Tube-number record
12CT8
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BrandGeneral Electric
ClassTriode-Pentode
BaseNoval (B9A)
Filament12.6 V @ 300 mA
Construction
Primary TypeOther / special
EnvelopeT-6 1/4
SectionsTriode, Pentode
Filament / Heater
Warm-up Time11s
Heater NotesControlled heater warm-up characteristic for series-string operation.
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation2.75 W
Grid 2 Voltage300 V
H-C Voltage200 V
Audio Performance
Key Features
- Controlled heater warm-up
- Miniature construction
- Designed for low d-c supply voltages
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Section | 200 V | 7000 | 150000 | — | 15 mA |
| Triode Section | 150 V | 4900 | 8200 | 40 | 9 mA |
Application Notes
Pentode section designed for video amplifier service; triode section for sync amplifier, separator, clipper, or sweep oscillator.
Datasheets
Datasheet: 12CT8.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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