What damage occurs if EL34/6L6 switch not set correctly?

[sdhnc123]

On my VH4S, I burned up the Hum Potentiometer way back in September by not selecting "6L6" on the EL34/6L6 switch when changing tubes from EL34 to 6L6. I replaced the Hum Potentiometer with the part recommended by Peter. The VH4S has been working perfectly and sounding great since that time.

I might be selling the VH4S soon in order to take care of other expenses. If I sell the amp, I want it to be in good condition for the next owner.

The Standby switch was turned to "RUN" for about one second before I noticed smoke and switched it off. Is it possible that anything else on the other side of the PCB board was damaged when I forgot to make the correct selection on the EL34/6L6 switch? Should anything be checked out before I sell the amp?

Thanks.

 

[GtarLover]

I hate to admit that I did the same thing with my VH4S

I was not willing to deal with it because I wasn't sure what might be wrong either, so I sent it to Peter to go over. Of course, it came back working better than it did before, so I am happy

This is probably a question for Peter, or someone with more specific familiarity with the VH4S circuits specifically. Good Luck!!

 

[Peter Diezel]

No big deal, when the bias pot in the inside
is set right.

 

[sdhnc123]

Thanks Peter.
But is it possible that anything other than the Hum-Trim-Potentiometer would have been damaged after the VH4 had been running for only one second with the bias switch (EL34/6L6) set to EL34 when there are 6L6 tubes in the VH4?

 

[Peter Diezel]

Just a bad tube can destroy the hum trimmer on the VH4