8524
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BrandToshiba
ClassSharp-Cutoff Pentode
Base8-pin subminiature (E8-9 ceramic)
Filament6.3V @ 150mA
Construction
Primary TypePentode
EnvelopeMetal Shell
Base MaterialCeramic
SectionsSingle
Filament / Heater
Heater NotesCoated unipotential cathode
Absolute Maximum Ratings
Plate Voltage165 V
Plate Dissipation0.55 W
Grid 2 Voltage155 V
Grid 1 Voltage-55 V
Cathode Current11 mA
H-C Voltage200 V
Audio Performance
Key Features
- Micro metal miniature construction
- Sharp-cutoff pentode
- Vibration and shock resistant
- Cutoff emission stability
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier (G3 to Cathode) | 100V | 3200 | 110000 | - | 5.3mA |
| Class A1 Amplifier (G3 at -1V) | 100V | 1950 | 50000 | - | 4mA |
| Mixer Operation | 100V | 1280 | 320000 | - | 3.5mA |
Application Notes
Designed for use in gated amplifier circuits, delay circuits, mixer circuits up to 400 Mc/s, and gain controlled amplifier circuits in military and critical industrial applications.
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