Re: [TCML] unknown tube...

["Brian Foley" <ka1bbg@xxxxxxxxxxx>]

Hi, short arc lamps operate under great pressure from 200 to 500 atmospheres
of pressure...a fingerprint on the envelope will cause them to explode in
seconds once lit up....halogen bulbs i dont think there is much vacuum, but
fingerprints cause them to destroy the envelope quickly.....usually made of
quartz...cul brian f.


      www.genapro.com
----- Original Message -----
From: "Ed Phillips" <evp@xxxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Saturday, February 09, 2008 10:27 PM
Subject: Re: [TCML] unknown tube...


> Hello coilers,
>
> I know it is true that one shalt not touch the glass of a halogen bulb or
> the vacuum will be compromised by the oils in the skin. Is this true in
> general of vacuum tubes?
>
> Jim Mora"
>
> No and I don't think that's the reason for not touching the envelope of
those light bulbs.  The explanation I've heard is that any fingerprints or
the like can carbonize and cause local heating which is injurious.  I don't
think those things operate under high vacuum conditions anyway.  Anyone
know?
>
> Ed
>
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