What is the anode current on the CV2269 operating with 1.3V on the Pleiades V1 head microphone amp

Measurement was done across the anode resistor of 27KΩ.


(The Pleiades V1 has the positive terminal of the battery connected to chassis or XLR chassis pin. So the potential different was measured between this pin and anode).

The reading was 163mV.


So by Ohm's law:


Ia = 163mV : 27ΚΩ = 6μA


The sound is very nice with a Sennheiser MD441 U3 or a Sennheiser MD211 N.


The input transformer is a military type Freed with inductance of 140mH at 96Hz and 40mH at 1.28KHz. It does a very nice Fletcher-Munson, voice effort compensation for singing. See previous posts.