PY33
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BrandMullard
ClassHalf-wave rectifier
BaseOctal
Filament29V @ 300mA
Construction
Primary TypeIndirectly-heated
Rectifier TypeHalf-wave
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesSuitable for series operation, a.c. or d.c.
Absolute Maximum Ratings
Plate Voltage250 V
Cathode Current325 mA
H-C Voltage625 V
Audio Performance
Key Features
- Indirectly-heated
- Series connected heaters
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Half-wave rectifier | 250V | - | 25 | - | 220mA |
| Half-wave rectifier | 200V | - | 15 | - | 325mA |
Application Notes
For television receivers where a constant output voltage is required for different input voltages.
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