UY 21
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ClassRectifier
BaseLoctal
Filament50V @ 100mA
Construction
Primary Typehigh vacuum
Rectifier Typesingle-phase
Envelopeglass
Base Materialmetal/glass
Sectionssingle
Filament / Heater
Heater NotesIndirect heating, series string 100 mA
Absolute Maximum Ratings
Plate Voltage250 V
Cathode Current140 mA
H-C Voltage550 V
Audio Performance
Key Features
- Indirectly heated
- Single phase rectifier
- Designed for 100mA series heater chains
- High vacuum
Application Notes
Used in AC/DC radio receivers, particularly those requiring high current for push-pull output stages like EBL 21.
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