Tube-number record
9AK8
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BrandRogers Majestic Electronics Ltd.
ClassTriple Diode Triode
BaseNoval (B9A)
Filament9.5 V @ 300 mA
Construction
Primary TypeMulti-section
EnvelopeGlass
Base MaterialSmall button noval 9-pin
Sections4 (3 diodes + 1 triode)
Filament / Heater
Heater Notes9.5V 300mA series heater string
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation1 W
Grid 1 Voltage-1.3 V
Cathode Current5 mA
H-C Voltage150 V
Audio Performance
Key Features
- Triple diode triode structure
- Designed for video and audio signal detection
- Series heater string application
- Low microphonic triode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 100 V | 1300 | 54000 | 79 | 0.8 mA |
| Triode Section | 170 V | 1300 | 54000 | 70 | 1 mA |
| Triode Section | 200 V | 1250 | 56000 | 70 | 1 mA |
Datasheets
Datasheet: 9AK8.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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