Greetings to all.
In image 1, the standard triode inclusion.
In my microphone preamplifier, a circuit is applied as in image 2.
I have a few questions.
- If I understand correctly - R4 added to the circuit to reduce the gain of the stage?
- Cathode bias (hot / cold) is adjusted by resistor R3.
Does R4 have a similar effect on cathode bias, or does its magnitude solely affect the decrease in gain?
In image 1, the standard triode inclusion.
In my microphone preamplifier, a circuit is applied as in image 2.
I have a few questions.
- If I understand correctly - R4 added to the circuit to reduce the gain of the stage?
- Cathode bias (hot / cold) is adjusted by resistor R3.
Does R4 have a similar effect on cathode bias, or does its magnitude solely affect the decrease in gain?