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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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Tube-number record

21CLP4

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BrandRogers Electronic Tubes & Components
ClassTelevision Picture Tube
BaseCRT base (B7 family)
Filament6.3 V @ 300 mA

Construction

Primary TypeDisplay / CRT
EnvelopeJ171
SectionsSingle

Filament / Heater

Heater NotesSurge heater voltage must not exceed 9.5V rms; maximum warm-up surge 410V when heater is negative.

Absolute Maximum Ratings

Plate Voltage18000 V
Grid 2 Voltage500 V
Grid 1 Voltage-150 V
H-C Voltage200 V

Audio Performance

Key Features
  • Rectangular television picture tube
  • Filter glass
  • Metal-backed screen
  • Electrostatic focusing
  • 90° magnetic deflection
  • Ion trap

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Typical focusing condition 114000 V———0.1 mA
Typical focusing condition 216000 V———0.1 mA

Application Notes

The socket for the base should not be rigidly mounted; it should have flexible leads. Grid No. 3 and 5 voltage range for optimum focusing varies with anode voltage.

Filters

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