Tube-number record
PP.3/250
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BrandMazda
ClassOutput Triode
Base4-pin
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation15 W
Audio Performance
Typical THD5%
Power Output4.2 W
Key Features
- Directly heated power triode
- Primarily for A.C. receivers
- Standard 4-pin base
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Single (A.C. Heating) | 250 V | 5000 | 1200 | 6.5 | 42 mA |
| Single (A.C. Heating) | 250 V | 5400 | 1150 | 6.5 | 50 mA |
| Single (A.C. Heating) | 300 V | 5400 | 1200 | 6.5 | 48 mA |
Application Notes
It is recommended that the bias voltage be obtained by means of a self-bias circuit, the resistance being by-passed with a large condenser (50 mfd). Grid-filament circuit resistance should not exceed 0.5 megohm at 12W dissipation or 0.25 megohm at 15W dissipation with self-bias.
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