• Country
• Finland

• Manufacturer / Brand
• Oy Helvar; Helsinki

• Year
• 1953

• Category
• Pre-stage (adaptor for SW/FM/VHF/UHF incl. built-in), Frequency converter

• Radiomuseum.org ID
• 210510

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

• Number of Tubes
• 2

• Valves / Tubes
• EAF42 EAF42

• Main principle
• RF Converter/Adapter (not voltage converter)

• Wave bands
• FM Broadcast Band Only

• Power type and voltage
• Powered by external power supply or a main unit. / 6,3 & 170-250 Volt

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Ula-värähdin 532U - Oy Helvar; Helsinki

• Shape
• Chassis only or for «building in»

• Author
• Model page created by Timo Rantasaari. See "Data change" for further contributors.

• Other Models

• Here you find 254 models, 215 with images and 93 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Oy Helvar; Helsinki