[GreenKeys] RE: What is a polar relay for?

[WA5CAB at cs.com]

Not to be confused with "The Green Books",  aka "U.S. Army In WW-II" which 
ran to some 80 volumes and was partially reprinted at least once.

In a message dated 12/30/2008 11:30:53 PM Central Standard Time, 
k1lky at earthlink.net writes: 
> >I just ordered this book from an Amazon book dealer, cost less than  
> >the shipping for standard delivery at $3.99.
> ... "Principles of Electricity applied to Telephone and Telegraph  
> Work" put out by AT&T
> 
> This is "the Green Book" and tells a LOT about telephone and  
> telegraphs. They sometimes cost much more than $4.  I have a couple  
> different editions, and there are some differences.
> 

Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480
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