• Country
• Finland

• Manufacturer / Brand
• Voima, Helsinki

• Year
• 1970 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 204446

• Number of Tubes
• 9

• Valves / Tubes
• unknown_Tube EL84 EL84 EL84 EL84

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Superheterodyne (common)

• Wave bands
• FM Broadcast Band Only

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

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

• Power out
• 18 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: Voima OP-3 - Voima, Helsinki

• Dimensions (WHD)
• 145 x 335 x 465 mm / 5.7 x 13.2 x 18.3 inch

• Notes
• This Voima OP-3 was designed and made by Finnish legendary audio designer Tapio Köykkä.
  Ortoperspecta tuner-amplifier. Main channel (M) 12W (2x EL84) PPP A/B class.
  Side (S) channels (R-L and L-R) 2x 3W (EL84 per channel) single ended A-class.
  FM tuner designed by Danish manufacturer Larsholt and modified for the Ortoperspecta system by Köykkä.

• Net weight (2.2 lb = 1 kg)
• 17 kg / 37 lb 7.1 oz (37.445 lb)

• Author
• Model page created by Jouni Tornberg. See "Data change" for further contributors.

• Other Models

• Here you find 8 models, 5 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Voima, Helsinki