Tube-number record
PB 2/500
0 archive entries
PB 2/500 is a tube type in the TubeDatabase archive (class: Pentode). Recorded specifications: brand Philips, construction Pentode, maximum plate voltage 2500 V, and maximum plate dissipation 250 W. The archive does not yet hold a photographed example of this type.
BrandPhilips
ClassPentode
Construction
Primary TypePentode
EnvelopeGlass
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage2500 V
Plate Dissipation250 W
Grid 2 Voltage500 V
Cathode Current600 mA
Audio Performance
Key Features
- H.F. amplifier
- Thoriated tungsten cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| H.F. class C telegraphy | 2500 V | 6000 | — | 6.2 | 340 mA |
| H.F. class B telephony | 2000 V | — | — | — | 170 mA |
| H.F. class C anode modulation | 2000 V | — | — | — | 215 mA |
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