Superhet Receiver Design

Block Diagram

Pre-selector / Bandpass Filter

• Couples antenna to RF Amp and suppresses out of band signals
• RF Band Pass Filters
• Analog Devices Filter Wizard

RF Amp

• Kits and Parts Universal Wideband Small Signal RF Amplifier
• +22dB gain

ADE-1 Mixer

• Kits and Parts Mixers
  • 9 MHz Diplexer for IF

Crystal Filters

• Located between First mixer and IF Amplifier
• SSB or CW filter
  • SSB4
  • CW3
  • 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

• Kits and Parts Hybrid Cascode IF Amp Module with AGC

ADE-1 Mixer / Demodulator

• Kits and Parts Mixers
  • Replace Diplexer with Low Pass Filter for audio range

Pre-Amp / AF Amp

• AudioAmp380