• Country
• United States of America (USA)

• Manufacturer / Brand
• MILITARY U.S. (different makers for same model)

• Year
• 1954 ??

• Category
• Military Receiver

• Radiomuseum.org ID
• 217640

• Number of Tubes
• 14

• Valves / Tubes
• 6AK5 6AK5 3A5 1U4 1U4 1L4 1U4 1L4 1A3 1S5 1S5 3Q4 3Q4 3A5 0B2

• Main principle
• Superhet with RF-stage; ZF/IF 4300 kHz; 2 AF stage(s)

• Wave bands
• Short Wave (SW only)

• Power type and voltage
• Line / Storage batteries (perhaps also batteries) / 6-24 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Power out
• 0.8 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: Radio Receiver R-108 / GRC - MILITARY U.S. different makers

• Shape
• Boatanchor (heavy military or commercial set >20 kg).

• Dimensions (WHD)
• 7 x 9 x 12 inch / 178 x 229 x 305 mm

• Notes
• Frequency range: 20 to 28 mc. Type of tuning: continuously variable, and detent selection of 3 preset frequencies. Channel spacing 100 kc. Number of channels: 80.
  Receiver type: FM, single-conversion, super-heterodyne. Types of signals received: voice-modulated or tone. Method of calibration of tuning dial: built-in, 4.3 mc, crystal-controlled oscillator. Calibration frequencies: multiples of 4.3 mc. Accuracy of calibration: approximately ± 0.1 percent.
  External (emergency supply): 6.3 volt and 130 volt external dc supply.
  Antenna: Portable whip antenna. Coaxial connector and binding post on front panel.
  Sensitivity: over 25 db signal plus noise-to noise ratio at 0.5 uv (microvolt), deviation ± 15 kc. RF oscillator range: 24.3 to 32.3 mc. Bandwidth: ( 6 db down) 85 kc ± 15 kc. Audio output impedances (each): 600-ohm unbalanced.
  Squelch circuit: continuously variable mounted SQUELCH control adjusts squelch sensitivity to open on signals from approximately 0.3 uv to 80 uv. OFF position of control disables squelch circuit.

• Net weight (2.2 lb = 1 kg)
• 25 lb (25 lb 0 oz) / 11.350 kg

• Source of data
• -- Original-techn. papers.

• Author
• Model page created by Jos Lauth. See "Data change" for further contributors.

• Other Models

• Here you find 393 models, 345 with images and 210 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from MILITARY U.S. (different makers for same model)