In Reply to: RE: Help, my AtmaSphere M60 blew a fuse!! posted by Jack Williams on December 24, 2011 at 13:21:54:
Jack, Is that a fuse for the output stage B+, aka the low voltage supply(ies)? In that case there should be two fuses, one for each of the two output supplies. (I don't have either a manual OR an amplifier to look at.) I have had output tube arc-ing, but it never took out a major fuse like that, I think because the arc-ing is a transient event so the overload should not persist long enough to take our a slo-blo fuse. The tube should take itself out, in the case of the 6AS7 via its internal fuse wire. Even with 6C33Cs, which can also arc and which are each externally fused, the worst that ever happened was to take out that external single fuse for the single tube that arc'd. As you know, this does not affect the ability to use the amplifier or to get sound out of it. It's a puzzlement what happened here. But I have to say I would err on the side of caution.
It's Christmas eve, so best wishes to all.
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Follow Ups
- RE: Help, my AtmaSphere M60 blew a fuse!! - Lew 15:37:37 12/24/11 (0)