diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Tubes / Valves (http://www.diyaudio.com/forums/tubes-valves/)
-   -   Biasing Marshall 9200 (http://www.diyaudio.com/forums/tubes-valves/208344-biasing-marshall-9200-a.html)

blackarab 7th March 2012 05:13 PM

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.

firechief 7th March 2012 05:54 PM

Ok so see here a short thread where a knowledgable onwer gives the specific numbers for bias current http://www.diyaudio.com/forums/instr...ll-9200-a.html
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?

blackarab 10th March 2012 04:29 AM

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.


All times are GMT. The time now is 07:29 PM.


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