Philips el6050/12 mic rebuild

[j.frad]

Hi everyone!

I have here a pair of old philips el6050/12 mics.
It seems the tube was removed and replaced with a transistor circuit of some kind.
The original transformer, and a couple of caps around it are still here, so are the 2 resistors ans the cap by the capsule,
everything in between is a piece of perfboard with 2 transistors (bc251b/ls3819), 2 diodes and a few resistors.

The connector still has most of it's 7 pins used so it wasn't turned into a 48v mic, or so I guess...

My questions are:
-Does anyone have a clue of what happened?
-I have no intention of rebuilding the tube preamp at the moment but would it be a good idea?
-which circuit could I use to make it 48V and retain the different capsule directivities?

I'll try to post pictures...
Thanks!

 

[j.frad]

Oh and I haven't been able to find an original schematic... So if anyone has it I would really appreciate it!
I think these mics are similar to some schoeps of the time.

 

[j.frad]

Ok I found it, the schoeps version was the cm61, but I still can't find a diagram of that...

 

[Sredna]

Maybe this could help you further.....

 

[Sredna]

Or this...

 

[j.frad]

Hi!
Thanks a lot!
The cv60 schematic looks a lot like the cm61.
It seems my mics have been stripped completely. I will have to rebuild them from scratch and I haven't found the time yet.
Too much diy waiting, too much work, you know the story