Tube-number record
U19
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BrandSFA
ClassHalf-wave Rectifier
Base4-pin
Construction
Primary TypeRectifier
Rectifier TypeVacuum
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialOxide coated
Warm-up Time20s
Absolute Maximum Ratings
Plate Voltage2500 V
Cathode Current250 mA
Audio Performance
Key Features
- Hard vacuum
- Directly heated filament
- Oxide coated filament
Application Notes
Recommended for output up to 500mA for a pair of valves in bi-phase circuit. For Peak Inverse Voltage exceeding 5,000V, filament should be switched on at least 20 seconds before anode voltage.
Datasheets
Datasheet: U19.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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