Neumann CMV5 output transformer ratio and VF14 schematic version as curio

Still didn't found answer - what's transformer ratio for standard EF12 version.
Anyone knows?
http://www.elektroakustika.cz/images/cmv/cmv5/cmv5ef12.jpg


Funny thing happened on the way to the ratio find!

I found schematic for CMV5 with , I don't know is it commonly known but always worth to paste here
http://www.elektroakustika.cz/images/cmv/cmv5/cmv5vf14.jpg

There's a lot of other great materials on elektroakustika.cz!

Anyone knows anything about something?

The transformer GN107 has 6,7:1 ratio. This transformer is manufactured today only by Haufe  on special order, for Andreas Grosser, who is engaged in repair of old microphones. The transformer is a copy of the technical characteristics of old GN107.

Thanks o3misha!

I was suspecting 6-7:1 ratio, but do you know is this the same or similar to the EF12 version?
I didn't found schematic with EF12 which have transformer model written.

I know only the one GN107. I have no idea about EF12 version's transformer, but if it is GN107, then it is the same. I know also, that there is U47 version with EF12 tube. bV08 is close to GN107 ( almost the same ratio) but with a bit more clarity in high end and a bit less low end.

Is there any existing schematic (original of course) of U47/EF12?

ln76d said:

Is there any existing schematic (original of course) of U47/EF12?

Click to expand...

I believe the highly esteemed Wagner U47 uses the EF12.

Googling will give you quite a few schematics, but most are "inspired by" and such.

And the "real thing" was, in any case at some point, hidden under a veil of secrecy.
Some whispered only guys like Grosser and Wagner had it.
:-X


Anyway, I may have something for you, Piotr. 

Yeah, i know Wagner version also tried with EF12 build 47 circuit but i would be happy if the original schematic will be existing and someone could share it

You may want to check your mail.

No way!!!

Hank -  is this a joke or it's original?
What's the origin of it?
Can we share it?

Not sure on all three counts.

Let's move slowly for now. 

Carry on, please. 

Ok

You make my day anyway!!!

ln76d said:

Ok

You make my day anyway!!!

Click to expand...

I got that from the source...

lampas said:

I got that from the source...

Click to expand...

Hey Vili,

not exactly know what you have in mind, but already writing email to you

Question mark here, too.  :

Anyway, Andreas Grosser has lots of success with his VF14, drop in, alternatives.
And I believe Gunther Wagner more or less stopped making U47 clones altogether for lack of original parts (other than the tube).
Flea still uses the EF12, though.

Henk - check email

ln76d said:

Henk - check email

Click to expand...

Nothing, yet.

Watching the game? 

I send it again.
No not really enthusiast  ;D
Sit on the balcony, drinking coffe absorb the sun