[GreenKeys] Tubes

[pdwills at cedarknolltelephone.com]

But does everyone know how they *really* work?

http://www.telephonecollectors.org/repeater/repeater.htm

PDW

----- Original Message Follows -----
From: "Larry Tighe" <larryradio at worldnet.att.net>
To: <greenkeys at mailman.qth.net>
Subject: [GreenKeys] Tubes
Date: Thu, 26 Mar 2009 10:29:36 -0400

> 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 
> 
>