More Tube Amp Problems, pls help :(

I_M_Ken

New member
Hey guys,

last week i posted here about where should my 12Au7s go. (Crate Blue Voodoo 60 combo amp)
That one is solved. Mailed the guys at Crate/Loud and they got back to me after awhile.

Now i got another problem. The new tubes are in
2 x 6L6, 4 x 12AX7, 1 x 12AU7

Yesterday, the amp worked for about 10 secs. Then it seems that output was cut by about 50% (volume was a 8, but sounds like it was at 2)
Today, the amp started squealing.... and the tubes behind got really really hot within 5 min.

Anyone know whats wrong? or i should just dump this amp and go for another?
Previously before i changed tubes, it was fine...

i was using 5881s instead of 6L6s for the power tubes.


Thanks.
Ken
 
Last edited:
Re: More Tube Amp Problems, pls help :(

i'm thinking your amp was not biased for 5881's, but i'm no expert
 
Re: More Tube Amp Problems, pls help :(

i'm thinking your amp was not biased for 5881's, but i'm no expert

hmm, well its an auto-biasing amp.
so im not sure if you're right or not.
anyway i put the old power tubes back but still the same problem
 
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