Wzmacniacz - NF-Vorverstärker WAB-31a

FONIA, Zaklady Wytworcze Urzadzen Radia i Telewizji, Warsaw

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  • Year
  • 1965
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 215114

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

 Technical Specifications

  • Number of Tubes
  • 2
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Power type and voltage
  • Powered by external power supply or a main unit. / 6,3 & ? Volt
  • Loudspeaker
  • - For headphones or amp.
  • from Radiomuseum.org
  • Model: Wzmacniacz - NF-Vorverstärker WAB-31a - FONIA, Zaklady Wytworcze
  • Shape
  • Chassis only or for «building in»
  • Dimensions (WHD)
  • 55 x 100 x 300 mm / 2.2 x 3.9 x 11.8 inch
  • Notes
  • This device is meant do be used as a professional broadcast amplifier in radio, television, film studios, etc. as a microphone, buffer or line head amplifier.

    The the output stage is a push-pull type. It has symmetric input and output (transformer floating) with impedances independent of frequency.

    Both amplifier stages have feedback independent of the stepped amplification regulation. Apart from a stepped regulation, amplifier allows for a linear amplification regulation in a limited range, especially useful in stereo operation.

    Amplifier needs external power supply. For individual operation ZW-31 is used, for multiple devices ZW-22 is used.
  • Net weight (2.2 lb = 1 kg)
  • 2.2 kg / 4 lb 13.5 oz (4.846 lb)
  • Literature/Schematics (1)
  • - - Manufacturers Literature (IV-1965)
  • Author
  • Model page created by Jacek Pekacik. See "Data change" for further contributors.

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