|The FA SDR KITs are easy to build, the price is moderate. you need a computer with stereo soundcard and SDR-software. My VR-5000 has a 10.7 MHz IF out connector, so i ordered the
10.7 MHz IF version. at the moment i use baudline as a bandscope. software demodulation is possible with other software, for example linrad.
|here is howto change SDR KITs for 600 KHz, 21.4 and 45 MHz IF (geman language). |
|the local oscilator of the SDR KIT laecked into the receiver. in AM an FM mode its no problem, but in SSB i heared a continius carrier. first i tried a 20 dB atenuator between the IF-out and the SDR-kit, the carrier diapeared but now the signals ware to weak. after some experiments i placed a 2 stage IF-anp between the RX and the SDR. now the sensivety is good and the carrier is below the noiselevel of the RX.