hey all, quick question. looking to replace a hughes and kettner triamp mk1 output transformer with stock or upgrade (believe the existing one is blown - power up with no sound from an channel, all tubes lit). old manual lists it as a UA100101 or maybe E 958 057. searches inconclusive. any ideas??

Lots of other issues can cause no output. I would be damn sure that the OT is bad before replacement. It can be tested. You should also troubleshoot the circuit. Just because the tubes light up and you have no output does not necessarily mean that the OT is bad.

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Stage Guitars: '80s Thin line LP Custom, '70 LP Standard, '83 Squier Black Headstock Strat w/ Dan Torres pickups, '59 Black Danelectro DC, sometimes others.

Pedal Board: Nady UHF 10 -> TU2 -> Rocktron Big Crush -> 70s MXR Phase 100 -> Cry Baby -> Bad Monkey -> Early '80s Rat -> Early '80s Ibanez CS 9 -> Ibanez DE 7 -> Behringer Dr 100 Stereo Reverb

Stage amps: '63 Blonde Tremolux w/ two original 2X10 cabinets with a '60 Ampeg Rocket/18 watt VTB Marshall clone/ Epi VJ into a Mashall 1965A

yeah...i tried talking him into a pro shop cause i am faaaaaarrrrrrr from one. the output transformer is just an educated guess from an uneducated mind.