TY3-250
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BrandMullard
ClassV.H.F. Power Triode
BaseB5F
Construction
Primary TypeTriode
EnvelopeAll-glass
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage3000 V
Plate Dissipation250 W
Cathode Current480 mA
Audio Performance
Typical THD4.4%
Power Output1340 W
Key Features
- V.H.F. operation up to 150 Mc/s
- Thoriated tungsten filament
- All-glass construction
- High power triode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C Telegraphy/F.M. Telephony | 3000V | - | - | 25 | 365mA |
| Class B Telephony | 3000V | - | - | 25 | 130mA |
| Class C Anode Modulation | 2500V | - | - | 25 | 250mA |
Application Notes
In order to keep within the temperature limits it may be necessary to direct a flow of air on to the anode seal and the base of the valve when operated at frequencies above 30 Mc/s. Below 30 Mc/s radiation cooling from the envelope is sufficient but an anode terminal connection of large surface area is necessary.
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