• Country
• New Zealand-Aotearoa

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

• Year
• 1954

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 328184

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

• Number of Tubes
• 6

• Valves / Tubes
• 1T4 1R5 1T4 1S5 DL96 DL96

• Number of Transistors

• Semiconductors
• Selenium-Rectifier

• Main principle
• Superhet with RF-stage; ZF/IF 460 kHz; 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Line / Batteries (any type) / 230 / 90 & 9 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 6 inch = 15.2 cm

• Material
• Bakelite or Plastics (type unknown)

• from Radiomuseum.org
• Model: Ultimate Troubadour RBO [Push-Pull output.] - Ultimate Brand, Radio Ltd. &

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

• Mentioned in
• More Golden Age of Radio (Page 132)

• Literature/Schematics (1)
• https://www.vintageradio.co.nz/model/ultimate/rbo

• Author
• Model page created by Stuart Irwin. See "Data change" for further contributors.

• Other Models

• Here you find 152 models, 127 with images and 133 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