Editing Relay league

{{single source|date=June 2019}}
A '''relay league''' is a chain of message forwarding stations in a system of [[optical telegraph]]s, [[Telegraphy#Radiotelegraphy|radio telegraph]] stations, or riding [[courier#History|courier]]s. Early 19th century methods of this type evolved into the [[electrical telegraph]] networks of the mid-to-late 19th century.<ref>{{cite book |last1       = Standage
 |first1      = Tom
 |authorlink1 = Tom Standage
 |date        = 1999
 |title       = The Victorian Internet
 |publisher   = [[Berkley Books]]
 |isbn        = 0-425-17169-8
 |quote       = 
 |url-access  = registration
 |url         = https://archive.org/details/victorianinterne00toms
}}</ref>

== Radio relay leagues ==
[[Amateur radio|Radio amateur]]s have been early in arranging relay leagues, as is reflected in the name of the organization of [[American Radio Relay League]] (ARRL).

Radio amateur message relay operations were originally conducted in the first two decades of the 20th century using [[Morse code]] via [[spark-gap transmitter]]s. As [[vacuum tube]]s became affordable, operations shifted to more efficient manual telegraphy transmitters, referred to as ''CW'' ([[Continuous wave]]). Messages were relayed station-to-station, typically involving four or more re-transmission cycles to cover the continental [[United States]], in an organized system of amateur radio networks. After [[World War II]], voice and [[radioteletype]] implementations of the message relay system were employed.

== See also ==
* [[Post rider]]
* [[Pony Express]]
* [[Relay (disambiguation)]]

== References ==
{{Reflist}}

{{DEFAULTSORT:Relay League}}
[[Category:History of telecommunications]]
[[Category:Telegraphy]]