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

Other (3,257 tube types), Pre (2,314 tube types), Power (1,030 tube types), Rectifier (740 tube types)
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Tube-number record

NL-618

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BrandNational Electronics, Inc.
ClassInert-Gas-Filled Rectifier
Base4-pin

Construction

Primary TypeRectifier
Rectifier TypeXenon-filled
EnvelopeGlass
Base MaterialStandard, Lug, or Bracket
SectionsSingle

Filament / Heater

MaterialCoated
Warm-up Time60s

Absolute Maximum Ratings

Plate Voltage900 V
Cathode Current6400 mA
H-C Voltage1500 V

Audio Performance

Key Features
  • Inert-gas-filled
  • Xenon-filled
  • Wide temperature limits
  • Sturdy rectifier
  • Available in panel mounting bracket base (NL-618P)
  • Available in lug type base (NL-618L)

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Rectifier9 V———20000 mA

Application Notes

Designed especially for industrial power rectifier and control applications. Light filament before applying load.

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