Microphone Amplifier 1 Type: GAI

Marconi Co. (Marconiphone, Marconi's Wireless Telegraph Co. Ltd.), GB (not tubes - see also HMV His Master's Voice)

Dati
Forum
Immagini
Collezioni

  • Anno
  • 1923 ?
  • Categoria
  • Amplificatore audio o mixer audio
  • Radiomuseum.org ID
  • 345041

 Specifiche tecniche

  • Numero di tubi
  • 5
  • Gamme d'onda
  • - senza
  • Tensioni di funzionamento
  • Fornita mediante altra unità o unità principale. / 6 / DC 300 Volt
  • Altoparlante
  • - Per cuffie o amplificatori esterni
  • Materiali
  • Mobile in legno
  • Radiomuseum.org
  • Modello: Microphone Amplifier 1 Type: GAI - Marconi Co. Marconiphone,
  • Forma
  • Soprammobile con qualsiasi forma (non saputo).
  • Dimensioni (LxAxP)
  • 625 x 405 x 300 mm / 24.6 x 15.9 x 11.8 inch
  • Annotazioni

  • Marconi Type GA1 single-channel, five-valve microphone amplifier, having resistance-capacitance interstage coupling with metal screening boxes over the valves.

    To reduce microphonic noises each valve was connected by gold plate contacts mounted on a sub-assembly and suspended by rubber bands, with flexible leads to the main circuits.

    The amplifier had provision for adjusting the high-frequency response to suit the acoustic properties of the hall the microphone was used in.

    This was the standard BBC microphone amplifier for several years.

    It operated from a 6 V filament supply and a 300 V HT supply.

  • Peso netto
  • 45.7 kg / 100 lb 10.6 oz (100.661 lb)
  • Bibliografia
  • -- Original prospect or advert (Microphone Engineering Handbook ISBN 0 7506 1199 5, Page 279)

 Collezioni | Musei | Letteratura

Collezioni

Il modello Microphone Amplifier 1 fa parte delle collezioni dei seguenti membri.

 Forum