• Country
• Norway

• Manufacturer / Brand
• Standard Telefon og Kabelfabrik (STK); Oslo

• Year
• 1937/1938

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 89715

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

• Number of Tubes
• 6

• Valves / Tubes
• 6A7 78 75 6B5 6G5 or 6H5 80

• Main principle
• Superheterodyne (common); ZF/IF 145 kHz

• Wave bands
• Broadcast, Long Wave and Short Wave.

• Power type and voltage
• Alternating Current supply (AC) / 115; 125; 135; 150; 225; 250 & 0,9 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 22 cm = 8.7 inch

• Material
• Wooden case

• from Radiomuseum.org
• Model: Ekko 538 - Standard Telefon og

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

• Dimensions (WHD)
• 600 x 380 x 280 mm / 23.6 x 15 x 11 inch

• Notes

• Identical model to Radiobell 538A but with a different back cover. Made for export and sold under the Ekko name, but has "Radiobell" written on front.

  Bias cell 0.9 V.

• Source of data
• -- Original prospect or advert

• Literature/Schematics (1)
• -- Schematic

• Author
• Model page created by Hugo Sneyers. See "Data change" for further contributors.

• Other Models

• Here you find 14 models, 13 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Standard Telefon og Kabelfabrik (STK); Oslo