• Country
• New Zealand-Aotearoa

• Manufacturer / Brand
• Cromwell, Gulbransen (NZ), Pacemaker, (Brands) Clarke, H. W.; Wellington

• Year
• 1948/1949

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 233706

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

• Number of Tubes
• 5

• Valves / Tubes
• 6BA6 6BE6 6BA6 6AT6 6AQ5

• Number of Transistors

• Semiconductors
• Tr.Gl.=Metal-rectif.

• Main principle
• Superhet with RF-stage; ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast only (MW).

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

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm

• Material
• Special material, described in the notes.

• from Radiomuseum.org
• Model: Gulbransen Little Jewel 518N - Cromwell, Gulbransen NZ,

• Shape
• Design Radio or Novelty / Gadget - fancy or unusual shape.

• Dimensions (WHD)
• 150 x 240 x 150 mm / 5.9 x 9.4 x 5.9 inch

• Notes

• Bakelite case with the centre section of brass sheet metal and a carrying handle.

  GULBRANSEN model 518N Bakelite 1948 nicknamed "THE FRIDGE".

  5 Valve (tube) model with Selenium Rectifier RE.3612. 

  Celestion 5" PM speaker equiped with a low resonance cone suspension and high impedance transformer and should only be replaced with the same type.

  Available colors: brown bakelite / finished (painted) white, gray-green, red, metallic green.

  The USA model was the Little Jewel, "Refrigerator",   WESTINGHOUSE H-126

  See also CROMWELL 518N. 

  Manufactured by Collier & Beale Ltd for H. W. Clarke Ltd who used to import the American Gulbransens until import restrictions were imposed in 1936.

   

• Net weight (2.2 lb = 1 kg)
• 3.5 kg / 7 lb 11.3 oz (7.709 lb)

• Price in first year of sale
• 21.00 NZ Guineas

• Mentioned in
• -- Collector info (Sammler) (Hauraki Plains Gazette 26 November 1948 Page 4)

• Literature/Schematics (1)
• RADIO ART by Robert Hawes & The RADIO by David Attwood

• Literature/Schematics (2)
• Technical Information & Schematic by Collier & Beale Ltd. Wellington, New Zealand

• Literature/Schematics (3)
• The Golden Age of Radio in the Home 1986 (Page 47 (Cromwell model))

• Author
• Model page created by Bruce Wilkie. See "Data change" for further contributors.

• Other Models

• Here you find 120 models, 114 with images and 105 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Cromwell, Gulbransen (NZ), Pacemaker, (Brands) Clarke, H. W.; Wellington