4274-A
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BrandStandard Valves
ClassFull Wave High Vacuum Rectifier
BaseAmerican medium 4-pin bayonet
Construction
Primary TypeRectifier
Rectifier TypeFull Wave
EnvelopeGlass
Sections2
Filament / Heater
MaterialOxide coated
Absolute Maximum Ratings
Plate Voltage660 V
Cathode Current200 mA
Audio Performance
Key Features
- Full wave thermionic
- High vacuum
- Oxide coated filament
- Constant voltage type filament
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Choke Input Filter (A) | 550V | - | - | - | 160mA |
| Condenser Input Filter (B) | 450V | - | - | - | 140mA |
Application Notes
Maximum input filter capacity for condenser input filter is 4 µF.
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