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General Vintage Technology Discussions For general discussions about vintage radio and other vintage electronics etc. |
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6th Oct 2017, 5:56 pm | #1 | |
Nonode
Join Date: Feb 2005
Location: Worcestershire, UK.
Posts: 2,533
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Rtty
Quote:
I remember when, in 1966, I was given my first radio - a Murphy A122 - and I discovered short waves for the first time, with its critical tuning between jam-packed stations and its 'robot noises': RTTY. Much later, I amazed my 8 year old nephew with these... he was convinced they were chirping, squawking robot birds! I presume RTTY (radio teletype) just isn't the presence it once was everywhere on short wave. I've looked on Wikipedia, and it seems to be still used for weather services. Steve |
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13th Oct 2017, 7:51 am | #2 |
Dekatron
Join Date: Apr 2005
Location: Bewdley, Worcestershire, UK.
Posts: 4,748
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Re: Rtty
Hi Steve.
I believe that RTTY is still used on the amateur bands. I used to be a regular RTTY operator using a Commodore home computer. RTTY has propagation characteristics similar to Morse, and performs very well under weak signal or noisy conditions. The main problem with RTTY is the sheer time it takes to complete a contact... particularly if you are communicating with a slow typist!
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13th Oct 2017, 11:01 am | #3 |
Octode
Join Date: Jun 2004
Location: Reading/Fakenham, UK.
Posts: 1,323
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Re: Rtty
The best RTTY signal to check your gear is DDK9 10100.8 kHz (and other frequencies) running standard 50 Baud +/- 225 Hz. There's amateur stuff too. There are also signals that sound like RTTY, but are not standard speeds/tones and are probably encrypted.
Of course there are lots of data transmissions from the military, etc. that as far as I know are un-resolvable by the casual listener. There are still quite a few AM transmissions on SW, but not many to Europe any more. Ian Last edited by AC/HL; 13th Oct 2017 at 12:21 pm. Reason: OT aside edited |