• Country
• Czechoslovakia

• Manufacturer / Brand
• Elektra, Pražský obchod potřebami pro domácnost; Praha

• Year
• 1950–1952

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 88544

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

• Number of Tubes
• 1

• Valves / Tubes
• ECH21 RV12P2000 or

• Number of Transistors

• Semiconductors
• Tr.Gl.=Metal-rectif.

• Main principle
• TRF with regeneration

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast and Short Wave (SW).

• Power type and voltage
• Alternating Current supply (AC) / 110/220 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 8 cm = 3.1 inch

• Power out
• 0.3 W (unknown quality)

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Sonoreta E21 - Elektra, Pražský obchod

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Dimensions (WHD)
• 170 x 110 x 115 mm / 6.7 x 4.3 x 4.5 inch

• Notes
• Nachfolge-Modell der Sonoreta RV12; Bausatz (kit). In the type Sonoreta E21 is used either metal (selen) rectifier or tube RV12P2000.So has 1 or 2 tubes. Selenium-Rectifier 2x 200V/30mA 2x 15 tablets diameter 18mm.

• Net weight (2.2 lb = 1 kg)
• 1.8 kg / 3 lb 15.4 oz (3.965 lb)

• Mentioned in
• -- Schematic (Radiojournal (CZ))

• Literature/Schematics (1)
• -- Original-techn. papers.

• Author
• Model page created by Berthold Bosch † 13.2.19. See "Data change" for further contributors.

• Other Models

• Here you find 29 models, 25 with images and 16 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Elektra, Pražský obchod potřebami pro domácnost; Praha