AOR AR-DV1 – Analog and digital voice receiver

            AOR AR-DV1 is a stand-alone SDR receiver which can receive both analog and digital transmissions. It is compatible with many popular digital modes: DMR (Digital Mobile Radio) dPMR (Digital Private Mobile Radio) D-Star APCO-25 NXDN Yaesu Digital Alinco Digital Digital-CR AOR G4GUO (=used in…

Continue reading

SDR from 100KHz to 6GHz

The Crimson SDR from Per Vices is the future of software defined radio. The flexible wideband, high-gain platform comes equipped with four independent receive chains and four independent transmit chains, each capable of up to 200MHz of RF bandwidth up to 6GHz. At the core of the digital front, Crimson…

Continue reading

HF receiver WJ-8711A

The WJ-8711A is a fully synthesized, general-purpose HF receiver for monitoring RF communications from 5 kHz to 30 MHz with 1-Hz tuning resolution. By combining analog and digital signal processing (DSP), the WJ-8711A achieves high performance at low cost. DSP techniques accomplish functions such as noise blanking, IF filtering, AGC,…

Continue reading

Noble Radio NR-4SC 4 Meter SSB/CW Transceiver

The Noble Radio NR-4SC is a simple to use 10 Watt (minimum) 4 Meter SSB/CW transceiver. The radio operates USB and CW. The NR-4SC uses a single conversion design with an IF frequency of 10.7 MHz. Front end bandpass filters limit out of band signals into the RF Preamp stage.…

Continue reading

All Digital Transceiver ADT-200A by HB9CBU

The project name ADAT (All Digital Amateur Transceiver) denotes an ongoing development of an amateur transceiver which consequently uses digital signal processing. Therefore, all relevant functions are performed by software providing a very high degree of flexibility. Similar products are available on the market as Software Defined Radios (SDR), but…

Continue reading

Understanding and solving RF interference problems

This tutorial by Jim Brown (K9YC) describes, analyzes, understanding and solving RF interference problems. Chapter 1 – Some Fundamentals Chapter 2 – Ferrites Chapter 3 – Back to the Basics Chapter 4 – More Suppression Applications Chapter 5 – Suppressing Interference To Your Ham Station Chapter 6 – Baluns Chapter 7…

Continue reading