Four crystal diode switching circuit diagram of the IF filter


Posted on Mar 28, 2007

9-12V DC power applied to the control point A or point B, for amateur communication receiver IF amplifier, gives two different options. Power 455kHz, the bandwidth 500Hz, the f


Four crystal diode switching circuit diagram of the IF filter
Click here to download the full size of the above Circuit.

requency of the crystal is not used should be 300 Hz CW, not 2.7kHz SSB bandwidth is 1.8kHz, 2.1kHz SSB bandwidth when not 1.25kHz.




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