“In this project, we will upgrade a traditional shortwave superheterodyne receiver with an Arduino base tuner. This tuner is capable of receiving shortwave broadcasts on 41m band and above.
This modularized receiver consists of a transistor base mixer, I.F amplifier, Si5351 clock generator, and an Arduino Uno board.
Supplies
455kHz IF Amplifier
- C1 - 100µF/16V Electrolytic Capacitor
- C2 - 10µF/16V Electrolytic Capacitor
- C3, C4, C5 - 0.047µF
- R1 - 330KΩ
- R2, R4 - 1KΩ
- R3 - 220KΩ
- R5 - 330Ω
- T1 - 50A01 / 42IF101 / 455kHz Yellow I.F Transformer
- T2 - 50A02 / 42IF102 / 455kHz White I.F Transformer
- T3 - 50A03 / 42IF103 / 455kHz Black I.F Transformer
- Q1, Q2 - 2SC724, 2SC930, BF494, BC337, or 2SC829
- J1, J2, J3 - 3.5mm Screw Terminal
RF Mixer, Filter and Detector Stage
- C1, C3 - 0.001µF
- C2 - 330pF
- C4, C7 - 0.01µF
- C5 - 10pF
- C6 - 0.02µF
- C8 - 100pF
- R1 - 100KΩ
- R2 - 22KΩ
- R3 - 220Ω
- R4 - 1KΩ
- R5 - 330Ω
- D1 - 1N34 or OA90
- Q1 - 2SC724, 2SC930, BF494, BC337, or 2SC829
- J1, J3, J5 - 3.5mm Screw Terminal
- J2, J4 - 2.54mm Pin Header
- L1, L2 - 1µH Inductor
Receiver
- Arduino Uno Rev. 3
- Si5351 Clock Generator Module”