SDR-4+ HF Receiver

The SDR-4+ is an HF general coverage SDR receiver covering from 0.85 to 40 MHz. It has a Si570 low noise synthesised VFO, relay switched band pass filtering, ultra high IP3 E-PHEMT RF amplifier and a built-in USB soundcard. Key design features include: Antenna isolation transformer with a 50 or 450 ohm impedance input for…

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…