Bias tip/problem

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evhwolfie

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Jul 16, 2006
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I just found out today that the bias changes alot after playing for a while. The other day I re biased my amp right up to about 37ma and I thought I would check it today after about a solid hour of playing it fairly loud and all of tubes read about 42ma, i was very supprised, I quickly stopped and turned them down a bit. They sounded kick *** but ive herd this can burn out tubes. Has anyone else had problems like this?
 
I've noticed that mine change slightly the hotter the amp gets but it is only like 1 or 2 ticks. Usually when I bias the amp now I just make sure to let it get good and hot. I run my 6L6's at 38.
 
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