Tube-number record
P 120-1
0 archive entries
P 120-1 is a tube type in the TubeDatabase archive (class: Radiation-Cooled Pentode). Recorded specifications: brand Brown Boveri, construction Pentode, base Medium-Shell Giant, socket 5-pin, maximum plate voltage 2000 V, and maximum plate dissipation 125 W. The archive does not yet hold a photographed example of this type.
BrandBrown Boveri
ClassRadiation-Cooled Pentode
Base5-pin
Construction
Primary TypePentode
EnvelopeGlass
Base MaterialMedium-Shell Giant
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class B AF Power Amplifier (2 tubes push-pull) | 2000 V | 4000 | — | 4 | 400 mA |
| Class C RF Amplifier without modulation (Max Power) | 2000 V | 4000 | — | 4 | 230 mA |
Application Notes
AF or RF amplifier with control-grid, anode- and screen-modulation. Driving power virtually zero.
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