• Country
• Netherlands

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

• Year
• 1940 ??

• Category
• Microphone or Pick-up element

• Radiomuseum.org ID
• 136990

• Wave bands
• - without

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Kohlemikrophon 4225/42 - Philips; Eindhoven tubes

• Shape
• Miscellaneous shapes - described under notes.

• Dimensions (WHD)
• 120 x 118 x 35 mm / 4.7 x 4.6 x 1.4 inch

• Notes
• Philips Kohlemikrophon-Kapsel 4225/42 mit Keramik-Korpus in federnder Aufhängung.

• Net weight (2.2 lb = 1 kg)
• 0.2 kg / 0 lb 7 oz (0.441 lb)

• Source of data
• -- Collector info (Sammler)

• Author
• Model page created by Nikolaus Löwe. 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