CRAP! I forgot to flip the bias switch!

[aly44]

I forgot to flip the switch when I put in the EL34s. I was playing at barely bedroom volume, for about 20 minutes. What are the chances I messed my amp up? I am very, very scared. Everything sounds fine...

 

[plapnab]

None I think...but you may have took some life off you tubes.

 

[mikey383]

Nothing. You ran your tubes cold, that's all.


Carry on.

 

[fluff191]

Nothing. You ran your tubes cold, that's all.


Carry on.

+1

 

[94Tremoverb]

You did no harm whatever - it's actually surprising it even sounded any good, the tubes were biased so cold they were almost off!

It's the other way round (6L6s with the bias switch to EL34) which is risky, and even then really only in the Bold modes, especially Silicon Diode Rectifier, at higher volumes.