• Country
• Australia

• Manufacturer / Brand
• His Master's Voice (HMV, H.M.V.), EMI (Australia) Ltd.; Sydney, NSW

• Year
• 1974/1975

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 225766

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

• Number of Transistors
• 7

• Semiconductors
• SE1010 SE1001 SE1001 SE4010 AX1108 AC187 AC188 OA90 OA90 AS25

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; 3 AF stage(s)

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 240 Volt

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

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Little Nipper 68-55 [68-55/2] - His Master's Voice HMV, H.M.V.

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Dimensions (WHD)
• 310 x 135 x 130 mm / 12.2 x 5.3 x 5.1 inch

• Notes

• A Mantle Only radio from the HMV stable. Previous models bore the designation "Little Nipper" but this has only the model number. It has an elliptical speaker measuring 5 by 3 inches with an impedance of 15 Ohms. The case is simulated timber with a black front. The radio has a short wire protruding from the rear of the case for an external aerial connection but the RF earth connection is via the Mains Lead. Indicating it's later development, the chassis earth is negative. The push-pull output transistors are specified as a "Matched Pair" and whilst the other transistors are silicon, the output pair are germanium.

  Plastic cabinet finished in Red, Charcoal, Ivory & Teak (Woodgrain).

  Electrically indentical to the eariler HMV Little Nipper 66-55. For service details see HMV Service Manual for Model 66-55 or J.R. Transistor Service Handbook Group C6, 1969, page H53.

  See also HMV Clock Radio 67-55 with same circuitry.

  The circuitry starts with the 66-55 but that has a rotary dial pointer. The 67-55, Clock Radio and later variants use a linear dial.

  The last variant, the 68-55/2 uses the same case and fascia but has all silicon transistors. The transistor count grows to 8 with the revised output stage.

  See also the HMV (NZ) Sprite which has the 66-55 circuitry, the rotary dial pointer but a particle board timber case.

• Net weight (2.2 lb = 1 kg)
• 2.5 kg / 5 lb 8.1 oz (5.507 lb)

• Price in first year of sale
• 55.00 AUS $

• Source of data
• -- Schematic

• Literature/Schematics (1)
• J.R. Publications Transistor Radio Service Handbook (Group C6, 1969, Page H53.)

• Author
• Model page created by Brian Wilson. See "Data change" for further contributors.

• Other Models

• Here you find 586 models, 406 with images and 283 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from His Master's Voice (HMV, H.M.V.), EMI (Australia) Ltd.; Sydney, NSW