Tube-number record
4030-A
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4030-A is a tube type in the TubeDatabase archive (class: Double Ended Water Cooled Triode). Recorded specifications: brand Standard Valves, construction Triode, maximum plate voltage 17500 V, and maximum plate dissipation 80000 W. The archive does not yet hold a photographed example of this type.
BrandStandard Valves
ClassDouble Ended Water Cooled Triode
Construction
Primary TypeTriode
EnvelopeWater Cooled Jacket
SectionsSingle
Filament / Heater
MaterialPure Tungsten
Absolute Maximum Ratings
Plate Voltage17500 V
Plate Dissipation80000 W
Cathode Current11000 mA
Audio Performance
Power Output90000 W
Key Features
- Water cooled
- Double ended construction
- Pure tungsten cathode
- Constant voltage filament
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class B A.F. Amp. and Mod. (per valve) | 12500 V | 16363.6 | 2200 | 36 | 6500 mA |
| Class B Telephony (RF) | 17000 V | 16363.6 | 2200 | 36 | 4800 mA |
| Class C Telegraphy | 17500 V | 16363.6 | 2200 | 36 |
Application Notes
Exact filament voltage marked on bulb. High frequency operation allows up to 22 Mc at reduced anode voltage (15,000 V).
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