• Country
• New Zealand-Aotearoa

• Manufacturer / Brand
• Ultimate-Ekco (N.Z.) Co. Ltd.; Auckland

• Year
• 1957 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 181863

• Number of Transistors
• 8

• Semiconductors
• 2N544 2N412 OC72 OC72 2N412 2N412 OC71 2N406

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 6 x 1,5 Volt

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

• Power out
• 0.4 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: RDM R-50-23 - Ultimate-Ekco N.Z. Co. Ltd.;

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

• Dimensions (WHD)
• 260 x 215 x 110 mm / 10.2 x 8.5 x 4.3 inch

• Notes
• Chassis, knobs and scale are same as Ultimate/Ekco "Explorer 8" except for minor component differences. Weight 3.0kg with batteries, 6x "D" cells. Probably made bu Ultimate/Ekco in New Zealand under licence for the local market.

• Net weight (2.2 lb = 1 kg)
• 3 kg / 6 lb 9.7 oz (6.608 lb)

• Source of data
• - - Data from my own collection

• Author
• Model page created by Martin Cook. See "Data change" for further contributors.

• Other Models

• Here you find 35 models, 34 with images and 23 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Ultimate-Ekco (N.Z.) Co. Ltd.; Auckland