• Country
• Czechoslovakia

• Manufacturer / Brand
• Telegrafia, akc. spol., Praha-Pardubice

• Year
• 1927/1928

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 75619

• Number of Tubes
• 4

• Valves / Tubes
• A409 A415 B409 B403

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown)

• Tuned circuits
• 2 AM circuit(s)

• Wave bands
• Broadcast (MW) and Long Wave.

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

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Neutrodyn 444002 - Telegrafia, akc. spol., Praha-

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Dimensions (WHD)
• 470 x 203 x 213 mm / 18.5 x 8 x 8.4 inch

• Price in first year of sale
• 900.00 Kc

• External source of data
• Telegrafia sales pricelist, 1930

• Mentioned in
• Philips Radio Funktechnische Monatsschrift, Dezember 1928

• Author
• Model page created by Eduard Pavlik. See "Data change" for further contributors.

• Other Models

• Here you find 67 models, 45 with images and 46 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Telegrafia, akc. spol., Praha-Pardubice