Superhet Receiver Design

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Block Diagram

SuperhetBlockDiagram.png

Pre-selector / Bandpass Filter

RF Amp

ADE-1 Mixer

Crystal Filters

  • Located between First mixer and IF Amplifier
  • SSB or CW filter
    • SSB4
  • CW5

VFO/Local and BFO Oscillators

  • VFO-003
    • Si5351A based
    • Arduino Pro Mini
    • OLED Display
      • Detachable for remote mounting
    • Controlled by Rotary Encoder
    • Temperature Controlled Crystal Oscillator
    • Triple output (uses 2 of the 3 outputs)
      • VFO for received frequency plus 9 MHZ

IF Amplifier

ADE-1 Mixer / Demodulator