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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

20AP1, 20AP2, 20AP4, 20AP5

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BrandDu Mont
ClassCathode-Ray Tube
BaseCRT base (B12 family)
Filament2.5 V @ 2100 mA

Construction

Primary TypeDisplay / CRT
EnvelopeGlass
SectionsSingle

Filament / Heater

Heater NotesHeater current tolerance is +/- 0.3 A

Absolute Maximum Ratings

Plate Voltage4000 V

Audio Performance

Key Features
  • Designed for television and large screen applications
  • Specially designed bulb to withstand atmospheric pressure
  • Tested under pressure greater than three atmospheres
  • High accelerating potentials

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Operation 12000 V————
Operation 24000 V————

Application Notes

The tube can be mounted in any position. A protective plate glass is recommended in front of the screen for safety in television receivers.

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