- Country
- United States of America (USA)
- Manufacturer / Brand
- National Company; Cambridge & Malden (MA)
- Year
- 1934–1938
- Category
- Service- or Lab Equipment
- Radiomuseum.org ID
- 108941
-
- alternative name: National Toy Co.
- Brand: Thrillbox
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 2
- Wave bands
- - without
- Power type and voltage
- Alternating Current supply (AC)
- Loudspeaker
- - - No sound reproduction output.
- Material
- Metal case
- from Radiomuseum.org
- Model: CRO - National Company; Cambridge &
- Shape
- Tablemodel, with any shape - general.
- Dimensions (WHD)
- 6 x 8 x 18 inch / 152 x 203 x 457 mm
- Notes
-
The National CRO is an 3-inch oscilloscope for monitoring amatuer transmissions, such as percent modulation, signal distortion and peak voltages.
- Price in first year of sale
- 29.50 USD
- Source of data
- -- Original prospect or advert
- Mentioned in
- QST (April 1934 pages 27-30, 80)
- Literature/Schematics (1)
- National Company Catalog No.240 (1934)
- Author
- Model page created by Otto Frosinn. See "Data change" for further contributors.
- Other Models
-
Here you find 445 models, 284 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)