• Country
• Austria

• Manufacturer / Brand
• Minerva-Radio (Radiola-Radioapparate und Bestandteile W. Wohleber & Co) ; Wien

• Year
• 1949–1951

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 9850

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

• Number of Tubes
• 4

• Valves / Tubes
• UCH21 UCH21 UBL21 UY1N

• Number of Transistors

• Semiconductors
• NTC-Resistor

• Main principle
• Superheterodyne (common); ZF/IF 451 kHz

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast, Long Wave and Short Wave.

• Power type and voltage
• AC/DC-set / 110-220 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• from Radiomuseum.org
• Model: 504U - Minerva-Radio Radiola-

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Circuit diagram reference
• Lange-Nowisch

• Other Models

• Here you find 631 models, 568 with images and 450 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Minerva-Radio (Radiola-Radioapparate und Bestandteile W. Wohleber & Co) ; Wien