Gold Grain Detector
National Airphone Corp.; New York (NY)
- Country
- United States of America (USA)
- Manufacturer / Brand
- National Airphone Corp.; New York (NY)
- Year
- 1922/1923
- Category
- Radio module post 1925 (not a part, not a key)
- Radiomuseum.org ID
- 130027
By courtesy of K. Birkner
By courtesy of K. Birkner
- Main principle
- Crystal or Solid State Detector
- Wave bands
- - without
- Power type and voltage
- No Power needed
- Loudspeaker
- - - No sound reproduction output.
- Material
- Various materials
- from Radiomuseum.org
- Model: Gold Grain Detector - National Airphone Corp.; New
- 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
- 2.00 $
- Source of data
- Crystal Clear (Volume 1)
- Mentioned in
- Crystal Clear Volume 2 (Radio News 11/1922)
- Literature/Schematics (4)
- October 1923 The Radio News magazine advertisement page 369
- Author
- Model page created by Otto Frosinn. See "Data change" for further contributors.
- Other Models
-
Here you find 15 models, 13 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from National Airphone Corp.; New York (NY)