• Country
• Great Britain (UK)

• Manufacturer / Brand
• Beethoven (Electric Equipment), Montague Radio Inventions; London, Manchester

• Year
• 1929

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 77445

• Number of Tubes
• 4

• Valves / Tubes
• PM12M PM2HL PM2HL PM22A

• 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 Electric Equipment,

• 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.

• Source of data
• Radio! Radio!

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

• Author
• Model page created by Konrad Birkner † 12.08.2014. See "Data change" for further contributors.

• Other Models

• Here you find 46 models, 22 with images and 26 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Beethoven (Electric Equipment), Montague Radio Inventions; London, Manchester