New Supri 1605RJ

[drewl]

Anybody work on any of these new Supri amps?
Anybody find ANY documentation, or even tube compliments?

I've done a few now, and they're a pain to figure out.

Anyway, fixed this 1605RJ, 5w with reverb.
Somebody was in here, who know what they did

Anyway, when I plug the reverb send cable into the tank, the sound gets distorted.

Looks like reverb is fed from the output trans into a 12AX7, that is paralleled.

Cables, tank are all good, tried known good cables and tanks.

It's quite a bit better using a 12AT7 as the driver, but with no tube listing who knows what's supposed to be there.

That's Supro!
Damn auto correct

[nosaj]

All I can find on it here. I looked for tube replacements

nosaj

[tdlunsfo]

I have a delta king 10 on the bench from the store where turning up the reverb pot breaks up the signal. Brand new amp and its twin brother doesn't do this. Appears to be a TL072 reverb circuit but I'm waiting on a schematic to find out.

[Jon Snell]

They use an ECC81 (12AT7) as reverb driver, similar to most Fenders. A 12AX7 will run out of power and distort.

[Kevina]

No service data is released by Supro. I know two techs who work for a distributor, and they are not allowed service data, anything they cannot repair has to be returned to Supro.

[drewl]

Damn, it's not rocket science, or nuclear secrets.

[Kevina]

They will not release the data because it will probably look like this; not very American is it?

[J M Fahey]

Well, MAYBE itīs somewhat related to old Supros ... maybe itīs, like Monty Python says,something completely different!!!

Just look at the Roland 80XL thread.

*Looks* somewhat like the 80īs Cubes , .... but inside ....

[drewl]

They will not release the data because it will probably look like this; not very American is it?

Nothing wrong with that, just crop the writing on the sides and nobody would know.

This one is all tube.