6BL7-GTA
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BrandGeneral Electric
ClassTwin Triode
BaseOctal
Filament6.3V @ 1500mA
Construction
Primary TypeTwin Triode
EnvelopeT-9
Base MaterialShort Intermediate-Shell Octal 8-Pin
Sections2
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage500 V
Plate Dissipation10 W
Grid 1 Voltage-250 V
Cathode Current60 mA
H-C Voltage200 V
Audio Performance
Key Features
- Twin triode for TV vertical-deflection oscillator and amplifier applications
- Interchangeable with 6BL7-GT
- Improved section 1 for increased life as an oscillator
- Controlled zero-bias plate current in both sections
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Each Section | 250V | 7000 | 2150 | 15 | 40mA |
| Zero Bias Condition | 150V | - | - | - | 65mA |
Application Notes
Section 1 is recommended for vertical oscillator service. For operation in a 525-line, 30-frame television system, duty cycle of the voltage pulse must not exceed 15 percent of one scanning cycle.
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