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Wavemeter Decremeter (Military) Type CN 259

Wavemeter Decremeter Type CN 259; National Electric (ID = 1978230) Equipment Wavemeter Decremeter Type CN 259; National Electric (ID = 1978232) Equipment
Wavemeter Decremeter Type CN 259; National Electric (ID = 1978233) Equipment
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Wavemeter Decremeter Type CN 259; National Electric (ID = 1978230) Equipment
National Electric: Wavemeter Decremeter Type CN 259 [Equipment] ID = 1978230 933x395
Select picture or schematic to display from thumbnails on the right and click for download.
For model Wavemeter Decremeter (Military) Type CN 259, National Electric Signaling Co. (NESCO) or Supply; Washington, D.C.
 
Country:  United States of America (USA)
Manufacturer / Brand:  National Electric Signaling Co. (NESCO) or Supply; Washington, D.C.
alternative name
 
National Electric Signaling Co. || National Electrical Supply Co.
Year: 1917 Category: Service- or Lab Equipment
Main principle Crystal or Solid State Detector
Wave bands Broadcast (MW) and Long Wave.
Details
Power type and voltage Dry Batteries / 1.5 Volt
Loudspeaker - For headphones or amp.
Power out
from Radiomuseum.org Model: Wavemeter Decremeter Type CN 259 - National Electric Signaling Co
Material Wooden case
Shape Miscellaneous shapes - described under notes.
Dimensions (WHD) 15.5 x 11 x 9 inch / 394 x 279 x 229 mm
Notes

This is a wavemeter and Kolster decremeter that was used to check and calibrate early wireless spark transmitters. The wavemeter checks the transmitter frequency and the decremeter checks the quality of the transmitted signal. At the time, a spark transmitters decrement (e.g. how rapidly the spark energy dissipates between sparks), was regulated to avoid generating interference with other transmitters. This device was often carried on-board ships by wireless inspectors to test the ships spark transmitters.

Receiving range: 85 to 5,000 meters

Model page created by Richard Groshong. See "Data change" for further contributors.



All listed radios etc. from National Electric Signaling Co. (NESCO) or Supply; Washington, D.C.
Here you find 30 models, 28 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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