EINSTIEN CHANNEL 2 NOT WORKING -solved-

[Screenbuzz]

I love the sound of my Einstien channel 2 but lately it only works some of the time. Other than this the amp works perfectly after all these years. It switches properly between the two channels but I can only hear chan 2 if i crank the master and even then it is faint and clean sounding. The other channels work fine. Bad Pre amp tube? Any suggestions would be appreciated...

 

[Peter Diezel]

Please replace preamp tube V2 first. If it don´t works service (at) diezelamplification.com
Thanks, Peter.

 

[Screenbuzz]

Thanks Peter! That worked. What is the difference between the 12ax7ac5 hg+ and the hg+ 678?

 

[Peter Diezel]

No difference.It should be a non micro phonic Chinese 12AX7B.