Date: Tue, 18 May 1999 14:44:29 -0400

Author: Gerald Zani

Subject: Fwd: Re: Large neon lamps

Post:

>From: dimarco@physics.montana.edu (Jerry DiMarco)
>
> When I read the description on these bulbs, they sounded vaguely
>familiar. So I check my stock of light bulbs and found not only the neon
>bulb (NE-34) but also it's companion filled with argon (AR-1) that glows
>violet. Decided to pursue this one since I finally found a use for them
>(thanks, Brett, you solved another mystery for me). My predecessor thought
>the bulbs were used in a lab at one time but couldn't say for what.
>
> Needless to say GE no longer makes them. But they gave me three
>sources to check and fortunately one knew what I was talking about! That
>was Sun Ray Lighting in CA at 800-854-4487. They said:
>
>* the AR-1 was changed to W-1A, no longer made, 2 in stock at $8.75@,
>
>* the NE-34 was changed to R-2A, still being made, 600 in stock at $8.51@.
>
>Hope this is what you are looking for...
>
> Jerry
>
>
>At 10:00 AM 10/23/97 -0700, you wrote:
>>
>>Tapsters -
>>
>>We've run out of our supply of large neon lamps, and I can't locate
>>replacements. Anyone know of a source for a bulb that looks like the
>>following?
>>
>>It's about the size of a refrigerator lamp, with a regular 110V screw in
>>socket like a standard light bulb. Inside are two "half-moons", set next
>>to each other so that it looks like a disc split down the middle, about
>>3/4" in diameter - those are the electrodes.
>>
>>When you apply a voltage in one direction, one of the half-moons lights.
>>Reverse the voltage, and the other half-moon lights. Tha's what makes
>>them valuable to us - they can show voltage polarity for demonstrating
>>back EMF from an inductor, etc. The newer ones with the coil of wire
>>wrapped around a central core won't do that. Anybody know of a source for
>>these (old) beauties?
>>
>>Brett
>>
>>********************************************************************
>>Brett Carroll
>>Director of Lecture Demonstrations
>>University of Washington, Department of Physics
>>brett@phys.washington.edu
>>206-543-2899 (voice)
>>206-685-0635 (fax)
>>********************************************************************
>
><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
>
> Jerry DiMarco, Instructional Lab Supr. ph: 406-994-6161
> Physics Dept., Montana State Univ. fax: 406-994-4452
> Bozeman, MT 59717-3840 e-mail: dimarco@physics.montana.edu
>

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