• Country
• New Zealand-Aotearoa

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

• Year
• 1942

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 346832

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

• Number of Tubes
• 7

• Valves / Tubes

• Main principle
• Superhet with RF-stage; ZF/IF 465 kHz; 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast and Short Wave (SW).

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

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 8 inch = 20.3 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: Gulbransen 722 - Cromwell, Gulbransen NZ,

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 555 x 344 x 260 mm / 21.9 x 13.5 x 10.2 inch

• Notes

• 7 valve (including magic eye) dual wave superhet with RF stage table model receiver.

  Almost identical to its predecessor Model 720 from 1940. Documentation for the 720 includes: Valves (6 + magic eye):
  6D6, 6A7, 6D6, 6B7, 42, 80 and 6U5 Magic Eye (some early variants)
  6K7G, 6K8, 6K7G, 6B8G, 6F6G, 5Y3G and 6U5 Magic Eye
  Also seen (possibly 722 variant lineup):
  6U7G, 6K8, 6U7G, 6B6G, 6F6G, 80 and 6U5 Magic Eye.

   

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

• Other Models

• Here you find 111 models, 106 with images and 97 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