Biasing Marshall 9200 - diyAudio
Go Back   Home > Forums > Live Sound > Instruments and Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 7th March 2012, 05:13 PM   #1
diyAudio Member
Join Date: Dec 2011
Default Biasing Marshall 9200

help needed to bias amp using 5881/6l6 tubes ,need to know what proceedure to bias for new tubes ,many thanks Blackarab.
  Reply With Quote
Old 7th March 2012, 05:54 PM   #2
diyAudio Member
firechief's Avatar
Join Date: Sep 2008
Location: Near Seattle Wa
Ok so see here a short thread where a knowledgable onwer gives the specific numbers for bias current marshall 9200
I asume that there are resistors in the cathodes of the output tubes, if so measure the voltage drop accross the resistors at idle and adjust?
"You can keep your insurance baby nothing is guaranteed" -Tom Petty
  Reply With Quote
Old 10th March 2012, 04:29 AM   #3
diyAudio Member
Join Date: Dec 2011
Default biasing marshall 9200

thanks for your answer , i am getting 494v plate voltage and cathode current is -50v , how should i go about finding the correct current for the new tubes ,thanks for your help.
  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
marshall 9200 blackarab Instruments and Amps 5 8th December 2011 11:44 PM
DEQ 9200 schematic rolexcomm Car Audio 15 13th July 2011 12:51 AM
Marshall Amp Biasing TubeManiac Instruments and Amps 9 26th April 2011 12:46 PM
low-biasing or high biasing in Class-AB amps Workhorse Solid State 124 18th October 2005 04:45 AM

New To Site? Need Help?

All times are GMT. The time now is 10:03 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