I've built a Class C amplifier for educational purposes and believe I understand the major concepts on how it works. The only piece I'm struggling with is how to calculate for the base resistor. From the resources I can find, they authors talk about calculating the RC base network for 10 times the input signal time. My experience is quite different.
The circuit below has the following:
Input signal: 11.628 kHz (tuned to the tank circuit) @ 2v pp
Tank circuit: C3 = 213nf, L1 = 877mH
Base clamping circuit:
C1 = 100uf
R = is a variable resistor. I've dialed it to 1.1K ohms, which produces the optimal output pp signal. The circuit works as expected, but just lost on getting the right math.
My question is: what is the formula to correctly choose the base resistor? Any good resources on negative clamping circuit calculations?
The circuit below has the following:
Input signal: 11.628 kHz (tuned to the tank circuit) @ 2v pp
Tank circuit: C3 = 213nf, L1 = 877mH
Base clamping circuit:
C1 = 100uf
R = is a variable resistor. I've dialed it to 1.1K ohms, which produces the optimal output pp signal. The circuit works as expected, but just lost on getting the right math.
My question is: what is the formula to correctly choose the base resistor? Any good resources on negative clamping circuit calculations?
Attachments

10.6 KB Views: 4