Tube-number record
4228-A
0 archive entries
4228-A is a tube type in the TubeDatabase archive (class: Single Ended Water Cooled Triode). Recorded specifications: brand Standard Valves, construction Triode, socket Special / none, maximum plate voltage 6000 V, and maximum plate dissipation 5000 W. The archive does not yet hold a photographed example of this type.
BrandStandard Valves
ClassSingle Ended Water Cooled Triode
BaseSpecial / none
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialPure Tungsten
Absolute Maximum Ratings
Plate Voltage6000 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class B AF Amp | 5000 V | 8181.8 | 2200 | 18 | 150 mA |
| Class C Telegraphy | 6000 V | 8181.8 | 2200 | 18 | 1250 mA |
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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