• Country
• Germany

• Manufacturer / Brand
• Blaupunkt (Ideal), Berlin, später Hildesheim

• Year
• 1939

• Category
• Power supply/conditioner or battery or charger 

• Radiomuseum.org ID
• 628

• • alternative name: Ideal-Radiotelephon- und App-fabr. || Ideal-Werke AG; Berlin (ab 1934)
  • Brand: Rotstern

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

• Number of Tubes
• 1

• Valves / Tubes
• EZ11

• Wave bands
• - without

• Power type and voltage
• Storage Battery for all (e.g. for car radios and amateur radios) / 6 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Wechselrichter WR39/40B - Blaupunkt Ideal, Berlin,

• Shape
• Chassis only or for «building in»

• Notes

• 6-V-Zerhacker für WR kl.battr.

• Price in first year of sale
• 50.00 RM

• Source of data
• Radiokatalog Band 1, Ernst Erb

• Circuit diagram reference
• Lange-Nowisch

• Other Models

• Here you find 3525 models, 3214 with images and 2320 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Blaupunkt (Ideal), Berlin, später Hildesheim