Tube Preamp L&R Channel different current draw - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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
Thread Tools Search this Thread
Old 21st January 2009, 12:37 AM   #1
diyAudio Member
Join Date: Feb 2007
Location: NJ
Default Tube Preamp L&R Channel different current draw

I need to determine why the left channel of my phono tube pre-amp is drawing 15 ma while the right channel is drawing 10 ma. I assume the left channel is at fault since there is also some hum on the left channel. I assume the problem is either a tube or a bad electrolytic capacitor. I guess I could swap L and R tubes to determine if the problem follows the tubes but not so easy on my pre-amp. Any suggestions on what I should look for and how to test capacitor in circuit would be greatly appreciated. The pre-amp has separated B+ supply which are at the same voltage.
  Reply With Quote


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
Current draw of Squeezebox 2 while using digital out? G Digital Line Level 4 24th February 2009 11:09 PM
current draw of a chipamp jarthel Chip Amps 2 13th July 2007 11:45 AM
Current rating and tube current draw cbutterworth Tubes / Valves 1 13th October 2006 04:42 AM
current draw on a gainclone? cowanrg Chip Amps 9 9th August 2003 06:58 AM
Opamp current draw 5th element Solid State 2 21st July 2003 12:11 AM

New To Site? Need Help?

All times are GMT. The time now is 09:03 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2