Model: Gold Grain Detector
Antique radios, Old Time Radios
Gold Grain Detector
Country:
United States of America (USA)
Manufacturer/Brand:
National Airphone Corp.; New York (NY)
Year: 1922
Type:
Wireless modul post 1920 (not a component)
Mod.-ID = 130027
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Model: Gold Grain Detector
Dimensions (WHD)
2.4 x 1.2 x 1.5 inch / 61 x 30 x 38 mm
Notes
Sealed detector element on a little board with 2 binding posts. Contact with the crystal by hundreds of loose grains of pure gold. Price in 1922 $2.50, in 1923 $1.50. Also available without stand for panel mounting, price $1.00.
Price in first year of sale
2
USD
Source of data
Crystal Clear; Sievers Vol.1CRYSTAL CLEAR (Vol.1)Vintage American Crystal Sets, Crystal Detectors, and Crystalsby Maurice L.Sievers,1991 282 pages, hundreds of b/w photos, ads, and illustrations, comprehensive listings. Covers history, Models, Trade Names, Manufacturers,components, and more. A standard reference book on American Crystal Sets and related subjects. First printing 1991 by Vestal Press, ISBN 0-911572-86-4later printing 1995 by Sonoran Publishing, ISBN 1-886606-01-3
Mentioned in
Crystal Clear; Sievers Vol.2CRYSTAL CLEAR, Vol.2Vintage American Crystal Sets, Crystal Detectors, and Crystalsby Maurice L.Sievers,1995 244 pages, hundreds of b/w photos, ads, and illustrations, comprehensive listings as in Vol.1. Master Index for Vol.1+2. Indispensable supplement to Vol.1. First printing1995 by Sonoran Publishing, ISBN 1-886607-03-x
(Radio News 11/1922)
This model was suggested by Otto Frosinn.
By courtesy of K. Birkner
By courtesy of K. Birkner
No further information
on
Gold Grain Detector (National Airphone Corp.; New York (NY))
