• Country
• Netherlands

• Manufacturer / Brand
• Philips; Eindhoven (tubes international!); Miniwatt

• Year
• 1948 ?

• Category
• Power supply/conditioner or battery or charger 

• Radiomuseum.org ID
• 323699

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

• Number of Transistors

• Semiconductors
• 7934

• Wave bands
• - without

• Power type and voltage
• Direct Current supply (DC) / 110-145; 200-245 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Triller-omvormer 7897C - Philips; Eindhoven tubes

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 60 x 425 x 60 mm / 2.4 x 16.7 x 2.4 inch

• Notes

• Model 7897C, consisting of filter 7897 and vibrator 7934, converts mains DC supply into AC, so enabling AC radio receivers to be connected to DC mains supply.

• Net weight (2.2 lb = 1 kg)
• 1.5 kg / 3 lb 4.9 oz (3.304 lb)

• Mentioned in
• -- Original-techn. papers.

• Author
• Model page created by Gidi Verheijen. See "Data change" for further contributors.

• Other Models

• Here you find 5233 models, 4365 with images and 3446 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philips; Eindhoven (tubes international!); Miniwatt