Marshall Valvestate 8080

[FW190]

Boost channel worked fine for 32 years then provided reduced output, I put in a new valve but to no effect, something on the PCB such as an opamp or diode may be culprit

Any ideas folks?

 

[AllenB]

Welcome to the forum, FW190 🙂

 

[FW190]

hello AllenB, thanks for the welcome, no doubt I'll find many a useful chats about all things amp-speaker, especially Marshall

 

[AllenB]

We have a forum for Instruments and Amps, and one for general Valve Amplifiers.

https://www.diyaudio.com/community/forums/instruments-and-amps.30/
https://www.diyaudio.com/community/forums/tubes-valves.5/

 

[FW190]

thanks, will look into these forums - as an aside, me 8080 is with a repair technician who sounded confident about repairing the low output from the boost channel