Kolster Decremeter Type D
Firth, John & Co. (Firco); New York, (NY)
- Country
- United States of America (USA)
- Manufacturer / Brand
- Firth, John & Co. (Firco); New York, (NY)
- Year
- 1914 ?
- Category
- Service- or Lab Equipment
- Radiomuseum.org ID
- 361925
- Main principle
- Crystal or Solid State Detector
- Wave bands
- Wave Bands given in the notes.
- Power type and voltage
- Dry Batteries
- Loudspeaker
- - For headphones or amp.
- Material
- Leather / canvas / plastic - over other material
- from Radiomuseum.org
- Model: Kolster Decremeter Type D - Firth, John & Co. Firco; New
- Shape
- Portable set > 8 inch (also usable without mains)
- Notes
-
The decremeter was developed by Frederick Kolster between 1912 and 1914. The device measures the rate of decay or decrement of wireless transmission waves. Ship inspectors could use a portable version of the device to measure the rate of decay on their ships as part of the new regulations on maritime wireless communications put in place after the sinking of the Titanic.
4 coils, for 75 to 3000 meters.
- Author
- Model page created by Gottfried Silberhorn. See "Data change" for further contributors.
- Other Models
-
Here you find 24 models, 22 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Firth, John & Co. (Firco); New York, (NY)