Voltages in an original AKG ELA M251 AC701 version?

[rock soderstrom]

Hi guys, I am currently working on a cardioid only DIY ELA M251 with a 6S6B tube. I'm thinking about the correct biasing of the tube, I'm orienting myself on the AC701 version, I currently have a B+ of 120V, Ra=200k and a cathode resistor of 3.6K (it's actually a 5k pot).

I would be interested in the voltages in the original ELA M251 with AC701 tube. Is the B+ really 120V? (I can't read it in the attached schematic)
What is the voltage drop across the cathode resistor, what is the voltage potential at the anode?

The total current in the microphone appears to be 1.1mA according to the schematic.

I searched for it on google, but found nothing. Can anyone help?

 

[Khron]

I would be interested in the voltages in the original ELA M251 with AC701 tube. Is the B+ really 120V? (I can't read it in the attached schematic)

People seem to think / say so..?

https://groupdiy.com/threads/akg-ela-m251-with-ac701-neuman-m49-circuits.48399/

 

[rock soderstrom]

People seem to think / say so..?

Thanks. Yes, it seems to be so, but unfortunately no hard proof in this thread (which I knew)

B+ is not so important to me, the voltage at the cathode and anode would interest me more.

 

[Accelerator]

@rock soderstrom

As far as I search, this one is the only one 6S6B (6C6B) tube datasheet that I could find with grid curves, so I attached here with the hope that maybe helps you for drawing the load line…

Also as you know, there isn’t any extra help for those Soviet Russian tubes by the online tube calculators, so if you know any American or European Sub. Tube very similar to the Soviet Russian 6S6B (6C6B) it will helps more to calculate the Grid Bias Voltage (V), the Iq(mA at 60 Vq(V) and by them the correct cathode resistor if the Vb is 120 Volts…