bremen Posted April 14 Posted April 14 Gday I'm about to have this combo delivered for me to repair. Fault is an intermittent very loud 100Hz buzz. Most likely a dry joint on a reservoir cap. But just in case it's not that simple, anyone got a schematic? Cheers Quote
Dood Posted April 14 Posted April 14 Here ya go! https://el34world.com/charts/Schematics/files/Marshall/Marshall_b150.pdf 1 Quote
Dood Posted April 14 Posted April 14 Nice to see a full HT for the preamp valve, rather than starved plate types. I’m intrigued by this one, I don’t think I ever played through a Marshall Bass State before despite having used plenty of the guitar Valvestate gear in my six stringin’ years. I still want a DBS 7400… Quote
bremen Posted April 15 Author Posted April 15 Thanks, el Dooderino! I played in a band with a guitarist used a Valve State, I did enjoy its crunchy goodness. 1 Quote
bremen Posted April 15 Author Posted April 15 13 hours ago, Dood said: Nice to see a full HT for the preamp valve, rather than starved plate types. I’m intrigued by this one, I don’t think I ever played through a Marshall Bass State before despite having used plenty of the guitar Valvestate gear in my six stringin’ years. I still want a DBS 7400… I love the "free B+". I did that for my Fenderpeg-Elliott. A dry joint or dried up cap in there would be another candidate for the cause of the BZZZZZZZ Quote
bremen Posted April 19 Author Posted April 19 Deep joy: I've fixed it, owner is delighted and I have a schematic to steal ideas from:-) 10⁶ thanks, @Dood Quote
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