Cathode resitor 2K7 in parallel with 33μF.
Grid to ground resistor 200MΩ in parallel with 200pF.
Anode resistor 100K (this should be a low noise one?).
1μF capacitor from anode to primary of a 10:1 output transformer. Other side of primary to ground. Secondary is connected to to a 60dB amplifier. (A psophometer should be great too?). Then there is a Sennheiser UPM550 filter.
The cathode of the other triode section is shown connected to ground.
Ug max 3.8mV eff.
A weighted Ug Max 2.5mVeff, 1.9mV eff normal?
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