• Country
• Japan

• Manufacturer / Brand
• Sony Corporation; Tokyo

• Year
• 1987 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 187638

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

• Number of Transistors
• 19

• Semiconductors

• Main principle
• Superheterodyne (common)

• Wave bands
• Broadcast, Long Wave and FM or UHF.

• Power type and voltage
• Dry Batteries / 3 x 1,5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 7.7 cm = 3 inch

• Power out
• 0.28 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: ICF-M300L - Sony Corporation; Tokyo

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

• Dimensions (WHD)
• 180 x 100 x 32 mm / 7.1 x 3.9 x 1.3 inch

• Notes

• Features:
  - Quartz controlled PLL synthesizer digital radio
  - 7 station presets per band
  - Digital clock 
  - Alarm
  - Sleep timer
  - Selectable MW CH Step 9/10KHz

  Coverage: FM 87.5-108 MHz, MW 531-1.602 kHz, LW 153-281 kHz.
  Jacks for ext. DC 4.5 V and earphones.
  Built-in digital clock, Alarm, Sleep modes.

  
  There are thee variants of this radio:

  
  M300L    LW, MW, FM;

  M300S    SW (49m), MW, FM;

  M300V    TV (ch1-12), MW, FM sold in Japan market.

  
  
   

  It uses 19 x transistors and these ICs:

  IC1    CXA-1019M  FM/AM radio receiver
  IC2    UPC393G2  Dual Comparator 
  IC3    LA5003  3V low drop voltage regulator
  IC4    S81230AG 3V voltage regulator
  IC100    UPD1715G-551-22 4-bit microcomputer & prescaler PLL & LCD driver
  IC101    S-8052ANB-NE Voltage detector

  
  
   

• Net weight (2.2 lb = 1 kg)
• 0.425 kg / 0 lb 15 oz (0.936 lb)

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

• Other Models

• Here you find 3921 models, 3781 with images and 950 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sony Corporation; Tokyo