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Subject: Re: Bubble sextant instructions
From: William Pettyplace (wpettyplace@XXX.XXX)
Date: Thu Dec 13 2001 - 15:03:46 EST
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
>
>MS28011-6
>
>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@XXX.XXX
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