Tube-number record
SHARP CUT-OFF PENTODE VOLTAGE AMPLIFIER
0 archive entries
SHARP CUT-OFF PENTODE VOLTAGE AMPLIFIER is a tube type in the TubeDatabase archive (class: Pentode). Recorded specifications: brand Tung-Sol, year 1949, construction Pentode, base Lock-in 8-pin, socket Loctal, and maximum plate voltage 110 V. The archive does not yet hold a photographed example of this type.
BrandTung-Sol
ClassPentode
BaseLoctal
Construction
Primary TypePentode
EnvelopeGlass T9
Base MaterialLock-in 8-pin
Sections1
Filament / Heater
MaterialCoated
Absolute Maximum Ratings
Plate Voltage110 V
Grid 2 Voltage110 V
Audio Performance
Key Features
- Lock-in construction
- Filamentary type
- Sharp cut-off
- Any mounting position
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 90 V | 1150 | 500000 | — | 3.7 mA |
| Class A1 Amplifier | 90 V | 800 | 1000000 | — | 1.7 mA |
Application Notes
Particularly adaptable to portable receivers as an RF or IF amplifier where automatic volume control is not required.
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