Tube-number record
NL-635
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BrandNational Electronics, Inc.
ClassRectifier Tube
Base4-pin
Construction
Primary TypeOther / special
Rectifier TypeHalf-wave
EnvelopeGlass
Base MaterialIndustrial
Sections1
Filament / Heater
Warm-up Time60s
Absolute Maximum Ratings
Plate Voltage1000 V
Cathode Current6400 mA
Audio Performance
Key Features
- Sturdy design
- Mercury and gas filled
- Withstands high inverse voltages
- Panel mounting bracket option (NL-635P)
- Lug type base option (NL-635L)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Rectifier | 9 V | — | — | — | 6400 mA |
Application Notes
Satisfactory operation will be obtained between -40 to +100C. For long life the tube should be operated between +40 to +100C condensed mercury. Light filament before applying load. All data based on returns to filament transformer center tap.
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