Hi,
I own Mark III, blue stripe, 1992 year, and the problem is that when turned on, volume suddenly gets at least half lower, an strange crunchy sound is coming out of it. This hapens on all channels (most obvious is on clean). After few minutes i hear a quiet click and everything is normal again. I don't have possibillitie to take it to Mesa service, i had it at my local service for five times yet, they changed everything possible, from tubes, condensers, tube sockets, optocoupler and so on and on, but nothing helped. Any ideas, what is going on?
I own Mark III, blue stripe, 1992 year, and the problem is that when turned on, volume suddenly gets at least half lower, an strange crunchy sound is coming out of it. This hapens on all channels (most obvious is on clean). After few minutes i hear a quiet click and everything is normal again. I don't have possibillitie to take it to Mesa service, i had it at my local service for five times yet, they changed everything possible, from tubes, condensers, tube sockets, optocoupler and so on and on, but nothing helped. Any ideas, what is going on?