Vacuum-Tube Voltmeter (Thermionic) 726-A 6Q7G

General Radio Company; Cambridge (MA)

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  • Anno
  • 1939
  • Categoria
  • Strumento da laboratorio
  • Radiomuseum.org ID
  • 279496
    • alternative name: GenRad

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 Specifiche tecniche

  • Numero di tubi
  • 3
  • Gamme d'onda
  • - senza
  • Tensioni di funzionamento
  • Alimentazione a corrente alternata (CA) / Less than 30 W, either 42, 50, 60 Hz, 100-130V or 50 Hz, 200 to 260 Volt
  • Altoparlante
  • - - Nessuna uscita audio.
  • Materiali
  • Mobile in legno
  • Radiomuseum.org
  • Modello: Vacuum-Tube Voltmeter 726-A [6Q7G] - General Radio Company;
  • Forma
  • Soprammobile a leggio (pannello inclinato).
  • Dimensioni (LxAxP)
  • 9.5 x 14 x 8.5 inch / 241 x 356 x 216 mm
  • Annotazioni

  • This instrument is listed with picture in the General Radio Co, "Catalog K" from 1939. Here you find the older version from 1936 with the tube type 75 instead of 6Q7G.

    Range 1.5 / 5 / 15 / 50 / 150 V AC, 20 Hz - 50 MHz; with a probe containing the 955 tube. Catalog 1939 mentions less than 1 % between 20 cycles and 50 megacycles. With the probe tips removed, at 100 megacycles the voltage indicated is about 3 % larger than accross heh probe terminals.

    Important: Open the probe head only on the "Low" end: The two screws and the Plug "low" to get to the tube 955.

    There are at least two versions regarding the tube line up: Early models (at least up to Serial Nr. 251) use the tube 75 (From Tungsram) with the 6-Pin-Base, which arrived on the market 1933 - and later sets use the 6Q7G from 1936 with Octal base. Since General Radio Copmpany-Catalog H from April 1935 does not mention the type 726-A (or 726), it is clear that the first introduction via catalog was in 1936. 

     

  • Peso netto
  • 17.5 lb (17 lb 8 oz) / 7.945 kg
  • Prezzo nel primo anno
  • 165.00 $
  • Letteratura / Schemi (1)
  • -- Original-techn. papers.
  • Letteratura / Schemi (2)
  • - - Manufacturers Literature (Catalog K from 1939 - on page 116.)
  • Autore
  • Modello inviato da Gottfried Silberhorn. Utilizzare "Proponi modifica" per inviare ulteriori dati.

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