• Country
• Poland

• Manufacturer / Brand
• Unitra ELTRA; Zaklady Radiowe; Bydgoszcz

• Year
• 1959/1960

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 108541

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

• Number of Transistors
• 5

• Semiconductors
• OC44 or. OC613 OC45 or. OC612 or. OC70 OC45 or. OC612 or. OC70 OC71 or. OC604 OC72 or. OC604spez DOG56

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

• Tuned circuits
• 5 AM circuit(s)

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

• Power type and voltage
• Dry Batteries / 4 × 1,5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 7 cm = 2.8 inch

• Power out
• 0.03 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: MOT 59-1 - Unitra ELTRA; Zaklady Radiowe;

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Dimensions (WHD)
• 150 x 85 x 40 mm / 5.9 x 3.3 x 1.6 inch

• Notes

• Erstes Transistor-Radio polnischer Produktion.
  First Transistor-radio made in Poland.

  Long wave band preset to one station only - Warsaw I (1322 m.) - The first transistor radio designed in 1958 and built on a PC board in Poland in 1959. It employed imported Telefunken transistors at first and then Philips transistors. Other components were made in Poland. Only a few hundred radios were manufactured. After one year the output stage of the radio was modified to "single-ended-push-pull" increasing the output power from 30 mW to 80 mW and a new radio called Koliber was born in 1961.

• Net weight (2.2 lb = 1 kg)
• 0.530 kg / 1 lb 2.7 oz (1.167 lb)

• Price in first year of sale
• 1,250.00 PLN

• Source of data
• -- Schematic

• Literature/Schematics (1)
• -- Original prospect or advert

• Other Models

• Here you find 90 models, 83 with images and 45 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Unitra ELTRA; Zaklady Radiowe; Bydgoszcz