Tube-number record
6A4/LA
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BrandTUNG-SOL
ClassPentode Power Amplifier
Base5-pin
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialCoated
Absolute Maximum Ratings
Plate Voltage180 V
Grid 2 Voltage180 V
Audio Performance
Typical THD9%
Power Output1.4 W
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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