gear porn inside (ml-1 tube pre)

[MHanson]

If you have the time ...

Please trace the circuit and share it with us here.


Michael

 

[MaxDM]

o.k. so this came through the other day.... made by the mastering lab, it's an all tube mic pre... It used 2 tubes a 5751 and an e188cc

(The Front)

(shot of the power transformer) Covered in a metal box for shielding

(Power Supply Board)

(Tube Board)

(The Board other side)

(Tube board back side)

Hi

I was looking for a reason to keep my e188cc tubes, as I am selling off some stuff and I came across this thread.

Am I right in thinking that the e188cc is used as a cascode for the line output?

 

[MaxDM]

I looked at the pics and it appears to be a White Cathode Follower, which explains the lack of output transformer  ;D

The only values I was able to see were 809 ohm for the top anode resistor and 470K for the grid bias resistor, with a 6K8 grid stop (bottom half).

The top half grid also has a grid stop.

I wonder if anyone else has any other photos of the first tube, which would be the voltage gain section?

 

[AusTex64]

First tube is 5751.