Tube-number record
SR-50
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BrandWestinghouse
ClassPhototube
Base4-pin
Construction
Primary TypeVacuum
EnvelopeGlass
Filament / Heater
Absolute Maximum Ratings
Plate Voltage500 V
Cathode Current0.02 mA
Audio Performance
Key Features
- High instantaneous speed of response
- Semi-cylindrical cathode
- Axial wire anode
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