See also:
- J-38 Keys - - Descriptions of a common telegraph key used by the U.S. Army Signal Corps.
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- The Sparks Telegraph Key Review - - Informational and photo display site on telegraph keys. Extensive information about instruments used during the spark-era of radio. By Russ Kleinmann, WA5Y.
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- SV1EDY Homepage - - A telegraph instrument collecting site located in Greece by ham radio operator, Apostolos Bourousis, SV1EDT.
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- Telegraph - - A colorful presentation of a wide assortment of telegraph instruments.
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- The Telegraph - - An assortment of telegraph instrument images compiled from several early physics apparatus collections by Professor Thomas Greenslade Jr. of Kenyon College.
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- Telegraph Lore - - Site covers all aspects of Morse telegraphy and telegraph instrument collecting.
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- The Telegraph Office - - A resource for wire and wireless telegraph instrument collectors and historians. Several images of instruments are viewable in the photo galleries.
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- The Vibroplex Collector's Page - - Extensive information about identifying and dating Vibroplex Bugs. (Semi-automatic telegraph keys used by telegraphers and radio operators to send Morse code..
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