Tube-number record
4049-C
0 archive entries
4049-C is a tube type in the TubeDatabase archive (class: Half Wave Mercury Vapour Rectifier). Recorded specifications: brand Standard Valves, construction Rectifier, socket Screw / Edison base, and maximum plate voltage 10000 V. The archive does not yet hold a photographed example of this type.
BrandStandard Valves
ClassHalf Wave Mercury Vapour Rectifier
BaseScrew / Edison base
Construction
Primary TypeRectifier
Rectifier TypeHalf-wave
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialOxide coated filament (shielded)
Warm-up Time1.5s
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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