SCR-211-AC Frequency Meter Set (BC-221-AC)

Rauland Corp.; Chicago, IL

Data
Forum
Pictures
Collections

  • Year
  • 1942
  • Category
  • Service- or Lab Equipment
  • Radiomuseum.org ID
  • 142685

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • 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
  • Wooden case
  • from Radiomuseum.org
  • Model: SCR-211-AC Frequency Meter Set - Rauland Corp.; Chicago, IL
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Dimensions (WHD)
  • 10.5 x 15 x 9.75 inch / 267 x 381 x 248 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. Required six BA-2 batteries (22.5V each), four BA-23 batteries (1.5V each) and HS-30 headset. P-18 or P-20 headsets may also be used. Circuit similar to models BC-221-M, -O and -R.
  • Net weight (2.2 lb = 1 kg)
  • 43 lb (43 lb 0 oz) / 19.522 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.

 Collections | Museums | Literature

Collections

The model SCR-211-AC is part of the collections of the following members.

 Forum