Difference between revisions of "Superhet Receiver Design"
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== Pre-selector / Bandpass Filter == | == Pre-selector / Bandpass Filter == | ||
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* Couples antenna to RF Amp and suppresses out of band signals | * Couples antenna to RF Amp and suppresses out of band signals | ||
* [[RF Band Pass Filters]] | * [[RF Band Pass Filters]] | ||
Revision as of 12:36, 28 September 2021
Contents
Block Diagram
Pre-selector / Bandpass Filter
- Couples antenna to RF Amp and suppresses out of band signals
- RF Band Pass Filters
RF Amp
Mixer
- Kits and Parts Mixers
- 9 MHz Diplexer for IF
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
Demodulator
- Kits and Parts Mixers
- Replace Diplexer with Low Pass Filter for audio range
