PP.3521
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BrandMazda
ClassAC/DC Mains Output Triode
Base7-pin
Filament35V @ 200mA
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesDesigned to operate at 0.2 amp series heater string.
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation15 W
Audio Performance
Typical THD5%
Power Output2.3 W
Key Features
- Indirectly heated triode
- Low impedance
- Designed for AC/DC mains receivers
- Large power output
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Single (Condition 1) | 200V | 10000 | 600 | 6 | 70mA |
| Single (Condition 2) | 175V | 10000 | 600 | 6 | 60mA |
| Push-Pull | 200V | 10000 | 600 | 6 | 140mA |
Application Notes
Each valve must be individually self-biased. A 360 ohm resistance should be inserted in each cathode lead and bypassed with a high-capacity condenser. Grid to cathode resistance must not exceed 150,000 ohms.
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