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Description
One of two loading/tuning coils for a radio transmitter, from a reproduction of Charles "Doc" Herrold's San Jose radio station. Control room operators Ken Sanders and Emil Portal broadcast to West Coast listeners using a water-cooled microphone and windup phonograph. This may be original to Herrold's station FN. Originally described on Foothill Electronics Museum accession record as follows: "Large assembly consisting of two conically wound coils of copper ribbon. The coupling between them was by moving the upper one up and down a wooden shaft through the middle. Collars with thumb screws kept the separation fixed. Three wooden legs into brackets around the lower coil suspended the aassembly from the floor. Probably not a tuning coil, but purely a coupling coil. Probably used in a transmitter as early as 1905."
Type
image
Identifier
09732D33-EAF5-458C-8330-285646024050 2003-1-783
Subject
KQW (Radio station: San Jose, Calif.) Radio stations (LCSH) Radio broadcasting (LCSH) Nineteen tens (LCSH) Herrold, Charles
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