Gefell N690 PSU Schematic needed :)

[ln76d]

Hey Guys,

i need schematic for N690 psu from Gefell (RFT).
Anyone have it and want to share?

 

[Sredna]

It seems to be a rare one.

Attaches  is a sort of manual with the switch circuit.

I have a n690 avaliable, do you need some values checked?

 

[Sredna]

Not what you asked but might be useful...

 

[ln76d]

Multum thanks!
Preamps schematic looks really similar
I also send email to gefell, maybe they will have exact schematic.
Anyway - it is really helpfull  :-*

 

[DerEber]

I think I draw this schematic once. But I am not sure if it was N690.

 

[DerEber]

I remember it had a 1:1 input transformer. I fired it up once and it had cool mids.... but a LOT of hiss. And I´m not too sensitive about noise.
Actually what is your plan ?
I might find it and scan it, but you´d probably faster drawing it. It is only very few components.

 

[ln76d]

Here's all i received from manufacturer:

http://groupdiy.com/index.php?topic=62179.0

My plan is a total profanation 

Housing would go for tube mike PSU.
PSU circuit will go to another "box" for powering gefell mikes.
Preamp? I don't know
I was hoping, that there would be ratio of transformers in documentation.
If they are only 1:1 it would be bad.
I need to measure it.
At least 1:2 would great, i could use it in microphone circuit.
I really like DDR transformers in microphone circuits