Tube-number record
ESU.303
0 archive entries
ESU.303 is a tube type in the TubeDatabase archive (class: Half-wave Mercury Vapour Rectifier). Recorded specifications: brand EDISWAN, year 1948, construction Rectifier, socket G.E.S., and maximum plate voltage 14000 V. The archive does not yet hold a photographed example of this type.
BrandEDISWAN
ClassHalf-wave Mercury Vapour Rectifier
BaseG.E.S.
Construction
Primary TypeRectifier
Rectifier TypeMercury Vapour
EnvelopeGlass
Sections1
Filament / Heater
Warm-up Time60s
Absolute Maximum Ratings
Plate Voltage14000 V
Cathode Current750 mA
Audio Performance
Key Features
- Hot cathode
- Mercury vapour
- Half-wave
Application Notes
Care must be taken in installation to ensure free circulation of air around the bulb in order that the temperature limits are not exceeded. When the rectifier is first placed in service the filament should be operated at normal voltage for 15 minutes without anode voltage in order to obtain correct distribution of mercury.
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