NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Bubble sextant instructions
From: Craig Scott
Date: 2001 Dec 13, 1:06 PM
From: Craig Scott
Date: 2001 Dec 13, 1:06 PM
Will a bulb from a mini-maglite fit? Craig -----Original Message----- From Navigation Mailing List [mailto:NAVIGATION-L@LISTSERV.WEBKAHUNA.COM]On Behalf Of William Pettyplace Sent: Thursday, December 13, 2001 15:04 To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM Subject: Re: [NAV-L] Bubble sextant instructions 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@noaa.gov -or- wpettyplace@awc.kc.noaa.gov ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^