720A ; Shure; Chicago, (ID = 475114) Microphone/PU
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720A ; Shure; Chicago, (ID = 475114) Microphone/PU
Shure; Chicago,: 720A [Microphone/PU] ID = 475114 335x700
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For model 720A, Shure; Chicago, Evanston, Niles (IL)
Country:  United States of America (USA)
Manufacturer / Brand:  Shure; Chicago, Evanston, Niles (IL)
Year: 1938 ?? Category: Microphone or Pick-up element
Wave bands - without
Power type and voltage No Power needed
Power out
from Model: 720A - Shure; Chicago, Evanston,
Material Various materials
Notes Crystal microphone. Uni-, bi- or non-directional avaiable through a selector switch.
Price in first year of sale 39.00 $
Mentioned in The radio amateur's handbook 1938, cat. sec. p. 515

Model page created by Otto Frosinn. See "Data change" for further contributors.

All listed radios etc. from Shure; Chicago, Evanston, Niles (IL)
Here you find 122 models, 116 with images and 44 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.