Bob,
It's probably a "carbon" filament, not "carbide".
Carbon was replaced with tungsten because:
1. you get more light per watt from tungsten, important if you're
running from battery power.
2. it's a much whiter light and more desirable for most people
3. I don't think that carbon handles shocks all that well compared to
tungsten, something that's important in a TT.
<<Jim>>
Bob Kiger wrote:
>
> All of us who own vintage Airstreams can be pleased at the quality of
> the
> metal, the fixtures and even the aluminum LP tanks. The things that
> have
> not weathered time as well are the plastic lighting covers and to a
> lesser
> degree the Univolt and electrical.
> I was pleasantly surprised this AM by a news report on CNN of a 100
> year
> old light bulb (4 watts) that has been burning continuously in a Fire
> Station in Livermore,
> California. It was hand blown and has a carbide filament. Anyone know
> why
> this technology went bye bye. With that kind of longevity I'm
> wondering
> why we don't have carbide filaments in our vintage coaches? :)
> Bob
>
> Photos of new 1966 Ford F-250 Camper Special puller coming soon.
>
> http://mrminimal.com
>
> 1966 Airstream "Safari" WBCCI #2857
> 1966 Ford F-250 "Camper Special"
> Mira Mar Mobile Community
> Oceanside, California
--
<<http://www.oldengine.org/members/jdunmyer>>
<<[EMAIL PROTECTED]>>
<<lower SE Michigan, USA>>
<<mailto:[EMAIL PROTECTED]>>
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