• Country
• Germany

• Manufacturer / Brand
• Becker, Max Egon, Autoradiowerk Ittersbach bei Pforzheim

• Year
• 1959–1966

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 22357

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

• Number of Transistors
• 5

• Semiconductors
• OC71 OC72 TF77/30 TF80/30 TF80/30

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Storage Battery for all (e.g. for car radios and amateur radios) / 12 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Metal case

• from Radiomuseum.org
• Model: Transistor-Sprechverstärker TR503 - Becker, Max Egon,

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 180 x 54 x 90 mm / 7.1 x 2.1 x 3.5 inch

• Notes
• Über die Jahre kleine Variationen bei der Bestückung.
  12-W-Vollverstärker für Einbau in Kfz. und Straßenbahnen. Eingänge: 2× Mikrofon, 1× TA; Ausgänge: 10, 15, 20, 30 Ohm.

• Net weight (2.2 lb = 1 kg)
• 1.3 kg / 2 lb 13.8 oz (2.863 lb)

• Price in first year of sale
• 390.00 DM

• External source of data
• Erb

• Source of data
• HdB d.Rdf-& Ferns-GrH 1960/61 / Radiokatalog Band 2, Ernst Erb

• Other Models

• Here you find 312 models, 228 with images and 161 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Becker, Max Egon, Autoradiowerk Ittersbach bei Pforzheim