IF/AF unit

This unit includes the following:

  • intermediate frequency IF amplification – MC1350
  • optional crystal filter (4 pole variable crystal Johnson type filter)
  • RX product detector – SA612
  • AF preamplifier – MC33079DG
  • RX MUTE and sidetone input circuitry
  • AF final amplifier – SA58631
  • Fast IF 134kHz Automatic Gain Control scheme – SA612,MC33079DG
  • Optional AF filter board

PCB component side

 

 

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