|June 4th, 2012, 05:27 AM||#1 (permalink)|
Join Date: Mar 2007
Location: Mannheim, Germany
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.
|June 4th, 2012, 09:18 AM||#2 (permalink)|
Den Mørke Natt
Join Date: Oct 2008
Location: Sacramento, CA
The grading number is simply the amount of idle current that the tube will conduct when the tube is placed in a typical amp. Higher numbers means that the tube will run a little warmer. You should pick up a matched set, meaning that they are the same or one number off, just buy a set of matched tubes, put em in and be done with it.
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