4049-C
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BrandStandard Valves
ClassHalf Wave Mercury Vapour Rectifier
BaseEdison screw Goliath
Construction
Primary TypeHalf wave hot cathode mercury vapour rectifier
Rectifier TypeHalf-wave
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialOxide coated filament (shielded)
Warm-up Time1.5s
Absolute Maximum Ratings
Plate Voltage10000 V
Cathode Current5000 mA
Audio Performance
Key Features
- Half wave
- Hot cathode
- Mercury vapour
- Shielded filament
- Constant voltage type cathode
Application Notes
After shipment the filament must be run at full voltage for 30 minutes, before any anode voltage is applied. This rectifier being directly heated, the output circuit must be connected to the mid-point of the filament transformer. The filament transformer should be so connected that the anode and filament voltages are 90 degrees out of phase. Maximum current should be reduced by 50% if quadrature operation is not possible.
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