• Country
• United States of America (USA)

• Manufacturer / Brand
• Roland Radio Corporation; Mount Vernon (NY)

• Year
• 1958

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 72255

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

• Number of Transistors

• Semiconductors
• 2N411 2N409 2N409 R67_TI 2N405 2N306 2N306

• 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 / 6 x AA 1.5 Volt

• Loudspeaker
• 2 Loudspeakers / Ø 3 inch = 7.6 cm

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: 7 Transistor-Twin Speaker Bi-Fidelity "Duet" 71-483 - Roland Radio Corporation;

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 6.5 x 4.125 x 2 inch / 165 x 105 x 51 mm

• Notes

• The Roland Radio Model TW6 is a Battery operated Transitorized Portable AM Receiver.

  Similar to Electrohome TW6 and Firestone 4-C-40.

• Price in first year of sale
• 49.95 USD

• Circuit diagram reference
• Beitman Radio Diagrams Vol. 19, 1959

• Mentioned in
• Collector's Guide To TrR1 Bunis trans.94 (1996, page 232)

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date 12-58, Set 423, Folder 20)

• Author
• Model page created by Hinrich Grensemann † 15.5.16. See "Data change" for further contributors.

• Other Models

• Here you find 68 models, 57 with images and 62 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Roland Radio Corporation; Mount Vernon (NY)