• Country
• Germany

• Manufacturer / Brand
• Heli Gerätebau, Hempel KG; Limbach-Oberfrohna, (Ostd.)

• Year
• 1968/1969

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 14972

• • alternative name: Gerätebau Limbach VEB
  • Brand: VEB Elektromechanik Mittweida

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

• Number of Tubes
• 6

• Valves / Tubes
• ECC85 ECH81 EBF89 EBF89 EM84 EZ80

• Number of Transistors
• 22

• Semiconductors

• Main principle
• Superheterodyne (common); ZF/IF 455/10700 kHz

• Tuned circuits
• 8 AM circuit(s)     12 FM circuit(s)

• Wave bands
• Broadcast, Long Wave, Short Wave plus FM or UHF.

• Power type and voltage
• Alternating Current supply (AC) / 110; 127; 220; 240 Volt

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

• Power out
• 8 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: RK4 - Heli Gerätebau, Hempel KG;

• Shape
• Book-shelf unit.

• Dimensions (WHD)
• 525 x 165 x 280 mm / 20.7 x 6.5 x 11 inch

• Notes
• Chassis und elektrische Daten entsprechen dem RCX1002 (siehe dort). Design "Bausteinserie '66". 14 Dioden; NF mit Transistoren. Stereo-Decoder: ST-D4-2, autom. Stereoanzeige über EM84.

• Net weight (2.2 lb = 1 kg)
• 10 kg / 22 lb 0.4 oz (22.026 lb)

• External source of data
• E. Erb 3-907007-36-0

• Source of data
• -- Original prospect or advert / Radiokatalog Band 2, Ernst Erb

• Mentioned in
• Die Geschichte der Rundfunkindustrie der DDR Band 1 1945 - 1967

• Other Models

• Here you find 119 models, 108 with images and 66 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Heli Gerätebau, Hempel KG; Limbach-Oberfrohna, (Ostd.)