IF Amp(455KHz) 2 transistors and diode AM demodulator by one diode / RF gain estimation

I tried to design 2 TRs IF AMP (455KHz) with AM diode detector as a step to design it with AGC(Automatic Gain Control). 

I tried to understand how much RF gain estimated by BJT TRs.

The outcomes show high gain and good tune characteristics is not always easy to design it.

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