[GreenKeys] Tubes

[Michael O'Day]

I always liked those early "How They Are Made" movies in school. It was interesting to note, in the first video, that during assembly, that the header skirts were welded to the metal tubes with "50,000 ampers". Must be some welder, ours here run at 110/15A or 220/30A.

Mike
N9ODM

--- On Thu, 3/26/09, Larry Tighe <larryradio at worldnet.att.net> wrote:
From: Larry Tighe <larryradio at worldnet.att.net>
Subject: [GreenKeys] Tubes
To: greenkeys at mailman.qth.net
Date: Thursday, March 26, 2009, 9:29 AM

My son just sent this to me "How Tubes Are Made".

http://i.gizmodo.com/5183966/how-vaccuum-tubes-are-made-and-used-explained-in-1942


 I brought home my NC-300 receiver from a friend who borrowed it over 30 
years ago and turned it on.  My son, the family nerd, wanted to know what 
all those things are inside that are lighting up! ! !

There's hope:  he and my grandkids are getting very curious about all those

machines in the shack that print on long sheets of paper  LOL.  They will 
probably be spared from the junkyard when I'm sent there! ! !

lar
Larry
K2JIA
www.antiquetelephone.com 

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