Tube-number record
NL-643
0 archive entries
NL-643 is a tube type in the TubeDatabase archive (class: Rectifier Tube). Recorded specifications: brand National Electronics, Inc., construction Rectifier, socket Special / none, and maximum plate voltage 700 V. The archive does not yet hold a photographed example of this type.
BrandNational Electronics, Inc.
ClassRectifier Tube
BaseSpecial / none
Construction
Primary TypeRectifier
Rectifier TypeHalf-wave
EnvelopeGlass
Filament / Heater
Warm-up Time120s
Absolute Maximum Ratings
Plate Voltage700 V
Cathode Current15000 mA
Audio Performance
Key Features
- Mercury filled for efficiency
- Designed for industrial power rectifier applications
- Ability to withstand high inverse voltage
- Sturdy construction
0 results