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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only. |
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21st Sep 2020, 3:48 pm | #21 |
Dekatron
Join Date: Feb 2003
Location: Cottingham, East Yorkshire, UK.
Posts: 5,766
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Re: Morse code on SW, or alien invasion?
If it's at the weekend, and there are lots of Morse signals, you can be fairly sure it's a contest (otherwise known as 'QRM').
Apart from 'CQ' the syllable 'test' (short for contest), has a distinctive rhythm: 'dah dit di-di-dit dah' you'll hear lots of 'di-di-di-di-dit dah-dit dah-dit' ('5 N N'). Morse signal reports are based on readability (up to 5) strength (up to 5) and tone up to 9). '5 N N' means maximum readability, maximum and top marks for tone. It's nonsense as a true signal report - it just confirms that the other operator has heard you and you're in his contest log. (There will also be a number after 5NN to signify how far down the other operators log you are. (The sample of Morse includes CQ Test and 5NN).
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David. BVWS Member. G-QRP Club member 1339. |
21st Sep 2020, 4:30 pm | #22 |
Triode
Join Date: Sep 2010
Location: Dubai, United Arab Emirates
Posts: 40
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Re: Morse code on SW, or alien invasion?
Bill,depending on the years(!) the buzzer could well have been the Soviet DUGA-3 over the horizon radar situated near Chernobyl. This was a confounded nuisance on the amateur bands since it totally disregarded the ITU band allocations. Lots of information on the internet.
Regards...Phil ( G3YWP) |
21st Sep 2020, 4:50 pm | #23 |
Heptode
Join Date: Jun 2012
Location: Southeast Norfolk, UK.
Posts: 773
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Re: Morse code on SW, or alien invasion?
There's a lot of the Morse heard on the ham bands these days that is machine generated (MGM), that is by computer. I suspect that a lot of the really high speed traffic (as in the recording) is also read by computer. Some "real" CW users seem very anti MGM!
73 Roger |
21st Sep 2020, 5:14 pm | #24 |
Dekatron
Join Date: Nov 2003
Location: Heckmondwike, West Yorkshire, UK.
Posts: 9,642
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Re: Morse code on SW, or alien invasion?
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21st Sep 2020, 5:34 pm | #25 |
Dekatron
Join Date: Nov 2011
Location: Surrey, UK.
Posts: 4,400
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Re: Morse code on SW, or alien invasion?
Could that have been fax (facsimile) transmission? I recall that there was quite a lot of what sounded a bit like a coffee grinder in distress, sometimes with a hint of cyclic nature, spread around the non-broadcast/amateur allocations. I assumed that that was some sort of crude picture-scan transmission, though I never had it confirmed.
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21st Sep 2020, 7:01 pm | #26 | |
Dekatron
Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,586
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Re: Morse code on SW, or alien invasion?
Quote:
This is roughly similar to the way the US used Native American speakers as radio operators, transmitting messages which could be heard by anyone and understood by almost no-one. |
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21st Sep 2020, 8:25 pm | #27 | |
Dekatron
Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,724
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Re: Morse code on SW, or alien invasion?
Quote:
https://en.wikipedia.org/wiki/UVB-76
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21st Sep 2020, 8:51 pm | #28 |
Dekatron
Join Date: Nov 2003
Location: Heckmondwike, West Yorkshire, UK.
Posts: 9,642
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Re: Morse code on SW, or alien invasion?
Far too modern, facsimile or Mufax seems the most likely.
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21st Sep 2020, 9:29 pm | #29 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Morse code on SW, or alien invasion?
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23rd Sep 2020, 2:58 pm | #30 |
Rest in Peace
Join Date: Sep 2010
Location: Ripley, Derbyshire, UK.
Posts: 785
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Re: Morse code on SW, or alien invasion?
Originally posted by AC/HL
"One signal that always puzzled me sounded like a buzzer down a very long corridor, usually with a bit of fading, presumably some sort of machine generated signal?" If you mean a sound like wind being blown across the end of a long drainpipe, I often heard that in the 50s/60s, but never was sure what it was. Possibly a faximile transmission of some kind. There were lots of them at the time. Often they would drone on for many minutes. The system seemed to be quite abruptly dispensed with in about 1970. Tony. |
23rd Sep 2020, 5:29 pm | #31 |
Octode
Join Date: Jun 2004
Location: Reading/Fakenham, UK.
Posts: 1,326
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Re: Morse code on SW, or alien invasion?
There really is a signal called The Buzzer (aka UBV76) from Russia on 4625 kHz USB heard throughout the UK after dusk. There are plenty of YouTube videos demonstrating it.
There is also the Squeaky Wheel (4328/5473kHz) and The Pip (3756/3771 - night time; 5448/6913/6922/7056/7126 - daytime). Lots of other weird stuff listed at https://priyom.org/ |
23rd Sep 2020, 7:24 pm | #32 |
Dekatron
Join Date: Nov 2003
Location: Heckmondwike, West Yorkshire, UK.
Posts: 9,642
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Re: Morse code on SW, or alien invasion?
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