• Country
• Germany

• Manufacturer / Brand
• Südfunk-Apparatebau, Dr. Ing. Robert Ott; Stuttgart

• Year
• 1953/1954

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 17128

• Number of Tubes
• 7

• Valves / Tubes
• EC92 ECH42 EF41 EF41 EM34 EABC80 EL41

• Number of Transistors

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

• Main principle
• Superheterodyne (common); ZF/IF 470/10800 kHz

• Tuned circuits
• 7 AM circuit(s)     11 FM circuit(s)

• Wave bands
• Broadcast, Long Wave, Short Wave plus FM or UHF.

• Power type and voltage
• Alternating Current supply (AC) / 110; 125; 150; 220; 240 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical

• Material
• Wooden case

• from Radiomuseum.org
• Model: Diamant W81K - Südfunk-Apparatebau, Dr. Ing.

• Shape
• Tablemodel with Push Buttons.

• Dimensions (WHD)
• 460 x 250 x 320 mm / 18.1 x 9.8 x 12.6 inch

• Notes
• Kurzwelle: 14...52 m.
  Doppelte Gegenkopplung, Bassanhebung.

• Net weight (2.2 lb = 1 kg)
• 9.5 kg / 20 lb 14.8 oz (20.925 lb)

• Price in first year of sale
• 269.00 DM

• External source of data
• E. Erb 3-907007-36-0

• Source of data
• Kat.d.Rundf.GrossH.1953/54 / Radiokatalog Band 2, Ernst Erb

• Mentioned in
• Funk-Technik (FT) (15/1953 S. X (Übersicht Rundf.-Empf. 1953/54))

• Other Models

• Here you find 156 models, 114 with images and 32 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Südfunk-Apparatebau, Dr. Ing. Robert Ott; Stuttgart