SDR-4 general coverage receiver

The SDR-4 receiver covers from 0.85 to 30 MHz and follows on from our existing SDR Receiver with a Si570 low noise synthesised VFO, relay switched band pass filtering, a power FET RF amplifier and a built-in USB soundcard. Key design features include: Antenna isolation transformer with a 50 or 450 ohm impedance input for…

New Soft66ADD SDR Receiver released

Fearture 2.5MHz to 30MHz Receiving * compatible with Rocky , SDRadio, Winrad USB control from PC(XP and Vista) isolated from USB(Soft66ADI)  Isolated completely from digital circuit.(Soft66ADD) trimmer for RF gain.  high gain RF amp(Soft66ADD) These specifications change without a notice. *newer Soft66ADD can receive upto about 70MHz. sample wav file1 -> 2009.05.31 center frequency 21.2MHz…