Have you ever had trouble identifying different noises on the Bands? Maybe a usual one which we class as ‘Radar’, Digital Modes such as PSK or RTTY or maybe just something that arrives at short notice and you haven’t heard it before?
Check out a few of these noises on the links listed below. Its likely you will find the answer here;
– Plasma-TV on 3500 kHz (USB)
– Plasma-TV on 3500 kHz (AM)
– Plasma-TV (standby condition) on 3500 kHz
– TV switching power supply on 14000 kHz
– Small LCD-TV on 7000 kHz
– Large LCD-TV on 3515 kHz (USB)
– TFT Computer Monitor on 21377 kHz
– Computer monitor on 18100 kHz
– Broadband (DSL) modem on 21000 kHz
Failing that, click the link below to see a full list of the many soundfiles that should help you identify what you hear;
IARU Region 1 Monitoring System Soundfiles