Tube-number record
NL-660L/7786
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BrandNational Electronics, Inc.
ClassRectifier Tube
BaseSpecial / none
Construction
Primary TypeOther / special
Rectifier TypeHalf-wave
EnvelopeGlass
Base MaterialMetal
SectionsSingle
Filament / Heater
MaterialInert gas filled filamentary cathode
Warm-up Time60s
Absolute Maximum Ratings
Plate Voltage920 V
Cathode Current6400 mA
Audio Performance
Key Features
- Inert gas filled
- Quick starting
- High commutation factor
- National lug base
- Compact design
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Industrial Rectifier | 250 V | — | — | — | 6400 mA |
Application Notes
Sturdy rectifier tube designed especially for industrial power rectifier applications up to 250 volts dc. Particularly useful in circuits requiring high commutation factor.
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