• Country
• Netherlands

• Manufacturer / Brand
• Philips; Eindhoven (tubes international!); Miniwatt

• Year
• 1970

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 331026

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

• Number of Transistors
• 7

• Semiconductors
• M215E MPS9606 MPS9606 MPS9636 MPS9696 MPS9696

• Main principle
• Superheterodyne (common)

• Wave bands
• Broadcast only (MW).

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

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

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Mighty Mini 90RL078 - Philips; Eindhoven tubes

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

• Dimensions (WHD)
• 70 x 110 x 38 mm / 2.8 x 4.3 x 1.5 inch

• Notes

• In Juy of 1970 it was advertized as a "New from Philips, The Mighty Mini", as follows:

  • This is the new Philips 90RL078
  • It is just four inches high
  • It gives the big, clear sound you expect only from bigger transistors
  • And you get a longer playing time
  • Because it runs on three instead of two penlight batteries
  • Once you hear Philips new 90RL078 you will know why we call it the "Mighty Mini"
  • Other features
    • A vertical dial for easy station identification
    • Black and silver finish
    • Carrying case and earphone
    • 7 transistors

  This MW radio uses only silicon transistors, leaving behind the previous generation that still used a mix of silicon on the RF stages and germanium on the audio stages. Additionally, the audio stage uses four DC coupled transistors with complementary output transistor pair, AC coupled to the 8 Ohm speaker by a large (200uF) capacitor.

   

   

   

   

• Net weight (2.2 lb = 1 kg)
• 0.215 kg / 0 lb 7.6 oz (0.474 lb)

• Mentioned in
• -- Original prospect or advert (Aurora Kontakt catalogue, Nov. 1970, Nr.37, p. 78)

• Author
• Model page created by Jose Mesquita. See "Data change" for further contributors.

• Other Models

• Here you find 5233 models, 4365 with images and 3446 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philips; Eindhoven (tubes international!); Miniwatt