Tube-number record
NL-5558/FG-32
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BrandNational Electronics
ClassMercury Vapor Rectifier
Base4-pin
Filament5 V @ 4.5 mA
Construction
Primary TypeRectifier
Rectifier TypeHalf-wave
EnvelopeGlass
Sections1
Filament / Heater
Warm-up Time300s
Heater NotesIndirectly heated cathode
Absolute Maximum Ratings
Plate Voltage5000 V
Cathode Current2500 mA
Audio Performance
Key Features
- Mercury filled
- Industrial power applications
- Sturdy construction
- High inverse voltage capability
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Arc Drop | 12 V | — | — | — | 10000 mA |
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