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Posted by Glenn [ sta_gje@att.net ] on January 13, 2026 at 16:52:02.
In Reply to: Re: 205 kHz Mystery? posted by Bruce WA1HGJ on January 13, 2026 at 14:53:28.
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I do have some LED lighting but it doesn't bother my radio system. I am not sure why. Some of these switch mode power supplies I have will drive you up the wall. I have Ferrite beads on the SMPS's that I use all the time and keep the others that don't have beds off when not needed. I know the markers for the computer monitors I have. The "channels that come on at the exact same time are mostly pure carrier with the exception of one and I haven't determined the type of modulation used on it. I live within a quarter of a mile from a 230 KVA power line and about 3 miles from a huge substation. I am pretty sure and I will prove that these are power line frequencies. It is my understanding that they can use between 50 KHz and 500 KHz in the power industry. They also have at their disposal optical cable woven into high voltage transmission cables and their microwave systems. I don't know why the government has given them such a big chunk of radio. This LF communications looks like to me to have no security placed on it. I can see up to seven carriers at any given time when the polling starts and since one channel has modulation I think it may be the brain channel. The rest are probably status channels. Low tech!
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