Has anybody else notice the weird sweeping tone that clutters the space around 4539 khz? I am able to hear it on my shortwave almost 24/7, and so is my uncle who lives 2 hours away (which eliminates local interference) Is sounds like a transmitter that is rapidly going from a lower frequency sweeping to a higher frequency and then starting over again. at different frequencies the sound is different, sometimes with two tones but all near 4540 khz. this has been going on for at least a year now.
2007-12-02 08:10:03 · 1 answers · asked by Gustard 2 in Science & Mathematics ➔ Other - Science
That's in the 60-meter International broadcast band. There doesn't seem to be a broadcast station officially allocated to that frequency. It might be a spread-spectrum experiment that's not working too well. 2 hours by car is probably 100-150 miles, which is a short distance for 60 meters, so it could still be relatively local. It could be something like medical diathermy equipment that's not properly shielded. I wish I still had the equipment to listen myself; sometimes I miss those days.
2007-12-02 16:53:35 · answer #1 · answered by Frank N 7 · 0⤊ 0⤋