I love the style of these old documentaries. Very informative with perfect music

The engineering back then was incredibly impressive, we we’re definitely smarter back then, just look at the achievements we made and designed by hand and with slide rules, no computers or CNC not to mention manufacturing our own quality materials instead of buying crapy materials from China or other countries...

what they didn't mention was each amplifier got 200V from a string of 100 inline voltage dividing resistors; with the UK end providing +10,000 volts and the American end supplying -10,000 volts.

thing you learn in lockdown

This blows my mind, we had this back then, and still people think that they see ufos in the sky..

@LiLi-or2gm

3 жыл бұрын

Yeah, it's crazy how many people are still superstitious, scientifically illiterate, lack basic math skills, and can barely form a sentence.

@andybaldman

3 жыл бұрын

@@LiLi-or2gm Yes, and the irony is that all of this tech isn't helping any of them get any smarter. In fact, it seems like the opposite is happening.

@gormenfreeman499

2 жыл бұрын

Wasnt really long time ago, we just don't live very long. As you get older you realize 1 year is barely anything.😳

@Thebasicmaker

2 жыл бұрын

too bad US navy declared they saw ufos and they are real

That was great. Thanks!!

When I was young I was a rigid repeater. Now I'm neither rigid, flexible or repeating.

@Richard_K1630

3 жыл бұрын

Just a shitter.

@RubyBandUSA

2 жыл бұрын

WTF?

@rambles2727

Жыл бұрын

That goes hard

@robertschemonia5617

Жыл бұрын

Got to say, this is the funniest thing I have heard in probably the last month or two. What a great nerdy and dad joke all at the same time. I'll have to file this one away in my joke "dad-abase".

I am not quite sure how anyone can give this, or any Periscope Film upload a thumbs down 👎, but that’s their right to do, but just for a change, maybe they might actually say WHY they don’t like this, or any other film, to many people hide behind just giving a thumbs down without saying why, I find that disrespectful.

@mitchdakelman4470

3 жыл бұрын

This is the only extant print of the film I have ever seen. AT&T films generally dealt with their communication business and the R&D that made good telephone service possible, and they were all well done by professional companies that did classy industrial documentaries such as this one

Interesting.

I saw an old document which showed an underground facility built in 1962 to protect our end from a nuclear attack? This was around the time of the Cuban missile crisis.

This cable was laid the year I was born. Now I Skype or Google Duo video calls from Texas to Australia every day, and as I make those calls I think these methods can't be improved upon. I have a feeling I'm wrong about that.

@aramboodakian9554

Жыл бұрын

Of course now the oceans are spanned by hundreds of fiber optic cables, but the coaxial cables with repeaters were an incredible accomplishment. The vacuum tube better known to the British as valve repeater amplifiers ran continuously for over 20 years without failure. Transistor amplifiers were to new at the time to trust their reliability to last the 20 years to make the large monetary investment pay off.

9:55 Holy shit, that facility is still there, in Newington, NH.

According to Wikipedia, this telephone line, called the TAT-1 cable, was decommissioned in 1978.

@akyhne

3 жыл бұрын

en.m.wikipedia.org/wiki/Transatlantic_communications_cable

@johnstudd4245

3 жыл бұрын

Everything is satellite now days.

@akyhne

3 жыл бұрын

@@johnstudd4245 I don't think so. Most communication - VoIP, internet etc. are via sea cables. Satellites have way too much delay.

@johnstudd4245

3 жыл бұрын

@@akyhne I stand corrected

@Stringer25

3 жыл бұрын

@@johnstudd4245 Most of the communication traffic is now through high speed fibre optic TAT-14 and other private transatlantic cables. All of the previous TAT cables have been decommissioned.

How did the undersea repeaters work without batteries? Doesn't amplification of telecom signals require power?

@Johnny2Starz

Жыл бұрын

They had a separate wire that supplied over 4000 DC volts to power the repeaters.

@patdbean

3 ай бұрын

​@@Johnny2Starzthe same is true for today's fiber optic cables, they have repeaters and many thousands of volts passed along the cable to drive them.

How did those amplifiers/repeaters get power? What was the power used? 115vac? 240vac? Something else?

@davenone7312

2 жыл бұрын

Google says it uses a large DC voltage with positive at one end and negative at the other with a ground somewhere in the middle? Doesnt make much sense maybe someone can explain it better?

@RubyBandUSA

2 жыл бұрын

@@davenone7312 the cable probably carried electrical current. That's the only explanation.

