Input impedance of if and rf amplifier

Please post a schematic diagram of the IF amplifier you are concerned with. If IF transformers are involved, specify their parameters. Is this a solid-state IF amplifier or a vacuum tube IF amplifier? Virtually all IF amplifiers ARE rf amplifiers tuned to a specific "center frequency" (the intermediate frequency) with specific bandwidths. Adding a resistance load to a tank circuit affects its Q and, depending on the intermediate frequency, may also add parasitic inductance and parasitic capacitance that results in detuning.

Please tell us what you are trying to DO and someone here may be able to help you. How much experience (if any) do you have working with radio frequency circuits, and at what radio frequencies do you have this experience?

 

That was less than helpful. Is this homework? Your so-called schematic is incomplete. It appears to be part of a text book page explaining one method of inserting an Automatic Gain Control (AGC) into a receiver circuit.

How does any of this relate to your original question concerning "dynamic impedance" and "loading and detuning" of tank circuits?

Why haven't you answered or attempted to answer my question regarding your experience with circuits utilizing radio frequencies? Why haven't you explained what you are trying to DO? Don't you think you would be better served by trolling some other forum?