Tube-number record
POWER AMPLIFIER PENTODE
0 archive entries
POWER AMPLIFIER PENTODE is a tube type in the TubeDatabase archive (class: Output Tube). Recorded specifications: brand TUNG-SOL, year 1947, construction Pentode, base Button, socket Miniature 7-pin (B7G), and maximum plate voltage 90 V. The archive does not yet hold a photographed example of this type.
BrandTUNG-SOL
ClassOutput Tube
BaseMiniature 7-pin (B7G)
Construction
Primary TypePentode
EnvelopeGlass Bulb
Base MaterialButton
SectionsSingle
Filament / Heater
MaterialCoated
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 45 V | 1250 | 100000 | — | 3.8 mA |
| Class A1 Amplifier | 67.5 V | 1550 | 100000 | — | 7.2 mA |
| Class A1 Amplifier | 90 V | 1575 | 100000 | — | 7.4 mA |
Application Notes
Especially designed for output service in compact, light-weight portable equipment. The high operating efficiency allows the tube to be used with extremely low B supply voltages.
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