[GreenKeys] Tubes

[Larry Tighe]

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