Tube-number record
8456
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BrandRCA
ClassMedium-Mu Triode
BaseSubminiature
Filament6 V @ — mA
Construction
Primary TypeTriode
EnvelopeMetal Shell MT4
Base MaterialCeramic
SectionsSingle
Filament / Heater
Heater NotesDesigned to operate within +/- 10% of any specified center voltage between 6.0 and 8.5V for battery supplies.
Absolute Maximum Ratings
Plate Voltage50 V
Plate Dissipation0.45 W
Grid 1 Voltage-55 V
Cathode Current15 mA
H-C Voltage100 V
Audio Performance
Key Features
- Nuvistor
- Low Voltage Operation
- Expendable Equipment Use
- Sonobuoy Application
- Metal Shell
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier (Cathode Bias) | 24 V | 7500 | 1530 | 11.5 | 8.7 mA |
| Class A Amplifier (Fixed Bias) | 12 V | 8000 | 1600 | 12 | 5 mA |
| Class A Amplifier (Fixed Bias) @ 24V | 24 V | 8000 | 1500 | 12 |
Application Notes
Specifically designed for sonobuoy and other expendable equipment requiring operation from battery supplies.
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