Neutrosonic Short Wave

Igranic Electric Co. Ltd.; Bedford

Dati
Forum
Immagini
Collezioni

  • Anno
  • 1929
  • Categoria
  • Radio (o sintonizzatore del dopoguerra WW2)
  • Radiomuseum.org ID
  • 182876

Clicca sulla miniatura dello schema per richiederlo come documento gratuito.

 Specifiche tecniche

  • Numero di tubi
  • 6
  • Principio generale
  • Supereterodina con reazione; ZF/IF 48 kHz; A valvole con griglia schermo (solo se 1926-1935)
  • Gamme d'onda
  • Onde corte (solamente OC)
  • Tensioni di funzionamento
  • Batterie (di accumulatori e/o a secco)
  • Altoparlante
  • - Questo apparecchio richiede altoparlante/i esterno/i.
  • Materiali
  • Mobile in legno
  • Radiomuseum.org
  • Modello: Neutrosonic Short Wave - Igranic Electric Co. Ltd.;
  • Forma
  • Soprammobile a leggio (pannello inclinato).
  • Annotazioni

  • The Superheterodyne Principle to Shortwave Reception was described in Wireless World in January 1930.

    The article discusses a new radio receiver from Igranic that uses the superheterodyne principle to receive shortwave signals effectively.

    Key points:

    • The superheterodyne principle is used to convert the incoming frequency to a lower value for easier amplification, particularly for frequencies below 100 metres.
    • Igranic's set demonstrates good control over these high frequencies, functioning down to 15 metres.
    • The set uses an aperiodic aerial circuit, avoiding the problems of harmonics and blind spots encountered with tuned circuits.
    • A screen-grid valve acts as a buffer between the aerial and oscillator, improving stability and allowing for longer aerials.
    • The set features a single tuning dial and a slow-motion control for reaction, simplifying operation.
    • Four sets of coils cover the entire range (12.5 to 70 metres) with overlapping bands for finer tuning.
    • The intermediate-frequency amplifier operates at a higher wavelength (6,250 metres) for easier tuning and to avoid confusion with other stations.
    • Reaction is introduced in the I.F. amplifier, providing stable control and minimizing adjustments.
    • The set delivers strong audio output, eliminating the need for headphones.
    • Overall, the Igranic radio receiver appears to be a well-designed and effective solution for shortwave reception, offering advantages in stability, ease of use, and performance.

    The price in oak, including valves, coils and royalties, but excluding batteries and loudspeaker, is £28.

  • Prezzo nel primo anno
  • 28.00 GBP
  • Autore
  • Modello inviato da Roy Johnson. Utilizzare "Proponi modifica" per inviare ulteriori dati.

 Collezioni | Musei | Letteratura

 Forum