TY4-500
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BrandMullard
ClassV.H.F. Power Triode
Construction
Primary TypeTriode
EnvelopeAll-glass
Base MaterialGlass
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage4000 V
Plate Dissipation450 W
Cathode Current650 mA
Audio Performance
Typical THD5%
Power Output2440 W
Key Features
- All-glass triode
- Thoriated tungsten filament
- Suitable for use up to 120 Mc/s
- Radiation cooling below 50 Mc/s
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| R.F. Power Amplifier (Class C Telegraphy) | 4000V | 4500 | - | 28 | 535mA |
| R.F. Power Amplifier (Class C Anode Modulation) | 3000V | 4500 | - | 28 | 450mA |
| A.F. Class B Amplifier (2 valves) | 4000V | 4500 | - | 28 | 736mA |
Application Notes
To ensure equal distribution of the currents through the seals the grid leads should be strapped together at the valve holder and the circuit connections joined to the midpoint of the strap. Above 50 Mc/s, a low velocity flow of air may be required on the anode seal and base.
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