R-391/URR

Collins Radio Company; Cedar Rapids (IA)

Data
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  • Year
  • 1952 ?
  • Category
  • Military Receiver
  • Radiomuseum.org ID
  • 200177

 Technical Specifications

  • Number of Tubes
  • 33
  • Valves / Tubes
  • Main principle
  • Superhet, double/triple conversion
  • Wave bands
  • Broadcast plus more than 2 Short Wave bands.
  • Power type and voltage
  • Alternating Current supply (AC) / 115; 230 Volt
  • Loudspeaker
  • - This model requires external speaker(s).
  • Material
  • Metal case, TUBES VISIBLE
  • from Radiomuseum.org
  • Model: R-391/URR - Collins Radio Company; Cedar
  • Shape
  • Rack
  • Dimensions (WHD)
  • 19 x 10.5 x 14.75 inch / 483 x 267 x 375 mm
  • Notes

  • Autotune (8 channels, Moore says 7 position autotune!) version of the R-390/URR. IF: 9-18 MHz, 2-2.5 MHz, 455 kHz. BFO; S-Meter; 500 to 32,000 kHz. Front panel differs from R-390 by an additional knob on the left side directly below the bandwith knob.

    Differences between the R-391 & R-390 knobs and switches are:

    • The R-391 has auto-tune remote or local switch, the R-390 has a dial lock knob.
    • The R-391 has additional switch for auto-tune channels 1 through 8.
    • The R-391 KC and MC knobs have a latch to mechanically disconnect the auto-tune mechanism from the tuning mechanism, so you can use the radio similar to an R-390.
  • Net weight (2.2 lb = 1 kg)
  • 78 lb (78 lb 0 oz) / 35.412 kg
  • Literature/Schematics (1)
  • TM 11-863
  • Author
  • Model page created by Norman Ryan. See "Data change" for further contributors.

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The model R-391/URR is part of the collections of the following members.

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