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

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CK5889 vacuum tube outline illustration

Tube-number record

CK5889

0 archive entries

CK5889 is a tube type in the TubeDatabase archive (class: Subminiature Electrometer Pentode). Recorded specifications: brand Raytheon, year 1954, construction Pentode, base Glass, socket Subminiature, and maximum plate voltage 45 V. The archive does not yet hold a photographed example of this type.

BrandRaytheon
ClassSubminiature Electrometer Pentode
Base
Subminiature

Construction

Primary TypePentode
EnvelopeT-3 Glass
Base MaterialGlass
Sections1

Filament / Heater

Absolute Maximum Ratings

Plate Voltage45 V
Grid 2 Voltage45 V
Cathode Current0.3 mA

Audio Performance

Key Features
  • Low filament current
  • Electrometer performance
  • Control grid at top of bulb
  • Guard ring bonded to envelope

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Pentode12 V10—2500.004 mA
Triode10.5 V150——0.18 mA

Application Notes

The CK5889 is electrically similar to type CK5886 but with a lower filament current. Connection to the guard ring should be made by means of a spring clip or twisted wire lead. Continuous operation is recommended for exacting requirements.

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