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[AMPS] Making tubes

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Subject: [AMPS] Making tubes
From: (Phil (VA3UX))
Date: Thu, 05 Jul 2001 13:08:59 -0400
At 11:06 AM 7/5/2001 -0700, Billy Ward wrote:

>Greetings Group,
>I will ask this question at the chance of being made to look ignorant!
>With the high price of tubes, I wonder if anyone has ever invisioned a 
>homebrew project to actually make the tube from scratch?  I know that it 
>would be a little more than the average ham is used to working with but 
>why could we not use something such as stainless steel tubing and come up 
>with a decent power transmitting tube.  After all, someone once did that!

Virtually impractical to do in a home setting Billy. Not impossible, but 
largely impractical.  The cleaniness requirements are high and the 
equipment needed to produce a hard vacuum is expensive. And then there's 
the unique materials required, etc, etc.


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