-2012, 02:07 PM   #8
evhbrianmay
Has a Pet Whale
 
evhbrianmay's Avatar
 
Join Date: Dec 2009
The question he asked was if that sounded right for log.

The short answer is yes, *AUDIO TAPER IS NOT LINEAR*. Most log pots do not sound linear because you might be used to a linear pot taper, though many cheap log pots aren't an actual log taper.

http://sound.westhost.com/pots.htm
-Read the section on pot tapers.
__________________
I'm up for building you a pedal.
(Or modding nearly anything moddable)
(PM Me.)
evhbrianmay is offline   Reply With Quote
Old 11-22-2012, 08:40 AM   #9
PVO
Registered User
 
Join Date: Nov 2012
Indeed you would want to use audio taper for the volume control and this is logarithmic (because the human ear is logarithmically sensitive to audio volume). Most log/audio pots are constructed from 2 different resistance strips which mimic logarithmic behavior, however this is good enough for the human ear. Perhaps for your guitar it would be better to get a good audio taper pot, you could try a plastic film type, they are very smooth.

more on audio taper
PVO is offline   Reply With Quote
Reply


Thread Tools Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump



All times are GMT -4. The time now is 07:37 AM.

Forum Archives / About / Terms of Use / Advertise / Contact / Ultimate-Guitar.Com © 2014
Powered by: vBulletin Version 3.0.9
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.