Højohmsmodstand Potentiometer Carbon powder
Bang & Olufsen (B&O); Struer
- Country
- Denmark
- Manufacturer / Brand
- Bang & Olufsen (B&O); Struer
- Year
- 1929–1937 ?
- Category
- Radio part (not a module)
- Radiomuseum.org ID
- 274268
-
- Brand: B&O
- Wave bands
- - without
- Power type and voltage
- No Power needed
- Loudspeaker
- - - No sound reproduction output.
- Material
- Metal case
- from Radiomuseum.org
- Model: Højohmsmodstand Potentiometer [Carbon powder] - Bang & Olufsen B&O; Struer
- Shape
- Miscellaneous shapes - described under notes.
- Dimensions (WHD)
- 33 x 33 x 19 mm / 1.3 x 1.3 x 0.7 inch
- Notes
-
High resistivity potentiometer.
The variation of resistivity is based on the compression of carbon powder inside the metal box, similar to the functioning of a carbon microphone.
Variable resistor based on the principle of carbon powder compression. A strong metal case (steel, brass) is filled with carbon powder and a piston is forced against the powder by turning a threaded screw. One contact is given by the metal case while the other contact is a smaller, from the case insulated, metal plate opposite to the piston and in contact with the carbon powder. A feed through is provided by a screw for electrical connection. The resistance range, depending on pressure, is typically from 5 kΩ to 1 MΩ.
- Net weight (2.2 lb = 1 kg)
- 0.037 kg / 0 lb 1.3 oz (0.081 lb)
- Price in first year of sale
- 3.50 Kr
- Mentioned in
- Jan Thogersen - The Bang and Olufsen Collection 1925 -1949 )
- Literature/Schematics (1)
- - - Manufacturers Literature (Advert. 1929)
- Author
- Model page created by Albert Walenta. See "Data change" for further contributors.
- Other Models
-
Here you find 479 models, 428 with images and 265 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Bang & Olufsen (B&O); Struer
Collections
The model Højohmsmodstand is part of the collections of the following members.