Dynacord Eminent Tube Preamp

[vowan]

Hello !
I own old german amplifier from early 60's - Dynacord Eminent.
Some years ago my friend used one as guitar amp - power amp build with 2 EL34.
Except 2 instrument input there are 2 microphone input with 2 Sennheiser TM003 transformers and ECC 83 tubes.
I checked one mic channel taken signal from echo send.All works fine.
But I am not assured that it is a correct point for signal removal.

My question: where I should take a signal for correct work and what to add in a chain before sending in DAW? What i must re-cap?

I attach the circuit
http://www.albertkreuzer.com/pics/el/em ... re_sch.gif

http://i122.photobucket.com/albums/o278 ... minent.jpg

I will be grateful to any information

Regards
Vladimir