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  #26  
Old 4th June 2017, 21:17
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Quote:
Originally Posted by Wismajorvik View Post
Lincompex was used primarily on point to point HF circuits.
It was also used on QE2 to copy Press (Daily Telegraph?) to produce a daily newspaper for the passengers. I don't know how successful it was.
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  #27  
Old 5th June 2017, 11:13
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Varley Isle of Man Varley is offline
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Do you know what the terminal equipment was, Ron? Lincompex I learned (never saw) was for voice so it sounds like an attempt to use a PSTN facsimile machine.
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  #28  
Old 5th June 2017, 12:57
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Quote:
Originally Posted by Ron Stringer View Post
It was also used on QE2 to copy Press (Daily Telegraph?) to produce a daily newspaper for the passengers. I don't know how successful it was.
I have a vague recollection of Lincompex being installed on noisy landlines by Hughes in Saudi Arabia...anything for that extra buck.
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  #29  
Old 5th June 2017, 22:24
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Lightbulb

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Originally Posted by Varley View Post
Do you know what the terminal equipment was, Ron? Lincompex I learned (never saw) was for voice so it sounds like an attempt to use a PSTN facsimile machine.
You are correct, David, it was Piccolo (not Lincompex) that was used for producing the newspaper on QE2. If I remember correctly (and, if the foregoing is any guide, that is most questionable) the Lincompex was made by a GEC company but I can't recall which part of the group. It certainly wasn't Marconi!
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  #30  
Old 5th June 2017, 23:22
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I believe Lincompex was a GPO design and the kit was manufactured under licence by several companies. I attended the STC factory in Newport Wales where it was being produced. Piccolo was developed by the FO and again manufactured under licence.
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  #31  
Old 6th June 2017, 00:06
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Thanks Ron. Piccolo I heard of and may have heard but not knowingly experienced operationally. I'll Google it before I ask more. David V
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  #32  
Old 6th June 2017, 01:11
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http://alancordwell.co.uk/Legacy/hfradio/dwsint.html
Information on one of the piccolo systems possibly around mid 60s. There were variations later and also an earlier basic system which I recall came out of Belgium and used 100hz steps.
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  #33  
Old 6th June 2017, 09:53
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Thanks for that 'W'. wonder if there is any similarity with multiplexing telex connections over PSTN (one voice channel could be assigned to ? telex channels).
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  #34  
Old 6th June 2017, 11:18
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Not much experience with the PSTN but would assume that between exchanges multiplexed narrow band fm would have been used. Nowadays if telex was required then time division multiplex would be the system, telex being far slower than the bit rates available. There was an international half speed telex system in the 70s and I recollect that exchanges would introduce 'nulls' in the traffic which caused severe problems with synchronised cryption systems.
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  #35  
Old 10th June 2017, 18:47
Naytikos Cayman Islands Naytikos is offline
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Troposcatter works OK in cold climates where the atmosphere is reasonably stable, a nightmare in the tropics.

Last edited by Naytikos; 10th June 2017 at 18:49.
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  #36  
Old 11th June 2017, 13:05
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My experience was in the middle east and with both frequency diversity and antenna ( billboards) diversity Systems were reliable for better than 99.9% of the time.
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  #37  
Old 13th June 2017, 22:58
Naytikos Cayman Islands Naytikos is offline
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But in the Caribbean, without oil company funding, one had a single 30-foot dish at each end and four fixed frequencies, one for each supposed circuit. It was common to get through a whole roll of teleprinter paper overnight by the machine churning out random characters one or two to each line due to atmospherics.
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  #38  
Old 17th June 2017, 15:47
Sparks69.5 Sparks69.5 is offline
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RAF Stenigott had a couple of Trop Scatter dishes for NATO. Ace High System if I remember correctly.
Whole lot just abandoned about 25 years ago.
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  #39  
Old 17th June 2017, 17:03
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Quote:
Originally Posted by Sparks69.5 View Post
RAF Stenigott had a couple of Trop Scatter dishes for NATO. Ace High System if I remember correctly.
Whole lot just abandoned about 25 years ago.
They did indeed, the whole lot was collapsed on to the ground and just left for years, not sure if they are still there or the Scrapmen took them.
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  #40  
Old 17th June 2017, 18:38
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This is what the winds in Cornwall can do to a 30 metre dish ....
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File Type: jpg dishdown.jpg (42.0 KB, 35 views)
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  #41  
Old 19th June 2017, 22:15
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No Sky Sports tonight.
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