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Tektronix 7L12 mixer repair

Discussion in 'Electronic Equipment' started by Joerg, Nov 15, 2007.

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  1. Joerg

    Joerg Guest


    Someone sells a 7L12, would be nice to have in the lab because it
    doesn't occupy added space (there is a big Tek 7000 anyhow). Problem:
    Low sensitivity which most likely means the mixer is fried. Since there
    are no schematics or anything on the web: Is it easy to replace the
    diodes in that first mixer or is this going to be a real pain in the neck?

    AFAIR it's one of those 119-0673-00 hybrid but not sure. Heck. it's been
    a long time since I've seen one.
  2. tekamn

    tekamn Guest

    AFAIR it's similar to the 7L13 mixer/7L14 mixer. Is there anything
    helpful at bama manuals site?

    Diodes can be replaced, I would nat say it is too hard to do. At least
    in the dozen repairs I did by myself. Well, YMMV.

  3. Joerg

    Joerg Guest

    Unfortunately nada, same on bitsavers :-(

    Changing diodes would be fine. I've heard its an encapsulated hybrid but
    it seems it ain't then.
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