[GreenKeys] Re: Principles of Electricity Applied to Telephone & Telegraph Work

[Joe Stevens]

I also have a few editions of this book as well as some Lenkurt 
Demodulator and a nice pamphlet from AE on relays.  I think these are 
very valuable and useful resources and I have made a small bit of it 
available on my site at
http://www.kadiak.org/tel

I have some Hal ST-6s and have been on RTTY since about 1968 but was 
wondering what would be a correct FSK/AFSK demod for the WWII era?
I am familiar with the WeCo 43 carrier and Lenkurt equivalents and I 
maintained URA-8 and similar in a prior lifetime.
We have hands-on Model 14, 15s and 28s at our museum and 5th graders 
as well as adults are very curious about them.  I would like to get 
them on the air again with a period setup.

(Recent discussions are making me think about a simulated single 
conductor submarine cable running duplex too.  We have some cable 
sections of number 10 AWG, stranded, silver plated copper salvaged 
from the ocean bottom here. http://www.kadiak.org/radios/sub_cable.html )

Best to all,

    ...j0e

WL7AML
Kodiak Military History Museum
http://www.kadiak.org
Kodiak Alaska

At 10:14 PM 12/30/2008, you wrote:
>I have all of the editions from 1929 to 1961.
>
>The PDF is just the introduction to the 1953 Edition. Only 10 pages.
>
>The other Bell System Green Book is Engineering Economics.
>Some of you might find the AT&T Red Books interesting as 
>well.  Three volumes of transmission engineering principles.
>
>Don
>K9TTY
>
>
>
>On 30 Dec 2008, at 11:05 PM, amourdutigre wrote:
>
>I just ordered this book from an Amazon book dealer, cost less than 
>the shipping for standard delivery at $3.99.
>
>Joe KB0TXC
>
>An excellent reference for all this stuff is a book "Principles of
>Electricity applied to Telephone and Telegraph Work" put out by AT&T
>in several editions between 1933 and the 1960s.  I see this book is
>available online at
><http://www.pmillett.com/Books/intro_att_principles.pdf>www.pmillett.com/Books/intro_att_principles.pdf
>
>(I found that with google, which turns up a lot of other references
>to the book.)
>
>
>
>jhhaynes at earthlink dot net
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