Tube-number record
6A4/LA
0 archive entries
6A4/LA is a tube type in the TubeDatabase archive (class: Pentode Power Amplifier). Recorded specifications: brand TUNG-SOL, year 1940, construction Pentode, socket 5-pin, and maximum plate voltage 180 V. The archive does not yet hold a photographed example of this type.
BrandTUNG-SOL
ClassPentode Power Amplifier
Base5-pin
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialCoated
Absolute Maximum Ratings
Plate Voltage180 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 135 V | 1900 | 52600 | 100 | 14 mA |
| Class A1 Amplifier | 180 V | 2200 | 45500 | 100 | 22 mA |
Application Notes
Grid voltage measured from negative end of DC operated filament. If the filament is AC operated, the tabulated values of grid voltage should be increased by 4.5 volts, and they should be referred to the mid-point of the filament.
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