Le 12/02/2025 à 03:34, Dan KE6PO via
groups.io a écrit?:
S1 & S2 is understandable, but the power issue still
escapes me. The only point at which V+ power can reach the
circuit is from XLR2. But I don't see how power gets
distributed. If V+ is present on pin 2 or 3, it will only feed
the drain of Q3 or Q2. Assuming that there is sufficient Vin
generated by the microphone to trigger the gates of Q1 & Q4,
there is no V+ on the drains of Q1 & Q4 to feed through to
the gates of Q2 or Q3.?
?
Clearly, I am missing something about FET functionality.? Can
I get a clue?
There is conduction between drain and source in a properly biased
FET.
From pin2, current flows through Q3, then Q4, then R6 and R7, back
to pin1.
