• Country
• Belgium

• Manufacturer / Brand
• Philips Belgium (Belgien)

• Year
• 1948/1949

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 251099

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

• Number of Tubes
• 6

• Valves / Tubes
• ECH21 EF22 EF22 EBL21 EM4 AZ1

• Main principle
• Superheterodyne (common); ZF/IF 452 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast, Long Wave and more than two Short Wave bands.

• Power type and voltage
• Alternating Current supply (AC) / 110; 125; 145; 200; 220; 240 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 19 cm = 7.5 inch

• Power out
• 4 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: BX680A /48 - Philips Belgium Belgien

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

• Dimensions (WHD)
• 570 x 400 x 245 mm / 22.4 x 15.7 x 9.6 inch

• Notes
• AM radio for external antenna:
  • LW: 150 - 420 kHz.
  • BC: 420 - 1620 kHz.
  • SW1: 8,1 - 5,9 MHz (37m - 50m with bandspread 49-50m).
  • SW2: 9,67 - 7,06 MHz (31m - 42,5m with bandspread 40-42m).
  • SW3: 12,5 - 9,43 MHz (24m - 31,8m with bandspread 30-31m).
  • SW4: 15,8 - 11,6 MHz (19m - 25,8m with bandspread 25m).
  • SW5: 19,3 - 15 MHz (15,5m - 20m with bandspread 19-20m).
  • SW6: 23,08 - 17,65 MHz (13m - 17m with bandspread 15-16m).

  By connecting a capacitor in series with the tuning capacitor, the total capacity change per unit of rotation is no longer linear but has the effect of stretching the chosen shortwave band when the tuning capacitor is turned in (at lowest frequency or highest meters).

  Loudspeaker: 9702-05 (7Ω, with soundwave diffuser).

  Dial lamp: 2x 8045D (E10, 6.3V/320mA).
   
  Version /48 is basically the same as version /19 but for the mains transformer and a extra fuse. See technical documents uploaded with this model.

• Net weight (2.2 lb = 1 kg)
• 11.5 kg / 25 lb 5.3 oz (25.33 lb)

• Literature/Schematics (1)
• -- Original-techn. papers.

• Author
• Model page created by Radiomuseum Olen Museum. See "Data change" for further contributors.

• Other Models

• Here you find 595 models, 570 with images and 342 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philips Belgium (Belgien)