octavedave
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- Joined
- Mar 13, 2015
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Hi all,
Recently purchased a 2nd hand Mesa Boogie Studio 22 (with graphic EQ, but not Plus). I have done the lead master and gain mods, and am overall extremely happy with the sounds coming from this amp. Much prefer it to my old Fender Hot Rod.
However I have question about the high voltage secondary output from the main transformer. According to the schematic it should 360VAC but I am only measuring 275VAC. And this in turn reduces the expected DC voltages at points A, B and C (c53, c52, c51).
The amp still seems to work fine, but surely this cant be right. Running off 240 mains (UK). Could this be a faulty transformer (561022), or has someone deliberately reduced the secondary voltage?
Any insights would be appreciated.
Thanks
Dave
Recently purchased a 2nd hand Mesa Boogie Studio 22 (with graphic EQ, but not Plus). I have done the lead master and gain mods, and am overall extremely happy with the sounds coming from this amp. Much prefer it to my old Fender Hot Rod.
However I have question about the high voltage secondary output from the main transformer. According to the schematic it should 360VAC but I am only measuring 275VAC. And this in turn reduces the expected DC voltages at points A, B and C (c53, c52, c51).
The amp still seems to work fine, but surely this cant be right. Running off 240 mains (UK). Could this be a faulty transformer (561022), or has someone deliberately reduced the secondary voltage?
Any insights would be appreciated.
Thanks
Dave