• Country
• Czechoslovakia

• Manufacturer / Brand
• Tesla; Praha, Bratislava etc.

• Year
• 1950 ??

• Category
• Commercial Receiver (may include amateur bands)

• Radiomuseum.org ID
• 83921

• • Brand: Supraphon

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

• Number of Tubes
• 14

• Valves / Tubes
• 6BE6 6BE6 6BE6 6BA6 EF22 EF22 EF22 EBL21 6BA6 6BA6 6BA6 6B31 ECH21 AZ12

• Main principle
• Superhet, double/triple conversion; ZF/IF 2750/468 kHz

• Wave bands
• Wave Bands given in the notes.

• Power type and voltage
• Line / Batteries (any type) / 110; 125; 150; 200; 220; 240 / 12 & 300 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Power out
• 2 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: Lambda IV 550000 - Tesla; Praha, Bratislava etc.

• Shape
• Tablemodel, with any shape - general.

• Notes
• Kommunikationsempfänger mit Trommeltuner; KW-Detailbereiche unbekannt; zuschaltbarer BFO; externe Lautsprecher; HF-Vorstufe, schaltbares ZF-Bandfilter; S-Meter;
  In hohen Bereichen Dreifachmischung: 1.ZF 2750 kHz, mit Quarz 3218 kHz auf 2.ZF 468 kHz;
  Auch Doppelmischung auf 468 kHz für tiefe Empfangsfrequenzen.

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

• Author
• Model page created by a member from A. See "Data change" for further contributors.

• Other Models

• Here you find 1838 models, 1159 with images and 668 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tesla; Praha, Bratislava etc.