SDR receivers for different frequencies

Circuits for SDR receivers

  HF bandpass filter

HF band filter for 1,8 MHz (160m)

HF Ampifier10 kHz to 70 MHz with BFW16A                        HF Amplifier

USB programmable oscillator with a SI-570

Simple SDR converter with HF input and I/Q output suitable for a stereo pc-soundcard

A basic SDR receiver system conncted to a soundcard needs only an SDR converter and the SI-570 programmable oscillator.