I scoped both the primary and sec, using a guitar in the input and there was some fluctuation, but i haven't measured with sig generator.
The mains fuse had popped, but i replaced it and it's staying on.
Wondering if the EL34s are all simply dead and/or not conducting properly.
The HT fuse was fine when i checked it and there's 470VDC or so on the plates. Haven't probed much else yet.
Try the signal generator to verify the turns ratio of the OT, but since it isn't open, you should be getting something. Preamp or PI tube maybe? Or something open in the signal path. Try using the signal generator into the input and see where the signal stops.
Wasn't the OT in the end, it was the 16-ohm speaker output.
When you plug into that 16, the 4 & 8 ohm outputs are cut off. The socket's 'cutting off' contacts had become corroded, and what must have happened was, mid-play, the corrosion decided it was going to win the battle.
Replaced the socket, fine. Added a bridge to make all sockets active. (Client knows, he approves)
Seems a little risky to have the OT's operation dependent on a little contact like the Cliff socket bridge.
They don't make 'em like they used to, grumble, moan.
Buddha's Guitar Tech wrote:Wasn't the OT in the end, it was the 16-ohm speaker output.
When you plug into that 16, the 4 & 8 ohm outputs are cut off. The socket's 'cutting off' contacts had become corroded, and what must have happened was, mid-play, the corrosion decided it was going to win the battle.
Replaced the socket, fine. Added a bridge to make all sockets active. (Client knows, he approves)
Seems a little risky to have the OT's operation dependent on a little contact like the Cliff socket bridge.
They don't make 'em like they used to, grumble, moan.
