Tube-number record
TA 18/100
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BrandPhilips
ClassTriode
Construction
Primary TypeTriode
EnvelopeGlass/Metal
SectionsSingle Section
Filament / Heater
MaterialTungsten
Absolute Maximum Ratings
Plate Voltage20000 V
Plate Dissipation70000 W
Grid 1 Voltage-900 V
Audio Performance
Key Features
- Water cooled
- High power transmitter triode
- Tungsten filament
- 80 l/min cooling flow
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| H.F. class C telegraphy | 20000 V | 20000 | — | 45 | 9000 mA |
| H.F. class C telegraphy (alt) | 18000 V | — | — | — | 9200 mA |
| H.F. class B telephony | 20000 V | — | — | — |
Application Notes
Used as an oscillator or H.F. amplifier. Requires water cooling with specific temperature and flow constraints (max 60 degrees C outlet).
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