[GreenKeys] more for your reading pleasure

[Nick England]

I have added what appears to be an AT&T training document on "Telegraph
Transmission". (Remember - "telegraph" in Bell-speak includes "teletype".)
This discusses bias in both Neutral and Polar circuits.
https://www.navy-radio.com/manuals/tty/training--transmission.pdf

More training documents are located at
https://www.navy-radio.com/manuals-ttycorp.htm#training

Cheers,
Nick England K4NYW
www.navy-radio.com
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