SCR-211-B Frequency Meter Set (BC-221-B)
Cardwell Mfg. Corp., The Allen D.: Brooklyn, NY
- Country
- United States of America (USA)
- Manufacturer / Brand
- Cardwell Mfg. Corp., The Allen D.: Brooklyn, NY
- Year
- 1941 ??
- Category
- Service- or Lab Equipment
- Radiomuseum.org ID
- 142669
From Technical Manual TM 11-300
From Technical Manual TM 11-300
From Technical Manual TM 11-300
From Technical Manual TM 11-300
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 3
- Wave bands
- Wave Bands given in the notes.
- Power type and voltage
- Dry Batteries / 135/6 Volt
- Loudspeaker
- - only for Earphone!
- Material
- Metal case
- from Radiomuseum.org
- Model: SCR-211-B Frequency Meter Set - Cardwell Mfg. Corp., The Allen
- Shape
- Portable set > 8 inch (also usable without mains)
- Dimensions (WHD)
- 10 x 13.7 x 9.25 inch / 254 x 348 x 235 mm
- Notes
- Precision heterodyne frequency meter designed to measure or radiate radio-frequency impulses between 125 kHz and 20 MHz. Portable, self-contained, used mainly to calibrate field radio receivers and transmitters by direct comparison with the crystal-calibrated variable frequency oscillator of the instrument. Frequency readings provided by a calibration book. Contained 1 MHz crystal oscillator and variable frequency oscillator operating in two switched ranges: 125 to 250 kHz and 2 to 4 MHz. The 2nd, 4th and 8th harmonics of the low-frequency range were used to cover 250 kHz to 2 MHz, while the 2nd, 4th and 5th harmonics of the high-frequency range were used to cover 4 MHz to 20 MHz. Supplied with aluminum-alloy cabinet. Required six BA-2 batteries (22.5V each), four BA-23 batteries (1.5V each) and P-18 or P-20 headset. HS-30 headset may also be used. Minor circuit differences with model BC-221-Q.
- Net weight (2.2 lb = 1 kg)
- 38 lb (38 lb 0 oz) / 17.252 kg
- Source of data
- -- Original-techn. papers.
- Literature/Schematics (1)
- TM 11-300 (20 July 1944)
- Author
- Model page created by Emilio Ciardiello. See "Data change" for further contributors.
- Other Models
-
Here you find 21 models, 20 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Cardwell Mfg. Corp., The Allen D.: Brooklyn, NY
Collections
The model SCR-211-B is part of the collections of the following members.