volume pot in balanced line - diyAudio
Go Back   Home > Forums > Live Sound > Instruments and Amps

Instruments and Amps Everything that makes music, Especially including instrument amps.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 16th October 2008, 02:21 PM   #1
diyAudio Member
 
Join Date: Oct 2008
Default volume pot in balanced line

Hello all,

is it possible to connect a volume potmeter in a balanced line? My guitar is equipped with a low impedance p.u. and is connected to an audio mixer (XLR, low Z, hot, return and shield). My goal is to use a volume foot pedal with this guitar but all the pedals I know of are high Z unbalanced. Maybe someone can help me out on this one? Thanks a lot, Bouatila!
  Reply With Quote
Old 2nd November 2008, 05:59 PM   #2
diyAudio Member
 
Join Date: Aug 2008
You can use a stereo pot. They can be scavenged from old amplifiers but can also be found at Digikey I would believe.

Best Regards
Tom
  Reply With Quote
Old 2nd November 2008, 06:25 PM   #3
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
just insert the pot (connected as a variable resistor) between hot and cold. No connection to signal ground.

If the line resistor in the hot and in the cold is too low then the impedance seen by the source will fall drastically as the attenuation is increased.
Depending on the impedances of the source and of the receiver, you will have to determine the line resistors and pot value to get the attenuation rates you require.
__________________
regards Andrew T.
  Reply With Quote
Old 5th November 2008, 05:54 PM   #4
diyAudio Member
 
Join Date: Oct 2008
Quote:
Originally posted by MisterStarshine
You can use a stereo pot. They can be scavenged from old amplifiers but can also be found at Digikey I would believe. Best Regards Tom
... and that's what I did and it works like a charm! Thank you for sharing this splendid idea. I used a 10k log stereo pot and first made a testing configuration. Now that it works I plan to convert an Ernie Ball volumepedal. E.B. have a stereo low impedance pedal, but their 25k is way too much.

Ciao, Bouatila
  Reply With Quote
Old 5th November 2008, 05:54 PM   #5
diyAudio Member
 
Join Date: Oct 2008
<just insert the pot (connected as a variable resistor) between hot and cold. No connection to signal ground.
If the line resistor in the hot and in the cold is too low then the impedance seen by the source will fall drastically as the attenuation is increased.
Depending on the impedances of the source and of the receiver, you will have to determine the line resistors and pot value to get the attenuation rates you require. regards Andrew T.>


Thank you for thinking along with me. I went for the stereo pot option: it works splendidly. Ciao, Bouatila
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Relay volume &amp; balanced con ciccio73 Pass Labs 0 29th September 2008 10:05 PM
Balanced Zen v5 + balanced Zen line stage Adrie Pass Labs 0 30th May 2004 05:27 PM
Balanced volume control? MWP Chip Amps 2 1st November 2003 05:36 AM
Zen Balanced Line Stage Balanced vs Unbalanced macka Pass Labs 28 11th December 2002 06:18 AM
balanced volume control diy student Solid State 2 16th January 2002 12:23 AM


New To Site? Need Help?

All times are GMT. The time now is 07:17 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2