• Country
• Poland

• Manufacturer / Brand
• PZT - Państwowe Zakłady Tele- i Radiotechniczne; Warsawa

• Year
• 1932–1939 ?

• Category
• Detector-Radio (Crystal or diode, without tubes/transistors)

• Radiomuseum.org ID
• 104445

• Main principle
• Crystal or Solid State Detector

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Echo D1 - PZT - Państwowe Zakłady Tele-

• Shape
• Miscellaneous shapes - described under notes.

• Dimensions (WHD)
• 80 x 80 x 75 mm / 3.1 x 3.1 x 3 inch

• Notes
• Rundes Bakelit-Gehäuse mit eingebautem Kristall (Apfel gennant). Nur fur eine Station Warszawa 1 (Langwellenbereich 225 kHz).

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

• Price in first year of sale
• 41.00 zl

• Source of data
• - - Data from my own collection

• Mentioned in
• Zlote Lata Radia, Polen

• Other Models

• Here you find 25 models, 22 with images and 7 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from PZT - Państwowe Zakłady Tele- i Radiotechniczne; Warsawa