Metropoulos Forum

Hey everyone, I have been having an issue with my EVH 5150 III 100 watt head. 2nd channel is dead, 1st and 3rd work fine.

I tried replacing the pre-amp tubes but that didn't help. I haven't touched the Power Tubes yet. Not sure how they work...are the dedicated to a specific channel, if so...which one of the 4 could be the problem.

This is my first tube amp, so troubleshooting tube issues is new to me. Trying to avoid replacing all 4 just to see if thats the problem. Any advice would be greatly appreciated. Thanks!

I doubt the power tubes could be the problem.
Try to contact Mr Kaplan, he's the father of the amp and he's a very cool and helpful guy.

Howard Kaplan

Senior Project Engineer – EVH R&D Engineering
Fender Musical Instruments Corp.
17600 N. Perimeter Drive, Suite 100
Scottsdale, AZ 85255

EVH® Brand Guitars, Amplifiers and Musical Products
Attn: Consumer Relations Dept.
17600 N. Perimeter Drive, Suite 100
Scottsdale, AZ 85255
Telephone: 1 (800) 856-9801
Email: consumerrelations@evhgear.com

Awesome, thanks for the tip!