Difference between revisions of "Superhet Receiver Design"

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* [[Kits and Parts Mixers]]
 
* [[Kits and Parts Mixers]]
 
** Replace Diplexer with Low Pass Filter for audio range
 
** Replace Diplexer with Low Pass Filter for audio range
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 +
== Pre-Amp / AF Amp ==

Revision as of 12:55, 28 September 2021

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

Pre-Amp / AF Amp