mr frusciante
UG Member
Join date: Feb 2008
1,524 IQ
#1
hey guys

how would i tell if the valves need replacing on my amp?

and how would i tell if it was pre-amp or power amp that need changing?
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Roc8995
Moderator
Join date: Nov 2005
2,050 IQ
#2
The most reliable way is to swap them out and note the difference. After you've done this a few times with dead tubes you'll usually be able to hear them going bad without checking.