Hi all...
I've been looking at some solutions on designs in tube mic preamps and I must clarify a few things for myself and I would like to get the answers from you guys vast experiences and knowledge.
Anyhow... looking at a mic input transformer and desired input impedance I know that the input impedance is a reflection from the load at the secondary.
I also know how to calculate parallel resistor values but my question is how the in this case third resistor (R3) is affecting the other two (R1 and R2)?
Since it is AC and the capacitor allows AC to pass I guess the third resistor is in the calculation as well? Why using the cap and the third resistor? Well, that's one of the thing to understand as well.
Forgive me if this is too simple
Best regards
// John
I've been looking at some solutions on designs in tube mic preamps and I must clarify a few things for myself and I would like to get the answers from you guys vast experiences and knowledge.
Anyhow... looking at a mic input transformer and desired input impedance I know that the input impedance is a reflection from the load at the secondary.
I also know how to calculate parallel resistor values but my question is how the in this case third resistor (R3) is affecting the other two (R1 and R2)?
Since it is AC and the capacitor allows AC to pass I guess the third resistor is in the calculation as well? Why using the cap and the third resistor? Well, that's one of the thing to understand as well.
Forgive me if this is too simple
Best regards
// John