Tube-number record
TAL 12/35
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BrandPhilips
ClassTriode
BaseSpecial / none
Construction
Primary TypeTriode
EnvelopeMetal/Glass (External Anode)
SectionsSingle
Filament / Heater
MaterialTungsten
Absolute Maximum Ratings
Plate Voltage15000 V
Plate Dissipation18000 W
Grid 1 Voltage-1000 V
Cathode Current6000 mA
Audio Performance
Typical THD3.5%
Power Output80000 W
Key Features
- Forced air cooling
- Directly heated tungsten filament
- High power industrial triode
- Vertical mounting (anode down)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| H.F. class C telegraphy | 15000 V | 16500 | 1515 | 25 | 4200 mA |
| H.F. class B telephony | 15000 V | — | — | — | 1800 mA |
| H.F. class C anode modulation | 12000 V | — | — | — |
Application Notes
Special attention to anode and grid seal temperatures is required above 10 Mc/s. Grid seals can be cooled with caps 40632.
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