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Old June 4th, 2012, 05:27 AM   #1 (permalink)
hoehlentroll
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Join Date: Mar 2007
Location: Mannheim, Germany
Posts: 1,771
amptech question: tubing a fireball - please help

I read that the "grading" systems makes retubing a piece of cake. I opened the amp and found this:





I bought the amp new in local store and the tubes where stock. the tubes are about 5 years old *i know, I know*

1. what does the different tubing do to the sound?
2. could this by any means be NO fault?
3. what should I do now? a. buying grade 22 or 27 or b. take the amp to a tech which means LOADS of money. I live near Tube Amp Doctor (TAD-tubes).

I have no fucking idea of how to bias a tube amp!

EDIT: funny thing: http://www.urbandictionary.com/define.php?term=tubing
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Last edited by hoehlentroll : June 4th, 2012 at 05:39 AM.
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