[Milsurplus] Re metal tubes

[Mike Feher]

Interesting, I will have to try that. All my previous experience has been
that the inside of the metal shell is lined with glass, and, it is what
gives it its hermetic seal. Most metal tubes also just have 4 tabs on the
bottom part to attach them to the base, hardly enough to seal them. 73 -
Mike


Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960



-----Original Message-----
From: milsurplus-bounces at mailman.qth.net
[mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Al Klase
Sent: Thursday, February 18, 2010 10:06 AM
To: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] Re metal tubes

On 2/17/2010 8:34 PM, jcoward5452 at aol.com wrote:
> As you all know,inside that metal tube is a glass tube.The metal is for RF
and Noise shielding...........
>    
Actually, that's not the case, except for some non-RCA products that 
were leveraging existing technology or ducking patent issues.  Just take 
a hack saw to an RCA metal tube, and you'll see what I mean.  The only 
glass is in the seals where the wires exit the tube.

Al

-- 
Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/