Tube-number record
50BM8
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ClassTriode-Pentode
BaseNoval (B9A)
Filament50 V @ 100 mA
Construction
Primary TypePentode
EnvelopeMiniature
Sections2
Filament / Heater
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation7 W
Grid 2 Voltage250 V
Cathode Current50 mA
H-C Voltage200 V
Audio Performance
Typical THD10%
Power Output1.05 W
Key Features
- Miniature type
- High-mu triode
- Power pentode
- AF amplifier
- AF power amplifier
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Unit | 100 V | 2500 | — | 70 | 3.5 mA |
| Pentode Unit | 100 V | 6800 | 15000 | — | 26 mA |
Application Notes
Designed for use as an AF amplifier (triode section) and AF power amplifier (pentode section) in radio receivers.
Datasheets
Datasheet: 50BM8.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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