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 Post subject: Still Using Tubes In 2035
PostPosted: Mar Thu 14, 2019 8:04 pm 
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I watched an old Will Smith movie (I, Robot) last night and there's one scene in which I thought I saw a schematic with vacuum tube symbols on it. So I rewound and then forwarded frame by frame and caught it. This movie is set in the year 2035 and this schematic on U.S. Robotics letterhead definitely has tube symbols on it. Tubes are V1, V2 and V3. These are actual tubes.

Image

Of course there is no U.S. Robotics company in 2019. Nothing that I could find Googling. But it's cool to see
Vacuum tubes being used in futuristic robots.

And I apologize for the size of this attachment. I've tried in vain to make it smaller and nothing is working.

Johnny

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 Post subject: Re: Still Using Tubes In 2035
PostPosted: Mar Thu 14, 2019 8:25 pm 
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USRobotics (USR) has been around since the mid 70's and still exists today:
https://www.usr.com/home/
As far as the USR schematic with tube circuits, it's a movie prop (anything goes i.e. put a microphone in front of a receiver and simulate communicating with someone). :lol:

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 Post subject: Re: Still Using Tubes In 2035
PostPosted: Mar Thu 14, 2019 11:01 pm 
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I don’t think they have made much progress making semiconductors that can hold up tp gama rays.


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 Post subject: Re: Still Using Tubes In 2035
PostPosted: Mar Thu 14, 2019 11:51 pm 
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Does the 5514 and 805 have 4 pins each? And does the schematics show 5 pins for the 5514 and 3 connected in the 805s?

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 Post subject: Re: Still Using Tubes In 2035
PostPosted: Mar Fri 15, 2019 12:03 am 
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Maybe there positronic......

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 Post subject: Re: Still Using Tubes In 2035
PostPosted: Mar Fri 15, 2019 1:28 am 
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Looks like the output stage of a transmitter, plate modulated by a push-pull audio amp.

Rob


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 Post subject: Re: Still Using Tubes In 2035
PostPosted: Mar Fri 15, 2019 1:53 am 
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EICOKnight wrote:
Does the 5514 and 805 have 4 pins each? And does the schematics show 5 pins for the 5514 and 3 connected in the 805s?

The 5514 has 4 pins and a plate cap, with two pins connected to the grid.. The 805 has 4 pins and a plate cap with one pin not used.
The filament for the 805 is not shown on the schematic. And the 805 does not have an indirectly heated cathode. Both tube types use the filament for
the cathode.

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 Post subject: Re: Still Using Tubes In 2035
PostPosted: Mar Fri 15, 2019 12:10 pm 
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manualman wrote:
USRobotics (USR) has been around since the mid 70's and still exists today:
https://www.usr.com/home/

From their "About" page:
https://www.usr.com/about/
Quote:
Founded in classic hi-tech start-up fashion in an Illinois garage in 1976, USRobotics was named after “the greatest company in the known galaxy” – U.S. Robot and Mechanical Men – from the science fiction classic I, Robot by Isaac Asimov.

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 Post subject: Re: Still Using Tubes In 2035
PostPosted: Mar Sat 16, 2019 7:01 pm 
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Seem to recall that company's name on a line of dial up modems for consumer applications in the 80s.

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 Post subject: Re: Still Using Tubes In 2035
PostPosted: Mar Sat 16, 2019 8:50 pm 
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My username is to be taken quite literally....so if I'm around in 2035, I'll still be using tubes too :P

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 Post subject: Re: Still Using Tubes In 2035
PostPosted: Mar Sat 16, 2019 9:07 pm 
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Quote:
it's a movie prop (anything goes i.e. put a microphone in front of a receiver and simulate communicating with someone)

Yep, that really frosts me sometimes, they spend all this money producing a movie but don't have anyone to give some technical advice.

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 Post subject: Re: Still Using Tubes In 2035
PostPosted: Mar Sat 16, 2019 10:57 pm 
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The movie is an adaptation of the novel written by Isaac Asimov originally published in 1950, so that might have something to do with it


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 Post subject: Re: Still Using Tubes In 2035
PostPosted: Mar Sat 16, 2019 11:15 pm 
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It's probably for the voice circuit. Gives the robot a warmer sound.

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 Post subject: Re: Still Using Tubes In 2035
PostPosted: Mar Sat 16, 2019 11:59 pm 
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It's a prop. Type 805 tubes do not have cathodes.

Norman

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 Post subject: Re: Still Using Tubes In 2035
PostPosted: Mar Sun 17, 2019 1:50 am 
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Of course they do, they have directly heated cathodes! :D

ducks and hides :wink: :lol:

-Steve

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 Post subject: Re: Still Using Tubes In 2035
PostPosted: Mar Sun 17, 2019 5:45 am 
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Tubes are EMP resistant......


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 Post subject: Re: Still Using Tubes In 2035
PostPosted: Mar Sun 17, 2019 6:07 am 
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made in china wrote:
Tubes are EMP resistant......


Absolutely, which is why the Russian military still uses them in some applications

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