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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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7AH7 vacuum tube outline illustration

Tube-number record

7AH7

0 archive entries

7AH7 is a tube type in the TubeDatabase archive (class: Pentode). Recorded specifications: brand Tung-Sol, year 1948, construction Pentode, socket Loctal, maximum plate voltage 300 V, and maximum plate dissipation 2 W. The archive does not yet hold a photographed example of this type.

BrandTung-Sol
ClassPentode
BaseLoctal
Filament6.3 V @ 150 mA

Construction

Primary TypePentode
EnvelopeGlass
SectionsSingle

Filament / Heater

Heater NotesAC or DC

Absolute Maximum Ratings

Plate Voltage300 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Class A1 Amplifier250 V44001000000—6.8 mA

Application Notes

The 7AH7 is characterized by moderately high transconductance and low interelectrode capacitances. Bias voltage is approximately 2 volts, but fixed bias is not recommended.

Filters

0 tubes found

Manufacturers

Brands

    0 results
    Plate Dissipation
    2 W
    Grid 2 Voltage300 V
    Grid 1 Voltage-1 V
    H-C Voltage90 V

    Audio Performance

    Key Features
    • Semi-remote cut-off pentode
    • Lock-in construction
    • High transconductance
    • Low interelectrode capacitances
    • Economy of heater power