Tube-number record
TA 18/100000
0 archive entries
TA 18/100000 is a tube type in the TubeDatabase archive (class: Transmitting Tube). Recorded specifications: brand Philips, construction Triode, maximum plate voltage 18000 V, and maximum plate dissipation 70000 W. The archive does not yet hold a photographed example of this type.
BrandPhilips
ClassTransmitting Tube
Construction
Primary TypeTriode
EnvelopeGlass/Metal
SectionsSingle
Filament / Heater
MaterialTungsten
Absolute Maximum Ratings
Plate Voltage18000 V
Plate Dissipation70000 W
Audio Performance
Key Features
- Water cooled anode (80 liters per minute)
- High power output up to 130 kW
- Suitable for wavelengths down to 150 m
- No air cooling required for grid or filament poles
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Telegraphy | 18000 V | 20000 | 2250 | 45 | 10500 mA |
| Telegraphy | 15000 V | — | — | — | 10000 mA |
| Amplifier Class B (100% Modulation) | 18000 V | — | — | — | 5600 mA |
Application Notes
Specifically designed for the final stage of large radio broadcast transmitters.
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