Tube-number record
PL3-500ZG
0 archive entries
PL3-500ZG is a tube type in the TubeDatabase archive (class: Power Triode). Recorded specifications: brand Penta Laboratories, construction Triode, socket Special / none, maximum plate voltage 4000 V, and maximum plate dissipation 500 W. The archive does not yet hold a photographed example of this type.
BrandPenta Laboratories
ClassPower Triode
BaseSpecial / none
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage4000 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Cathode Driven RF Linear Amplifier | 2500 V | — | — | 130 | 400 mA |
| Cathode Driven RF Linear Amplifier (High Voltage) | 3500 V | — | — | 130 | 400 mA |
| Grid Driven RF Power Amplifier | 3000 V | — | — | 130 |
Application Notes
Forced air cooling of the base, base seals, envelope, plate seal, and plate connector is required for all classes of operation when the PL3-500ZG is operated at or near the maximum plate dissipation rating. Zero-bias operation is not recommended at plate voltages exceeding 2500 volts.
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