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  1. B

    Unusual pulsing signal on 20 meters

    Listened on 14.233 MHz a good deal since yesterday afternoon. Heard the weird and wonderful variety of 'tweedling' and warbling sounds characteristic of most SSTV systems. Also occasionally heard the steady whir I now associate with the EasyPAL system. Heard nothing, though, that resembles the...
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    Unusual pulsing signal on 20 meters

    None of the explanations offered so far, for the unidentified signal on 14.320 MHz seem to be a good fit for what has actually been heard. That, and the persistence of the signal over a period of at least 7 weeks seem to mark it out as something unusual. The signal now appears more likely to be...
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    Unusual pulsing signal on 20 meters

    Thanks for your response. I'd not heard of EZPAL before. It must be quite rare. Took a good deal of hunting to find a site with a wav file of the sounds such signals make over the air. I listened to this and found that the sound is a steady whirring, which is not surprising in a digital mode...
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    Unusual pulsing signal on 20 meters

    Thank you. That would be very helpful. I haven't heard the signal in a couple of days; it often appears again after being absent for 2 or 3 days.
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    Unusual pulsing signal on 20 meters

    The pulsing signal heard on 14.320 MHz as I type this. Up to S. 5. No trace of rapid sub-pulses within long pulses, which were noted recently. If present, they should be discernible, as the signal is clear and distinct.
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    Unusual pulsing signal on 20 meters

    I can sympathize on the static. We get it here in California a good deal, too. Mostly from the power mains. A sound clip of the signal could be helpful in finding an explanation for it.. Someone might hear it and recognize what type of signal it is. Would be interesting, too, for those who...
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    Unusual pulsing signal on 20 meters

    Avistar23; Thanks for your response; Can you recall, in a general way, the time of day when you've heard this particular signal on 14.320 MHz or, roughly speaking, the date when you first heard it?
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    Unusual pulsing signal on 20 meters

    Morse123; Thanks for your response. Not set up here for making audio or video files, unfortunately. Have listened to a great many YouTube videos of unidentified radio signals, without finding anything like what I'm hearing on 14.320. Have never run across its like before in my own listening...
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    Unusual pulsing signal on 20 meters

    Heard the unusual signal again today, intermittently, from about 20:35 to 21:30 U.T.. Signal as strong as S. 5 , at times. The long pulses could be heard to be divided up into four or five very rapid pulses, so rapid that their separate nature might be missed. Given normal 20 meter propagation...
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    Unusual pulsing signal on 20 meters

    Interesting idea. Thinking outside the box, as they say. I rule nothing out at this point. Interesting that no ham I've described this signal to seems to recognize what technology or modulation mode is being used. I recall reading that tone-modulated pulses are not used, (and are in fact...
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    Unusual pulsing signal on 20 meters

    Since Dec. 30th, I have been hearing an unusual pulsing signal on 14.320MHZ. It has 50 regularly spaced, long, dash-like pulses per minute. These pulses have rather rough-sounding audio modulation, in two different tones. The signal alternates the two tones, 37 pulses in one tone, then 37 in the...