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    Re: Bubble sextant instructions
    From: Wm Pettyplace
    Date: 2001 Dec 13, 1:04 PM

    You may be describing what is known as a "wheat bulb", because it is the
    size of a grain of wheat.  Old technology, been around since WWII, after
    that they were used very heavily in the old electric trains.  You may find
    the bulbs in the older hobby shops, or electric train sources.
    Bill Pettyplace
    At 01:02 PM 12/13/01 -0500, you wrote:
    >I looked at the bulbs in a clockwork-averaging sextant I have here. They
    >are fairly small, but have bases with room for an led to be
    >soldered on if one broke the bulb first to get at the wires.
    >This sextant is labeled
    >Sextant, Aircraft, Periscopic
    >28 volts A-C or D-C
    >Specification MIL-S-5807C
    >.....Etc etc etc....
    >The maker is Kollsman Instrument Corporation
    >On Thu, 13 Dec 2001 06:50:30 -0600, Brian Whatcott wrote:
    > >
    > >
    > >It seems unlikely, but I can recall light bulbs smaller than any LED that I
    > >recall.
    > >Even a 'naked' led uses stamped electrodes bigger than the fine wires on
    > >some incandescents.
    > >Still, I haven't seen it all, for sure, and the led has to be a better
    > >choice, if you can find the right one!
    > >
    >Rodney Myrvaagnes                   J36 Gjo/a
    >Contributing Editor           Electronic Products
    >Is a Double-chocolate Semifreddo the moral equivalent of a Chocolate Freddo?
    >Isn't having a smoking section in a restaurant like having a peeing
    >section in a swimming pool?
    Bill Pettyplace                       NWS, Aviation Weather Center
    816-584-7252 Office voice             7220 NW 101st Terrace, Rm 101
    816-880-0650 Office FAX               Kansas City, MO  64153-2371
    816-582-1763 Cell w/voice mail
    888-934-1241 Pager (Numeric only)
    William.Pettyplace@noaa.gov    -or-   wpettyplace@awc.kc.noaa.gov

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