40B2
0 Tubes in archive
BrandSylvania
ClassBallast Tube
BaseOctal 5-Pin
Construction
Primary TypeGas-filled ballast tube
EnvelopeT-9
Base MaterialIntermediate Shell Octal 5-Pin
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage60 V
Cathode Current160 mA
Audio Performance
Key Features
- Gas-filled
- Maintains relatively constant current over specified voltage range
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Operating Characteristic 1 | 20V | - | - | - | 140mA |
| Operating Characteristic 2 | 40V | - | - | - | 150mA |
| Operating Characteristic 3 | 60V | - | - | - | 155mA |
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