Tube-number record
HF PENTODE
0 archive entries
HF PENTODE is a tube type in the TubeDatabase archive (class: Variable-mu Pentode). Recorded specifications: brand TESLA, construction Pentode, socket Miniature 7-pin (B7G), maximum plate voltage 90 V, and maximum plate dissipation 0.35 W. The archive does not yet hold a photographed example of this type.
BrandTESLA
ClassVariable-mu Pentode
BaseMiniature 7-pin (B7G)
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialOxide-coated
Absolute Maximum Ratings
Plate Voltage90 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| HF/MF Amplifier (Standard) | 90 V | 750 | 500000 | 400 | 3.5 mA |
| Operation Point 1 | 45 V | 650 | 350000 | — | 1.7 mA |
| Operation Point 2 | 67.5 V | 750 | 250000 | — | 3.4 mA |
Application Notes
Suppressor grid is internally connected to the negative end of the filament.
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