4228-A
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BrandStandard Valves
ClassSingle Ended Water Cooled Triode
BaseMS.1362 Water Jacket
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialPure Tungsten
Absolute Maximum Ratings
Plate Voltage6000 V
Plate Dissipation5000 W
Cathode Current1500 mA
Audio Performance
Power Output3750 W
Key Features
- Pure Tungsten filament
- Water cooled
- Constant voltage type filament
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class B AF Amp | 5000V | 8181.8 | 2200 | 18 | 150mA |
| Class C Telegraphy | 6000V | 8181.8 | 2200 | 18 | 1250mA |
Application Notes
The exact filament voltage is marked on the bulb. Maximum anode voltage for frequency of 6 Mc is 3,000 volts.
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