[GreenKeys] Telegraph Transmission and Loop Wiring

[Don Robert House]

A good source for all of your telegraph transmission and loop answers  
reside in the AT&T GREEN BOOK.

Principles of Electricity applied to Telephone and Telegraph Work
Long Lines Department, American Telephone and Telegraph Company

There are several editions: 1928, 1938, 1941, 1953, and 1961

You can often get one on eBay or on http://wwww.abebooks.com

Don
K9TTY