MC3335P 80m SSB receiver circuit
Using the MC3335P low power narrow band FM receiver can be designed a very simple 80m SSB receiver circuit using few electronic parts.
The 80m SSB receiver circuit is very simple, requiring few external components and it includes a simple audio power amplifier based on a LM386 audio IC .
The MC3335P low power narrow band FM receiver includes dual FM conversion with Oscillators, Mixers, Quadrature Discriminator, and Meter Drive/Carrier Detect Circuitry.
Because the IC require a input voltage between 2 and 6 volts and the LM386 require a 9 volts DC power supply , in this circuit is used two fixed three terminal regulators. Tuning of this receiver circuit is done either with a varactor diode or variable capacitor as shown in the circuit below .