Who made the transformers for Valco amps?

[Mont]

I came across a Valco chassis at a garage sale. the guy who owned it removed all the small sparts,ressisstors & ceramic caps. the power transformer is huge. the amp had 4 preamp tubes and 4 output tubes. the solid state retifier was still intact. would this transformer work for an express build?

[martin manning]

Does it have numbers on it? Post them here; should be easy to tell. You need to measure the voltages on the secondaries or find the spec for that part to answer your question.

[passfan]

This chart will tell you the current ratings Mont.

https://tubeamparchive.com/viewtopic.php?t=13747

[Mont]

T112 5246707 is what is stamed on the side, Thanks

[martin manning]

Triwec is is manufacturer, made in the 7th week of 1967. Funny, but I have one of those sitting right here in a Valco amp. It isn't original to this chassis, but it is delivering 430V DC with a FW solid state rectifier in a 2x 6L6 amp. If it was in an amp with four output tubes it should have enough current capability for an express, with the voltage being just a little high.

[Mont]

Thanks for the info. How about a thunderbolt clone, I have a schematic for a ss rectifier model.

[martin manning]

Sure, but you have windings for a fixed bias circuit and a vacuum rectifier, so you have a lot of other options open as well. It'd make a nice PT for a 5F6-A, for example.

[Mont]

COOL BEANS!