Solid State R-131 BK, GR, PR, YW

Philco, Philadelphia Stg. Batt. Co.; USA

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  • Year
  • 1973 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 216359

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

 Technical Specifications

  • Number of Transistors
  • 10
  • Semiconductors
  • Main principle
  • Superheterodyne (common); ZF/IF 455/10700 kHz; 3 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)     8 FM circuit(s)
  • Wave bands
  • Broadcast (BC) and FM or UHF.
  • Power type and voltage
  • Dry Batteries / 1 x 9 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 2.25 inch = 5.7 cm
  • Power out
  • 0.2 W (unknown quality)
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: Solid State R-131 BK, GR, PR, YW - Philco, Philadelphia Stg. Batt
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 1.5 x 3.2 x 5.7 inch / 38 x 81 x 145 mm
  • Notes

  • The Philco Solid State R-131 AM/FM Pocket Radio came in four case colors: black (BK), green (GR), red (PR), or yellow (YW); all models had the same chrome plated metal dial escutcheon.  The FM circuit had an additional front end RF amplifier stage.  Other features include a Philco speaker 0.2 watt, telescopic antenna, earphone jack, and wrist strap.

    The very similar R-940 has the same PCB/circuit and case except the dial escutcheon is plastic and the same color as the case, blue (BL) or orange (OR).  

    Note that non-black models used the R-131 BK labels with an overlayed stamp for the correct case color; the stamp may have faded over time, indicating the incorrect R-131 BK model name.

    Imprinted into the base:

    MADE IN TAIWAN BY PHILCO-TAIWAN

  • Literature/Schematics (2)
  • - - Manufacturers Literature (Philco Ford Service Data Portable Radio R131 BK/GR/PR/YW, R940 BL/OR, R171 BK, ID= PR4257, 1973.)
  • Author
  • Model page created by Franz Scharner. See "Data change" for further contributors.

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