• Country
• United States of America (USA)

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

• Year
• 1952

• Category
• Military Transceiver (TRX)

• Radiomuseum.org ID
• 122848

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

• Number of Tubes
• 8

• Valves / Tubes
• 6050 6050 6147 6147 6050 6050 2E32 3Q4

• Main principle
• Transceiver

• Wave bands
• VHF incl. FM and/or UHF (see notes for details)

• Power type and voltage
• Storage and/or dry batteries / 1,25 & 117 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Material
• Metal case

• from Radiomuseum.org
• Model: Rescue radio / SAR RT-159/URC-4 - MILITARY U.S. different makers

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Notes

• Dual channel, VHF/UHF SAR rescue radio receiver/transmitter, Xtal controlled 121,5 / 243 MHz. 35mW RF output power, 10µV sensitivity. AM/MCV emission.
  Requires BA-1264 battery pack.
  TM11-510 technical manual.
  British made units (mfr. Thorn Electrical) use Hivac subminiature tubes, XFR2, XFR2, XR4.
  
  The tubes and indicated voltages are from schematic. An article on Italian magazine "CQ Elettronica" of Mr. Umberto Bianchi, famous ex Italian Surplus expert  asserts that since 1.25 and 117 DC V batteries are difficult to find, this device can operate with more readily available batteries: 1.4 and 90 DC V.

• Mentioned in
• CQ Elettronica, CD editor, number 5 May 1975

• Author
• Model page created by Emilio Ciardiello. 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)