@neodonkey

10 ай бұрын

@@davenone7312 Sounds like a virtual ground. Consider if you have two 9V batteries connected together to make 18V. If you place 'ground' on the connection between the two batteries, then one end of the battery is -9V, the other is +9V with respect to that virtual ground. So I guess it was something like that?

I wonder if they still use it or how long it lasted before obsolete? And how many times it was cut by accident by trawlers and storms.

@Stringer25

3 жыл бұрын

TAT-1 was in operation from 1956 to 1978. TAT-2 was in operation from 1958 to 1983. The TAT-1 cable was cut once near Oban Scotland in 1956. It was repaired 16 hours later. All of the repeater tubes never failed during its 22 years of operation. The tubes were powered by 4000 volt DC applied from the cable stations at each end.

@shanek6582

3 жыл бұрын

@@Stringer25, did you work on this stuff? Thanks man

@Stringer25

3 жыл бұрын

@@shanek6582 No I didn’t work on the cable. I’m from Clarenville so I did a lot research about the cable history. In fact, the cable runs along my backyard ten miles from the cable station.

I've seen this film somewhere else on youtube. Can't remember where, but it must have been some other channel.

@pedalingthru2719

2 жыл бұрын

And your point is what ?

@andybaldman

2 жыл бұрын

@@pedalingthru2719 The owner of this channel buys stock footage and licenses it to people wanting to use it. If this video exists elsewhere on youtube, that means he doesn't own it.

voices echoed on line

I dunno .. kinda seems like this was a job meant for Admiral Nelson and the crew of the SeaView :D

Something is wrong here. I was a District Inspector for a gas utility in Massachusetts. My job was locating and marking our gas lines. In the late 80s or early 90s a major sewer and drainage project was going on in downtown Lynn. I showed up for a daily update of digging. There was a lot of suite coats at the site. Because of my job i was able to find out who they were. State officials, phone companies both long distance and local providers and other government officials. They were there because the east coast trans Atlantic cable was going to be exposed. In talking, i was told it was first one to America from Canada. They were concerned about how it will be supported or held up and wanted too verify procedure. A rep would be there for the duration and had authority to shutdown work anytime. Lynn mass was the only location that was feasible from Florida to Canadian border. Now Virginia Beach has been added. This line was only direct route to Canada then to Europe. In the late 90s or 2000 the first fiber optic cable came to Lynn. This time I was directly involved in the first couple of miles to its station. From there towards boston i only followed a mile. This telephone communication cable was old so what do you know about the line that comes to Lynn

@Stringer25

3 жыл бұрын

Hibernia Networks or also known as Hibernia Atlantic fibre optic cable was installed in 2001. It runs from Lynn, MA USA to Herring Cove, Nova Scotia, Canada and then onward to Ireland - en.m.wikipedia.org/wiki/Hibernia_Networks

If the rigid type repeaters worked for both directions and they only needed one wire for the 300 miles between Newfoundland and Nova Scotia, I wonder why they used a different type repeater and lay two wires between Nova Scotia and Scotland?

@Ozwoodturner1

3 жыл бұрын

Probably size and weight. The duplex cable is huge compared to the other2.

@Stringer25

3 жыл бұрын

The Cabot Strait between Newfoundland and Nova Scotia is much shallower than the Atlantic Ocean. The newer type of British bidirectional repeater for this cable is much more rigid and fragile. If any one of the repeaters break, it's easier to bring it up to the surface and repair them.

Does anybody know the narrators name?

Originally released in 1956.

@mitchdakelman4470

3 жыл бұрын

Thanks Barry, I thought it was released in 1958. Most of John Sutherland's films were released in Technicolor, but this one is in Eastman Color, so thats why the color isnt the greatest. Periscope has done a great job in doing the color restoration. This film was available for many years through the offices of AT&T.

@fromthesidelines

3 жыл бұрын

You're very welcome. :)

@Stringer25

3 жыл бұрын

@@mitchdakelman4470 Yes, that film narrated by John Sutherland was released in 1958 with the second transatlantic cable TAT-2 landing in Penmarch, France.

@mitchdakelman4470

3 жыл бұрын

@@Stringer25 Jason, the copy of the film on the Periscope KZread channel came from my collection. I have owned that print for about 40 years and its service life is very limited due to fading and warping. Luckily Perisicope made this digital copy and maybe someday I will convert it back to 16mm using the digital copy as the source. I was not aware that John Sutherland was the narrator. I have several of his films. I will need to watch it again. Stay in touch. Dakelmanm@aol.com

@mitchdakelman4470

3 жыл бұрын

@@Stringer25 Whoops Jason, according to the credits is a John Hiestand, or is that another name Mr Sutherland used for the film?

Ok

Shame they didn't have the great Eastern