• Country
• Japan

• Manufacturer / Brand
• Unknown - CUSTOM BUILT: Japan

• Year
• 1970 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 186680

• Number of Transistors
• 7

• Semiconductors

• Main principle
• Superheterodyne (common)

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

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

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 cm = 1.6 inch

• Power out
• 0.1 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Invicta Micro 7 7YR-701 - Unknown - CUSTOM BUILT: Japan

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

• Dimensions (WHD)
• 56 x 68 x 30 mm / 2.2 x 2.7 x 1.2 inch

• Notes

• Invicta Micro 7 Transistor pocket radio.

  Made in Japan.

• Net weight (2.2 lb = 1 kg)
• 0.170 kg / 0 lb 6 oz (0.374 lb)

• Author
• Model page created by Eckhard Wegner. See "Data change" for further contributors.

• Other Models

• Here you find 1131 models, 993 with images and 97 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Unknown - CUSTOM BUILT: Japan