DSL50 - V1 Tube

[termignoni]

My V1 tube is half glowing in my DSL50 and my ultra gain channel is out. Is this the issue? Should all the pre-amp tubes light up on both sides?

Thank you in advance.

 

[john rich]

If the tube is a 12AX7, yes, that's the issue, this tube is a DOUBLE triode, basically it's two tubes in one, one half usually amplifies one stage and the other half amplifies another stage, that's why your ultra gain channel doesn't work.

Just change that tube and you should be good!

 

[termignoni]

Yes it is a 12AX7. Thanks for the answer I was looking for.

 

[termignoni]

Replaced the V1 tube, channel B works again. FYI

 

[eljeffebrown]

termignoni + new tube in V1 = \m/ again!

 

[john rich]

Replaced the V1 tube, channel B works again. FYI

Good to hear your amp is screaming again!