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Tube Database (7,341 tube types · 1,270 archive entries)

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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TWIN PENTODE vacuum tube outline illustration

Tube-number record

TWIN PENTODE

0 archive entries

TWIN PENTODE is a tube type in the TubeDatabase archive (class: Combined Sync-AGC Tube). Recorded specifications: brand Tung-Sol, year 1963, construction Pentode, base Glass Button, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 1.1 W. The archive does not yet hold a photographed example of this type.

BrandTung-Sol
ClassCombined Sync-AGC Tube
BaseNoval (B9A)
Filament4.2 V @ 450 mA

Construction

Primary TypePentode
EnvelopeGlass
Base MaterialGlass Button
Sections2

Filament / Heater

Warm-up Time11s
Heater NotesAC or DC, Controlled warm-up

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Both Sections Operating100 V180——2.2 mA
Each Section Separately100 V500——2.2 mA

Filters

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Manufacturers

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    Absolute Maximum Ratings

    Plate Voltage300 V
    Plate Dissipation1.1 W
    Grid 2 Voltage150 V
    Grid 1 Voltage50 V
    Cathode Current12 mA
    H-C Voltage200 V

    Audio Performance

    Key Features
    • Miniature multisection tube
    • Separate plates and grid 3s
    • Common screen grid (G2)
    • Common cathode
    • Common G1 (G4)
    • Thermal characteristics controlled for series strings