Telegraph, control the way to send a message

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SUMMARY

The discussion centers on the operation of telegraph systems as depicted in the series "Hell on Wheels." Participants confirm that messages were sent by selecting the appropriate telegraph cable and using an identifier code for the intended receiving station. The operator at the receiving station would recognize this code and listen for the Morse code message. The conversation highlights the historical use of single wire and Earth return systems in telegraphy.

PREREQUISITES
  • Understanding of telegraph systems and their components
  • Knowledge of Morse code and its application in communication
  • Familiarity with identifier codes used in telegraphy
  • Basic grasp of electrical circuits, particularly single wire and Earth return systems
NEXT STEPS
  • Research the history and evolution of telegraph systems
  • Learn about the technical specifications of Morse code
  • Explore the role of identifier codes in telecommunication
  • Investigate the principles of single wire and Earth return electrical systems
USEFUL FOR

Historians, telecommunications enthusiasts, and anyone interested in the mechanics of early communication technologies.

Charles123
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I was watching “Hell on Wheels” (nice series by the way), and with a train stopped they connected their telegraph terminal to the telegraph cable, and decided to send a message in a particular direction. How was this done? How is the direction for sending the message controlled?
Thank you
Regards
 
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1) They chose the cable that went in that direction ? ... would be the obvious reasoning,
not having seen the series I can't elaborate any further

2) all stations were connected on the common line and sender would send an identifier for the receiving station he wanted to reach...
The operator at that station would recognise his identifier code and start listening to the morse code message coming through.

I would expect it to be one of those 2 methods... maybe some one else on here can offer another suggestion :)

ahhhhh the good ol' days of single wire and Earth return ;)Dave
 
I think it was a single cable, so first option is excluded.
 
Most likely this can only be answered by an "old timer". I am making measurements on an uA709 op amp (metal can). I would like to calculate the frequency rolloff curves (I can measure them). I assume the compensation is via the miller effect. To do the calculations I would need to know the gain of the transistors and the effective resistance seen at the compensation terminals, not including the values I put there. Anyone know those values?

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