U47 with ef12 schematic

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Bardamu

Member
Joined
Nov 25, 2017
Messages
10
Anyone have the Andreas Grosser (or any other) u47 type circuit based on the ef12 tube? Preferably with remote pattern switch.

I can't find it anywhere.

Thanks
 
http://www.tab-funkenwerk.org/articles-tech-documents-2/ami-microphone-schematic-archive/u47-schematics/
 
ef12 is different pinout and operating point from the ef14 at tab-funkenwerk though, be careful! 

Some great info here

http://www.moxtone.com/mU47_U47_part3.html
 
Thanks, but I'm specifically looking for a schematic around the ef12. It was posted in a topic from a few years back, but the link is dead.
 
Long time ago I used to be kind of a "librarian" in this place...

http://img.photobucket.com/albums/v283/jazz347/47-inspired%20mic%20build/EF12_47_11.png
 
Great, thx!

That second one you might have gotten from this (dead) link I talked about earlier:

http://www.xaudia.com/omnip/Mics/STU47/STU47schemo.png

Was posted in a thread called "Insight into "U47-inspired" with EF12 tube?"

However, think I'll go with the first one.
 
IIRC there was one with 120VDC and -6VDC power supply with fixed bias
 
HI guys,

I can't figure out how to connect the ef12 to the u47 circuit.
Is this wrong? Or is this right?
 

Attachments

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