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Tube Database (7,341 tube types · 1,270 archive entries)

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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NL-604 vacuum tube outline illustration

Tube-number record

NL-604

0 archive entries

NL-604 is a tube type in the TubeDatabase archive (class: Full-wave Rectifier Tube). Recorded specifications: brand National Electronics, Inc., construction Gas and mercury filled, socket Special / none, and maximum plate voltage 900 V. The archive does not yet hold a photographed example of this type.

BrandNational Electronics, Inc.
ClassFull-wave Rectifier Tube
BaseSpecial / none

Construction

Primary TypeGas and mercury filled
Rectifier TypeFull-wave
EnvelopeGlass
SectionsDouble Anode

Filament / Heater

MaterialMercury-vapor/Gas
Warm-up Time15s

Application Notes

Designed especially for industrial power rectifier applications up to 250 volts dc. Light filament before applying load. All data based on returns to filament transformer center tap.

Filters

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Manufacturers

Brands

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    Absolute Maximum Ratings

    Plate Voltage900 V
    Cathode Current2500 mA

    Audio Performance

    Key Features
    • Gas and mercury filled
    • Quick starting
    • Long life
    • Constancy of characteristics within wide temperature limits
    • Sturdy industrial design