Tube-number record
236A
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BrandWestern Electric
ClassPower Triode
BaseSpecial / none
Construction
Primary TypeTriode
EnvelopeWater-cooled glass/metal
SectionsSingle
Filament / Heater
MaterialTungsten
Absolute Maximum Ratings
Plate Voltage20000 V
Plate Dissipation20000 W
Grid 1 Voltage-600 V
Cathode Current2000 mA
Audio Performance
Typical THD5%
Power Output25000 W
Key Features
- Water-cooled anode
- Tungsten filament
- Suitable for high-power modulation
- Operation up to 12 MHz at reduced ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Average Characteristics | 15000 V | 6450 | 6200 | 40 | 1000 mA |
| Class B Audio (Max Drive) | 17500 V | — | 3250 | — | 1250 mA |
| Class C RF Unmodulated | 12000 V | — | — | — | 1500 mA |
Application Notes
The tube should be mounted only in a vertical position with the anode end down. Distilled water is recommended for the cooling system. Water flow must not be less than 7 gallons per minute. Overload protection should be set to 2.5 amperes.
Datasheets
Datasheet: 236A.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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