Hi. I was browsing today and came across your post relating to your Tube Amp. I don't know how far you have got with this but I have some information that you may find interesting. The Mesia amp that you own (nice cab by the way, ext cabs are rare!) is an early 80's Japanese amp -'inspired' by Boogie obviously but made in Japan. The company was only alive for a short time before falling foul of the litigation acts executed by various US manufacturers (Gibson, Fender etc.) against some extremely successful Japanese makers who were producing very accurate copies of name US equipment. Some of these makers went on to produce great guitars for themselves (Ibanez, etc), some (like Zoom) quit in advance of being sued. The MT60 and MT100 amps have a serious design fault; If you change the tubes to anything else than an exact match, the output transformer will blow. This happened to my Zoom amp and also to many amps owned by other Zoom enthusisasts. I know because I used to host a Zoom web page and I regularly recieved communicaitions from people just like you who have broken Zoom amps and are looking for a repairer. I'm currently in conversation with an amp repairer in Felixstowe who says he has repaired an MT60 last year. If you like I'll let you know how I get on.
Hi. I was browsing today and came across your post relating to your Tube Amp. I don't know how far you have got with this but I have some information that you may find interesting. The Mesia amp that you own (nice cab by the way, ext cabs are rare!) is an early 80's Japanese amp -'inspired' by Boogie obviously but made in Japan. The company was only alive for a short time before falling foul of the litigation acts executed by various US manufacturers (Gibson, Fender etc.) against some extremely successful Japanese makers who were producing very accurate copies of name US equipment. Some of these makers went on to produce great guitars for themselves (Ibanez, etc), some (like Zoom) quit in advance of being sued. The MT60 and MT100 amps have a serious design fault; If you change the tubes to anything else than an exact match, the output transformer will blow. This happened to my Zoom amp and also to many amps owned by other Zoom enthusisasts. I know because I used to host a Zoom web page and I regularly recieved communicaitions from people just like you who have broken Zoom amps and are looking for a repairer. I'm currently in conversation with an amp repairer in Felixstowe who says he has repaired an MT60 last year. If you like I'll let you know how I get on.