[NJARC] Tube manufacturing videos

[Aaron Hunter]

Appeared in Electrola newsgroup

Electrola at yahoogroups.com wrote:
> Collectible electronic phonographs. 
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>   Messages In This Digest (2 Messages)
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> 1a.
>     Mullard  and Osram tube manufacture <#1a> From: Greg Bogantz 
> 1b.
>     Re: Mullard  and Osram tube manufacture <#1b> From: Jim Nichol 
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> 1a.
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>         Mullard  and Osram tube manufacture
>         <http://groups.yahoo.com/group/Electrola/message/2804;_ylc=X3oDMTJxYWw2NDRoBF9TAzk3MzU5NzE1BGdycElkAzE4MTk3OTUEZ3Jwc3BJZAMxNzA1MDYyMjgyBG1zZ0lkAzI4MDQEc2VjA2Rtc2cEc2xrA3Ztc2cEc3RpbWUDMTMyMjQ3Nzk0Mw-->
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>           Posted by: "Greg Bogantz" gbogantz1 at charter.net
>           <mailto:gbogantz1 at charter.net?Subject=%20Re%3A%20Mullard%20%20and%20Osram%20tube%20manufacture>
>             gregbogantz <http://profiles.yahoo.com/gregbogantz>
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>             Sun Nov 27, 2011 3:30 pm (PST)
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>     This is purty neat - a set of three videos that detail the
>     manufacture of vacuum tubes at the Mullard plant in England. They
>     are showing the build of a miniature type tube EF80 which would
>     date this to the early 1950s - I think I can make out a date of
>     1949 from some of the text. Part 1 shows the details of the
>     components of the tube and a special hand assembly of the parts to
>     show the operations better.
>
>     http://www.youtube.com/watch?NR=1&v=VV7cimRWah0
>     <http://www.youtube.com/watch?NR=1&v=VV7cimRWah0>
>
>     Part 2 is really interesting as it details the manufacture of
>     tungsten wire that goes into the filament. I had wondered how
>     tungsten wire was made as it is so damn hard that ordinary wire
>     drawing techniques can't be used. I became aware of the
>     crystalline structure of the wire when trying to cut and use it
>     for phonograph needles. Now I know why that is:
>
>     http://www.youtube.com/watch?v=OgycwCeUwp8
>     <http://www.youtube.com/watch?v=OgycwCeUwp8>
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>     Part 3 shows the automation in tube assembly. Look at all those
>     machines AND all that labor! These were really sophisiticated
>     assembly lines of 60 years ago. Lots of capital-intensive tooling
>     involved. Hard to believe that each one of those welded
>     connections between the structure and the base wires was done by
>     hand. Maybe it became more automated in later years:
>
>     http://www.youtube.com/watch?NR=1&v=N9NcHDETmJw
>     <http://www.youtube.com/watch?NR=1&v=N9NcHDETmJw>
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>     There is also an earlier set of films dating from the 1930s, but
>     they are silent and there isn't much textual description of what's
>     going on. Still, they are interesting to watch. This is from the
>     G.E.C. Osram works. Here's part 1:
>
>     http://www.youtube.com/watch?v=pnCYefwyd8U&feature=related
>     <http://www.youtube.com/watch?v=pnCYefwyd8U&feature=related>
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>     Part 2: A good bit of automation was necessary to ensure
>     uniformity of the product even these 80 years ago:
>
>     http://www.youtube.com/watch?v=GbsObrKT3ms&feature=related
>     <http://www.youtube.com/watch?v=GbsObrKT3ms&feature=related>
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>     Part 3: Note the indelicate handling of the cartoned products.
>     They might even survive today's drop-kicking on the part of our
>     UPS and USPS handlers:
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>     http://www.youtube.com/watch?v=VLSZkUp2gTs
>     <http://www.youtube.com/watch?v=VLSZkUp2gTs>
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>     Greg Bogantz
>
>     [Non-text portions of this message have been removed]
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>     Back to top <#toc>
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>     <mailto:Electrola at yahoogroups.com?Subject=%20Re%3A%20Mullard%20%20and%20Osram%20tube%20manufacture>
>