6842
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BrandNational Union
ClassHigh Voltage Regulator Tube
Base7-pin miniature
Filament6.3V @ 150mA
Construction
Primary TypeSharp-cutoff pentode
EnvelopeT-5 1/2
Base MaterialSkirted Miniature
SectionsSingle
Filament / Heater
Heater Notes6.3 Volts +/- 10%
Absolute Maximum Ratings
Plate Voltage4000 V
Plate Dissipation8 W
Grid 2 Voltage150 V
Grid 1 Voltage-100 V
Cathode Current10 mA
H-C Voltage300 V
Audio Performance
Key Features
- Low capacities
- High gain
- High voltage ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Operation - Case 1 | 500V | 2250 | 930000 | - | 3.5mA |
| Class A Operation - Case 2 | 1000V | 2400 | 930000 | - | 4mA |
| Class A Operation - Case 3 | 1500V | 2500 | 930000 | - | 4.5mA |
| Shunt Regulator | 500V | - | 15000 | - | 6mA |
Application Notes
Designed for use in regulated power supplies or voltage amplifiers operating at plate potentials between 300 V and 4 kV. Particularly useful as a shunt or series regulator in equipment requiring stabilized output voltage. Also well suited for sweep circuits employing electrostatic deflection. Current limiting series impedance must be used if peak voltage exceeds maximum ratings.
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