• Country
• Poland

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

• Year
• 1966

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 107221

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

• Number of Transistors
• 6

• Semiconductors
• AF137 OC1044 OC1044 OC1071 OC1072 OC1072

• Main principle
• Superheterodyne (common); ZF/IF 465 kHz

• Tuned circuits
• 5 AM circuit(s)

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

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

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

• Power out
• 0.08 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Sylwia MOT-633 - Unitra ELTRA; Zaklady Radiowe;

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

• Dimensions (WHD)
• 160 x 90 x 38 mm / 6.3 x 3.5 x 1.5 inch

• Notes

• Sylwia MOT 633 ist ein Taschensuper für MW mit einem Anschluß für einen Kopfhörer.

• Net weight (2.2 lb = 1 kg)
• 0.5 kg / 1 lb 1.6 oz (1.101 lb)

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

• Literature/Schematics (1)
• Radio es Televizio Vevö keszülekek 1967-69 (Rences Tamás: Rádió Kapcsolások,Budapest, 1971.)

• Author
• Model page created by Franz Scharner. See "Data change" for further contributors.

• Other Models

• Here you find 90 models, 84 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