• Country
• Japan

• Manufacturer / Brand
• Sanwa Electric Instrument Co., Ltd.; Tokyo

• Year
• 1977 ?

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 353914

• Wave bands
• - without

• Power type and voltage
• Dry Batteries / 3 x 1.5 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Insulation Tester PDM-500 - Sanwa Electric Instrument Co.,

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

• Notes

• Battery operated.
  Only MΩ range.

• Mentioned in
• -- Original prospect or advert (Electronic Engineering, January 1977 page 34, 21 enquiry card.)

• Author
• Model page created by Pier Antonio Aluffi. See "Data change" for further contributors.

• Other Models

• Here you find 57 models, 55 with images and 24 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sanwa Electric Instrument Co., Ltd.; Tokyo