• Country
• Japan

• Manufacturer / Brand
• Hitachi Ltd.; Tokyo

• Year
• 1960

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 78423

• • alternative name: Hitachi Sales Corp. of America

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

• Number of Transistors
• 6

• Semiconductors
• 2N219 or. 2SA15 2N218 or. 2SA12 2N218 or. 2SA12 2N215 or. 2SB75 2N217 or. 2SB77 2N217 or. 2SB77 1N34A

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 9 Volt

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

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: TH-666R - Hitachi Ltd.; Tokyo

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

• Notes

• See also the model TH-666 and the external speaker.

  The TH-666R has double earphone jacks on the top of the radio, the TH-666 model has only one earphone jack. 

• Mentioned in
• Beitman Radio Diagrams, Vol. 20, 1960

• Author
• Model page created by Trev Levick. See "Data change" for further contributors.

• Other Models

• Here you find 1057 models, 947 with images and 242 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Hitachi Ltd.; Tokyo