Check the listing for details. 1952 Rescue Radio Receiver Transmitter RT-159B/URC-4. Condition: Used. Listed at 97.50 USD. 1952 Rescue Radio Receiver Transmitter RT-159B/URC-4. Very nice condition and a nice piece of Koren War Era Americana. Info and photos below from the Radio Museum: Rescue radio / SAR RT-159/URC-4 (URC4) MILITARY U.S. (different makers for same model) CountryUnited States of America (USA) Manufacturer / BrandMILITARY U.S. (different makers for same model) Year1952 Category Commercial Transmitter & Receiver (TRX not Amateur) Radiomuseum ID MILITARY U.S. Rescue radio / SAR RT-159/URC-4 (1) Technical Specifications Number of Tubes8 Valves / Tubes Wave bandsVHF incl. FM and/or UHF (see notes for details) Power type and voltageStorage and/or dry batteries / 1,25 & 117 Volt LoudspeakerPermanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) MaterialMetal case from RadiomuseumModel: Rescue radio / SAR RT-159/URC-4 - MILITARY U.S. different makers ShapeVery 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 inCQ Elettronica, CD editor, number 5 May 1975 AuthorModel page created by Emilio Ciardiello. See "Data change" for further contributors.