• Country
• New Zealand-Aotearoa

• Manufacturer / Brand
• Ultimate (Brand), Radio Ltd. & Radio (1936) Ltd.; Auckland

• Year
• 1951–1956

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 360801

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

• Number of Tubes
• 5

• Valves / Tubes

• Main principle
• Superheterodyne (common); ZF/IF 460 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 50Hz, 230 Volt

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

• Power out
• 3 W (max.)

• Material
• Bakelite or Plastics (type unknown)

• from Radiomuseum.org
• Model: Ultimate Tawa RBK - Ultimate Brand, Radio Ltd. &

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

• Dimensions (WHD)
• 380 x 280 x 145 mm / 15 x 11 x 5.7 inch

• Notes

• Ultimate RBK Tawa

  5-Valve superhet broadcast (MW) mantel model receiver with Rola 6-9H elliptical speaker.

  Manufactured 1951-1956 with valve lineups as follows:

  • Early models 6BE6 6AR7 6AV6 6AQ5 6X4
  • Later models 6BE6 EF41 6AV6 EL41 6X4

  See also Courier RBK, Skyscraper RBK & Rolls RBK using the same chassis.

  Manufactured by Radio (1936) Ltd.

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

• Other Models

• Here you find 161 models, 137 with images and 142 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Ultimate (Brand), Radio Ltd. & Radio (1936) Ltd.; Auckland