Repairs for Golden Tube Audio SE40?

I am looking for someone to repair my Golden Tube Audio SE40
amplifier, which has intermediate "popping" and dropping out of the treble. Any info would be greatly appreciated!
There is a self-employed fellow in Northern California who is a master at restoring old tube equipment. His name is Arden Allen and he can be reached at (707) 263-5881.
Thanks much for your recommendation, will check it out!
Jeff at Soniccraft is a GOD with these units
Actually, Arden's direct line is 707-553-2361. He has done work for me and is very thorough. Excellent tech.

thought you'd like to know.
SE-40 Service manual is now available at