AT&T Archives: Television and The Telephone, a 1946 film about microwave broadcasting
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- Опубликовано: 6 сен 2024
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The content for this 1946 film was taken from a radio broadcast of the Bell Telephone Hour.
This film provides a short explanation of how the national broadcast network formed a backbone built by the Bell System to not only handle radio syndication, but also television broadcast signals, and long-distance telephone calls. The network was made up of a series of line-of-sight microwave towers combined with coaxial cable. The film explains the new technologies that reduced the size and number of wires and cables, replacing them with microwave systems and relays.
By 1947, the Bell System's microwave broadcast corridor handled television signals between New York and Boston. Western Union had a competing microwave line between Pittsburgh and Washington D.C.; General Electric transmitted between New York City and Schenectady; and Philco broadcast along the New York City to Philadelphia corridor. But while these other companies carried television signals, the Bell network carried both television and telephone signals. Even something called "radio mail" was proposed--a high-speed fax service for missives and photos to be transmitted via the microwave network.
By 1952, $40 million had been spent on the combined microwave and coaxial coast-to-coast network by the Bell System, which employed 107 towers coast-to-coast to carry telephone and television signals. The 1952 political conventions were the first to be broadcast nationwide, using this network, which included 46 cities.
Footage Courtesy of AT&T Archives and History Center, Warren, NJ
I wondered why when you see old pics of towns you sometimes see masses of wires on poles. Didn't realize it was all telephone lines.
At least you had your own initiative to bury them, in Brazil the govmt had to pass a law to force phone companies to do so, it was disgusting.
At the time, "THE BELL TELEPHONE HOUR" was heard on NBC radio's Monday night schedule at 9pm(et)....which continued through 1959, when a bi-weekly TV edition was presented on NBC television [through 1968].
1968 the year I was born.
Very interesting, I never knew what solution was used to get rid of the gigantic telephone pole swarms or that AT&T was involved with TV.
We need to get him back to explain fibre optic links.
Radio waves for Telephone! Seriously, this mans mind would have been blown by Telstar 1
Microwave was the backbone for years
Same here in England. The BBC extended their television service out from London in 1949 to across the rest of the country by microwave links.
Surely this is later than 1946, isn't it? Historical documentation suggests the NYC-Boston link wasn't in place until late 1947. It looks like the transcontinental route was activated in mid 1951, with the first TV signals being sent that September.
Television service was avaliable in parts of New York State during the latter parts of WWII. Battle movements were actually reported. None of this was avaliable in the south nor the rest of the country.
@@lilliansteele7165 TV existed, but not the microwave routes mentioned in the film.
Television existed prior to WW2. The 525 line NTSC television standard was created in 1941 and before that, a 441 line system was in use.
@David Wanklyn
Yes, I am aware of the competition between Baird and Marconi, which showed the mechanical system to be inferior to all electronic. There was also TV in Germany at about the same time, but they used mechanical scanning.
nice documentary and i loved the announcers voice . .
And he read the whole thing straight thru without a hiccup while wearing a suit and bowtie.
This has to be later than 1946. More like early '50s.
Didn't know Microwave signal diffusion was around in the postwar years.
wonder what the latency was on that coast to coast link
Your query got me thinking! Good question, by the way! Finally dug up some stats on microwave transmission latency: a microwave travels a mile in 5.4 microseconds. A microsecond is 0,000 001 or a millionth of a second. We've got to get the coast to coast mileage and start multiplying....my head is starting to hurt already....so there's going to be a delay, mathematically. What I couldn't find is the time the signal is slowed as it is repeated through the system & relayed tower to tower....I would suspect this would be the real source of delay vs. the actual transmission through the air.
Back of the envelope... I get about 0.02 second delay. For a satellite, 22K miles UP, 22K back, I get a delay of a quarter second.
wonder whats gonna happen to aaaalllll that cable
Ну наконец-то! Я было боялся, что вы не будете выкладывать новые ролики. Спасибо!
Ahhhh, it will never work.
Yes that will work, MCI....!
So why do we need satellites?,
well, they didnt exist yet. eventually they started to exist and demand also grew to such a degree where using them would be nessacary and cost effective
@@moomoobeef2173 except for that is completely wrong. They have always used under sea cables from the beginning and have done multiple documentaries explaining that 97% of all communication and internet comes from these cables. Also they have states that the cables are more efficient, easy to majntain, and budget friendly . so satellites don't really have so much a purpose up there. Even the pics they claim are sat pics are made by the weather balloons they openly admit to using and for that exact reason. Even gps can be fully explained with triangulation between 3 towers and if more involved it becomes more accurate.
@ungratefulmetalpansy thanks for the waste of time reply. Very helpful. If u actually research what I have stated you'll find I am accurate about these claims.
@ungratefulmetalpansy lol that's funny cuz the stars are my favorite proof for flat earth. With a spinning ball on a spiralling circuit heading in a direction...@ upwards of 1000mph rotation x 66000mph around the sun x 666000 mph spiraling thru space...and your claim is that the stars are just too far away to show visible change in placement on the nightly star circuits.....And this seems right to you? There's no way that in all the years earth has supposedly been huddling thru space which in assuming you believe has been billions....we still can accurately predict where stars will be and have been 100s of years back. And to that comment about the pipes. I got my info directly from the man who has worked on them. Its a public documentary available to view. So there is that proof. So no I'm not a space denyer I am constructively analysing the evidence to come to my conclusion. That's not supposed to be a bad thing....
@ungratefulmetalpansy yes, but like i said, the stars continue to rotate on the same circuit. Yes they move around in the sky but its the same movement since the beginning of time.
Marketing Campaigns & Corruption!
Wow telephone used cable before cable companies
world always shall remember and mention everything good done in medicine, machines electricity and tech with gratitude of comforts connectivity it brought them , and is advancing in leaps and bounds forward these are facts,its a pity Nations having best of everything with them still keeps half of its population in dark ages refusing to do something about that.
Light highway
Ahem! Excuse me but today we have what called "fiber optics" a tube the size of a human hair Carrie's billions of calls and video and even data. And cellphones
Electronic circuit looks like brain circuit!!, microtubes in the cell
l
Really old.
the first old video that was boring as hell... usually these kinds of videos show video with an exclamation