Aethra preamplifier

[maurizionatoli]

Hallo diyers!
Is anybody out there who knows and has the schematic of this module?
I have 5 of them mounted into the PS/level meter. They are all in mint conditions (apart for the little caps of the knobs) , sound fantastic and as you can see, they are double, to have for each channel the double output to switch in case of overmodulation, all transformers. I bought this some year ago but I would like very much to have the schematica to service.
Anybody can help?

 

[Ike Zimbel]

I have nothing for you, except this: Every single device of that vintage that I have ever been into has had a least one of the yellow Frako brand capacitors go bad. If you are mainly interested in making sure these work, and continue to work, I would deal with those caps first.
One more thing...I had a similar looking pre-amp have some weird issues that turned out to be wires that had broken off of switch contacts but stayed exactly where they were because of age and stiffness, so giving every wire a gentle tug might save you some grief. There's a thread about this here, somewhere.

 

[maurizionatoli]

Hi Ike, and many thanks for your answer!
Sadly I think I never find what Im looking for, hope never fault!

Again many thanks

Maurizio