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EM 800 "Magic Eye" tubes

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  • EM 800 "Magic Eye" tubes

    What can y'all tell me about these things? Or other types of "Magic Eye" tubes? I found tidbits of info on a couple other sites. It looks like the EM 800 is a 9-pin mini with one normal triode and another triode that does the display-part. Could I use this as part of a preamp? Does it fit a "standard" (for guitar amps) 9-pin socket? Any ideas where to buy these? They just look insanely cool!
    Thanx!
    Ace!8-)>
    Ace Pepper Custom Amps

  • #2
    Check out some of this info.
    http://www.vacuumtube.com/eyetubes.htm

    Here's Steve Bench's site. Search for eye when you go there.
    http://members.aol.com/sbench101/

    Here's a level indicator made out of one
    http://www.audiohobbyist.com/projects/magiceye.htm

    You could use the triode as a gain stage, and drive the target at the same time I suppose. I have always wanted to try it, but all the eye tubes I have are the round type, and they're not as dramatic looking when they swing.
    Sometimes I'm good, then I'm bad..
    http://www.evacuatedelectronics.com

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    • #3
      The Trace Elliot V8 Bass amp has one of those for a VU meter.

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      • #4
        Thanx for the info! Especially the level meter, just what I was thinking of! Any more links/info would be great. How much signal do you suppose it takes to drive one of these things? Would you feed it a preamp-level signal or would you take it from the output, or maybe from the bias? Any old hi-fi schems that might illustrate how they're used?
        Thanx!
        Ace!8-)>
        Ace Pepper Custom Amps

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