• 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
• 210511

• Number of Tubes
• 4

• Valves / Tubes
• EF80 EF80 EF80 EF80

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

• Wave bands
• FM Broadcast Band Only

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

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Ula-Superi 535 - 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