Tube-number record
PL-8295/PL-172
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BrandPenta Laboratories
ClassBeam Pentode
Base7-pin (non-miniature)
Filament6 V @ 3.2 mA
Construction
Primary TypeBeam tetrode / beam power
EnvelopeGlass
Base MaterialMetal/Ceramic
SectionsSingle
Filament / Heater
Heater NotesMinimum cathode heating time recommended before applying plate voltage.
Absolute Maximum Ratings
Plate Voltage3000 V
Plate Dissipation1000 W
Grid 2 Voltage600 V
Grid 1 Voltage-200 V
Cathode Current1000 mA
Audio Performance
Power Output1500 W
Key Features
- Forced-air cooled
- 1000-watt plate dissipation
- High power gain
- Low plate voltage efficiency
- Low-distortion linear r-f amplification
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class AB1 Linear R-F Amplifier | 3000 V | 23000 | — | 3.4 | 800 mA |
| Class C CW or FM Amplifier | 3000 V | — | — | — | 820 mA |
Application Notes
The tube is particularly well suited for low-distortion Class-AB1 linear r-f amplifier service. It should be supported by either the suppressor grid terminal ring or the anode cooler; do not support by glass or pins.
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