Analogue signals are great in that they are simple enough to generate and demodulate, but they suffer in that the signal quality degrades when sent over a noisy radio link. With radio voice systems, this is heard as pops, crackle, hiss etc. and the problem gradually gets worse as signals get weaker. Human ears do […]
The GB3IM-S amateur radio repeater on the summit of Snaefell was brought back into service on 17th March. This led me to discover that the output frequency of 433.125 MHz becomes unusable when driving through Ballasalla, due to some strong interference on that frequency. Now, in these modern days where everything has a computer inside […]
While I was out walking the dogs today, I noticed that GB3GD is back in service. GB3GD is the callsign of an amateur radio VHF repeater, based on the summit of Snaefell on the Isle of Man. A repeater is a radio receiver and transmitter combined (with some control logic too) that takes weak signals […]