Tube-number record
12HL7
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BrandGeneral Electric
ClassPentode
BaseNoval (B9A)
Filament6.3 V @ 600 mA
Construction
Primary TypePentode
EnvelopeT-6 1/2
Base MaterialGlass
SectionsSingle
Filament / Heater
Heater NotesParallel or Series operation; center tap available on Pin 6
Absolute Maximum Ratings
Plate Voltage400 V
Plate Dissipation10 W
Grid 2 Voltage330 V
H-C Voltage200 V
Audio Performance
Key Features
- Frame-grid construction
- Sharp-cutoff characteristics
- Designed for TV video amplifier applications
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Video Amplifier | 250 V | 21000 | 55000 | — | 25 mA |
Application Notes
Primary application is video amplifier service in color television receivers. Control grid to cathode spacing is extremely low, requiring care in testing.
Datasheets
Datasheet: 12HL7.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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