• Country
• Poland

• Manufacturer / Brand
• Unitra ZRK, Zaklady Radiowe im. M. Kasprzaka

• Year
• 1958

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 274877

• • Brand: Unitra

• Number of Tubes
• 6

• Valves / Tubes
• ECH21 EF22 EF22 EBL21 EM4 AZ1

• Main principle
• Superheterodyne (common); ZF/IF 465 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast, Long Wave and 2 x Short Wave.

• Power type and voltage
• Alternating Current supply (AC) / 120; 220 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical

• Material
• Wooden case

• from Radiomuseum.org
• Model: Etiuda 3281 - Unitra ZRK, Zaklady Radiowe im

• Shape
• Tablemodel, low profile (big size).

• Author
• Model page created by Tomasz Szczesniak. See "Data change" for further contributors.

• Other Models

• Here you find 214 models, 185 with images and 90 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Unitra ZRK, Zaklady Radiowe im. M. Kasprzaka