• Country
• Great Britain (UK)

• Manufacturer / Brand
• McMichael Radio Ltd.; Slough

• Year
• 1931

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 199958

• • alternative name: McMichael, Leslie

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

• Number of Tubes
• 4

• Valves / Tubes
• PM2 PM1LF HL2/C 215SG

• Main principle
• TRF with regeneration

• Tuned circuits
• 2 AM circuit(s)

• Wave bands
• Broadcast (MW) and Long Wave.

• Power type and voltage
• Storage and/or dry batteries / 90 & 2 Volt

• Loudspeaker
• -Loudspeaker incorporated, but system not known.

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: Super Range Portable Four C - McMichael Radio Ltd.; Slough

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

• Dimensions (WHD)
• 395 x 395 x 240 mm / 15.6 x 15.6 x 9.4 inch

• Notes

• There are three versions of the Super Range Portable Four in the same case and same moulded Bakelite speaker grill:

  1. Type A: 1929 (SRPF without scale). Earliest version has Super Screened Portable Four Fretwork.
  2. Type B: 1930  Differences not known
  3. Type C: 1931 With a scale. This model.

  There are possibly more than four later TRF portables in the same case and speaker grill with incremental design changes, including the Duplex Four Portable Type C, the Duplex Four Portable Type S and the SMC Duplex Four Portable Early & Late versions.

• Literature/Schematics (1)
• Wireless World (The), London (WW, 79) (January 20th, 1932)

Article in Wireless World, January 20th, 1932

516 KB

• Documents regarding this model

• Author
• Model page created by Hans De Seijn. See "Data change" for further contributors.

• Other Models

• Here you find 183 models, 123 with images and 120 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from McMichael Radio Ltd.; Slough