T-R Switch 250-39

Johnson Company, E.F.; Waseca, MN

Dati
Forum
Immagini
Collezioni

  • Anno
  • 1963 ??
  • Categoria
  • Altro apparecchio amatoriale (ma non tasto Morse) 
  • Radiomuseum.org ID
  • 265988
    • Brand: Viking

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 Specifiche tecniche

  • Numero di tubi
  • 2
  • Principio generale
  • Apparecchiatura speciale (descrivere nelle note)
  • Gamme d'onda
  • Onde corte (solamente OC)
  • Tensioni di funzionamento
  • Alimentazione a corrente alternata (CA) / 110-120 Volt
  • Altoparlante
  • - - Nessuna uscita audio.
  • Materiali
  • Mobile di metallo
  • Radiomuseum.org
  • Modello: T-R Switch 250-39 - Johnson Company, E.F.; Waseca,
  • Forma
  • Soprammobile compatto/con bordi arrotondati/midget senza pulsantiera/tastiera.<= 35 cm (Sometimes with handle but for mains only).
  • Dimensioni (LxAxP)
  • 4.25 x 4.375 x 5.375 inch / 108 x 111 x 137 mm
  • Annotazioni

  • The E.F. Johnson T-R Switch 250-39 is a compact electronic T-R switch with transmitter pass-through and receiver output, using three SO-239 (UHF) connectors. Power rating 1KW carrier and 4KW PEP. 2-30MHz. Gain 2dB@30MHz, 6dB@3.5MHz. A 6BL7 dual Triode is used as a broadband voltage amplifier followed by Cathode folllower stage which limits output to a separately muted receiver. Instant break-in. Tip jack on panel for monitoring by oscilloscope. It has no external controls.

    Editors notes: This product is designed for use with tube type receivers. Use extreme caution when using a solid state receiver because the RF signal at the receive port may be high enough to damage sensitive transistor inputs of receivers. The user should take steps to control this. The TR switch is intended to be used with the receiver on the same frequency as the transmitter. Because this TR switch is left in-line with the transmitter output and any antenna tuner, the tuning circuits in those equipments may reduce the gain at frequencies to which they are not resonated. On the other hand, the TR switch has a high impedance input and works well as a broadband buffer with gain when no additional resonating circuits are connected. The cabinet normally runs very warm.

  • Peso netto
  • 4 lb (4 lb 0 oz) / 1.816 kg
  • Prezzo nel primo anno
  • 29.95 USD
  • Autore
  • Modello inviato da Patrick Jankowiak. Utilizzare "Proponi modifica" per inviare ulteriori dati.

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