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Crystal Microphone 70S

Crystal Microphone 70S; Shure; Chicago, (ID = 2055596) Microphone/PU Crystal Microphone 70S; Shure; Chicago, (ID = 2055597) Microphone/PU
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Crystal Microphone 70S; Shure; Chicago, (ID = 2055596) Microphone/PU
Shure; Chicago,: Crystal Microphone 70S [Microphone/PU] ID = 2055596 943x2100
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For model Crystal Microphone 70S, Shure; Chicago, Evanston, Niles (IL):
QST October 1935 page 96
Country:  United States of America (USA)
Manufacturer / Brand:  Shure; Chicago, Evanston, Niles (IL)
Year: 1935 Category: Microphone or Pick-up element
Wave bands - without
Power type and voltage No Power needed
Loudspeaker - - No sound reproduction output.
Power out
from Model: Crystal Microphone 70S - Shure; Chicago, Evanston,
Material Metal case
Shape Miscellaneous shapes - described under notes.

The Shure 70S Crystal Microphone was advertised as a "Communications-Type" microphone for amateurs.

Price in first year of sale 25.00 USD
Mentioned in QST (October 1935 page 96)

Model page created by Wayne Childress. 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 43 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.