• Year
  • 1929
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 77445

 Technical Specifications

  • Number of Tubes
  • 4
  • 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 / 4 & ? Volt
  • Loudspeaker
  • Magnetic loudspeaker (reed) generic.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Screen Grid Four SG2730 - Beethoven Brand, Montague
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Dimensions (WHD)
  • 14.5 x 19.25 x 9 inch / 368 x 489 x 229 mm
  • Notes
  • Cabinet similar to the 5-Valve Portable, but with different speaker grille and two large vernier dials.

  • Literature/Schematics (1)
  • Mullard Valve Replacement Guide 1933 to 1949

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