Tube-number record
PL-6549
0 archive entries
PL-6549 is a tube type in the TubeDatabase archive (class: Power Pentode). Recorded specifications: brand Penta, construction Pentode, socket 7-pin (non-miniature), maximum plate voltage 2000 V, and maximum plate dissipation 75 W. The archive does not yet hold a photographed example of this type.
BrandPenta
ClassPower Pentode
Base7-pin (non-miniature)
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage2000 V
Plate Dissipation75 W
Grid 2 Voltage600 V
Grid 1 Voltage-125 V
Cathode Current175 mA
Audio Performance
Key Features
- Aligned-grid pentode
- Quick Heating
- High power sensitivity
- Thoriated Tungsten filament
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class-C CW or FM | 1000 V | 4500 | — | — | 150 mA |
| Class-AB1 Audio (Two Tubes) | 1000 V | — | — | — | 50 mA |
Application Notes
The PL-6549 is a 75-watt dissipation aligned-grid pentode featuring good performance at low plate voltage, but also capable of high voltage operation in medium-power applications. Suppressor grid permit screen voltages approaching plate voltage.
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