Code Practice Oscillator CPO
National Company; Cambridge & Malden (MA)
- Country
- United States of America (USA)
- Manufacturer / Brand
- National Company; Cambridge & Malden (MA)
- Year
- 1934
- Category
- Amateur Equipment (Other, but not Key)
- Radiomuseum.org ID
- 285752
-
- alternative name: National Toy Co.
- Brand: Thrillbox
- Number of Tubes
- 1
- Valves / Tubes
- 30
- Wave bands
- - without
- Power type and voltage
- Dry Batteries
- Loudspeaker
- - For headphones or amp.
- Material
- Metal case, TUBES VISIBLE
- from Radiomuseum.org
- Model: Code Practice Oscillator CPO - National Company; Cambridge &
- Shape
- Tablemodel, with any shape - general.
- Notes
-
The National CPO Code Practice Oscillator is a small audio oscillator suitable for either code practice or as an ICW modulator. It has tip jacks for headphones, an on-off switch and terminals for the key. It uses four flashlight batteries.
- Price in first year of sale
- 6.00 USD
- Mentioned in
- QST (February 1934 page 82)
- Literature/Schematics (1)
- Allied Catalog 1935 page 95
- Author
- Model page created by Wayne Childress. See "Data change" for further contributors.
- Other Models
-
Here you find 446 models, 285 with images and 189 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from National Company; Cambridge & Malden (MA)