Tube Maker

george daniel
george daniel Posts: 12,096
edited January 2008 in Electronics
Kinda long video,guy makes tubes.


http://dailymotion.alice.it/video/x3wrzo_fabrication-dune-lampe-triode_tech
JC approves....he told me so. (F-1 nut)
Post edited by george daniel on
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  • Early B.
    Early B. Posts: 7,900
    edited January 2008
    I must be a geek. I watched the whole thing.

    This video helps you understand the failure rate of tubes. I've read that all tubes are at least partially hand-made and the rejection rate at the factory is as high as 50%.

    I also got a sense of why some of the larger tubes cost so much. Geez.
    HT/2-channel Rig: Sony 50” LCD TV; Toshiba HD-A2 DVD player; Emotiva LMC-1 pre/pro; Rogue Audio M-120 monoblocks (modded); Placette RVC; Emotiva LPA-1 amp; Bada HD-22 tube CDP (modded); VMPS Tower II SE (fronts); DIY Clearwave Dynamic 4CC (center); Wharfedale Opus Tri-Surrounds (rear); and VMPS 215 sub

    "God grooves with tubes."
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  • shadowofnight
    shadowofnight Posts: 2,735
    edited January 2008
    Nice video...surprised he touches the bare porous metal with his greasy bare fingers ? No mater how much he heats/trys to clean that metal before placing it in the vacuum atmosphere ...when the metal heats up under vacuum it is going to outgas and cause problems for the finished tube.

    You would have to glass bead blast and do an ultrsonic chemical clean to get the finger oils out/off before placing the metal in the vacuum enviroment like that. No wonder being hand made and having failure rates so high go hand in hand .

    Look up outgassing in a vacuum...some pretty good reading for "geeks" that made it through the whole video :) Our hot cathode ionization guages at work are built pretty close to audio type tubes ( http://en.wikipedia.org/wiki/Hot_filament_ionization_gauge ) ...fun stuff.
    The first rule of Fight Club is you don't talk about Fight Club
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  • Early B.
    Early B. Posts: 7,900
    edited January 2008
    shadowofnight wrote: »
    Look up outgassing in a vacuum...some pretty good reading for "geeks" that made it through the whole video :) Our hot cathode ionization guages at work are built pretty close to audio type tubes ( http://en.wikipedia.org/wiki/Hot_filament_ionization_gauge ) ...fun stuff.

    Well, maybe I'm not such a geek after all.:p
    HT/2-channel Rig: Sony 50” LCD TV; Toshiba HD-A2 DVD player; Emotiva LMC-1 pre/pro; Rogue Audio M-120 monoblocks (modded); Placette RVC; Emotiva LPA-1 amp; Bada HD-22 tube CDP (modded); VMPS Tower II SE (fronts); DIY Clearwave Dynamic 4CC (center); Wharfedale Opus Tri-Surrounds (rear); and VMPS 215 sub

    "God grooves with tubes."
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  • zingo
    zingo Posts: 11,258
    edited January 2008
    Awesome video. Thanks, I always like to learn nerdy stuff.
    Jake
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  • hearingimpared
    hearingimpared Posts: 21,136
    edited January 2008
    I too watched the whole video. It had me captivated. I wish it was in English.
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  • sucks2beme
    sucks2beme Posts: 5,674
    edited January 2008
    There's some real hack procedures there. I worked in manufacturing
    automation many decades ago, and most of that is very crude.
    The problem is, tube making is done is cheap labor areas of the world, and
    investing in equipment doesn't make sense when people are so cheap.
    The consistency of the tube quality goes all over the place when done
    like that. This is why modern tubes don't compare with NOS.
    But then again, what do I know?:D
    "The legitimate powers of government extend to such acts only as are injurious to others. But it does me no injury for my neighbour to say there are twenty gods, or no god. It neither picks my pocket nor breaks my leg." --Thomas Jefferson
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  • madmax
    madmax Posts: 12,434
    edited January 2008
    Awesome! Was that Jesse?
    madmax
    Vinyl, the final frontier...

    Avantgarde horns, 300b tubes, thats the kinda crap I want... :D
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