Tube-number record
PL-6580
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BrandPenta Laboratories, Inc.
ClassHigh-mu power triode
Base5-pin
Construction
Primary TypeTriode
EnvelopeGlass
Base MaterialMetal Shell
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage4000 V
Plate Dissipation400 W
Cathode Current350 mA
Audio Performance
Key Features
- Forced air cooling of base and seals required
- High amplification factor
- High perveance
- Effective shielding provided
- Thoriated Tungsten filament
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C C-W or FM Amplifier (Grounded-Grid) | 4000 V | 6500 | — | 45 | 350 mA |
| Class B Linear R-F Amplifier (SSB) | 4000 V | 6500 | — | 45 | 300 mA |
Application Notes
The PL-6580 is especially suited for use as a grounded-grid radio-frequency amplifier. Neutralization is not required in ordinary grounded-grid applications due to low plate-to-filament capacitance.
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