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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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27VP4 vacuum tube outline illustration

Tube-number record

27VP4

0 archive entries

27VP4 is a tube type in the TubeDatabase archive (class: Cathode Ray Tube). Recorded specifications: brand National Video Corporation, year 1957, construction Display / CRT, socket Duodecal, and maximum plate voltage 18000 V. The archive does not yet hold a photographed example of this type.

BrandNational Video Corporation
ClassCathode Ray Tube
BaseDuodecal
Filament6.3 V @ 600 mA

Construction

Primary TypeDisplay / CRT
EnvelopeGlass, rectangular
Sections1

Filament / Heater

Heater NotesPeak Heater-Cathode Voltage: 410V during warm-up, 180V operating

Absolute Maximum Ratings

Plate Voltage18000 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Typical Operating Conditions16000 V———0.1 mA

Application Notes

Shielding of x-ray radiation may be necessary if the anode is operated in excess of 16,000 volts.

Filters

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Manufacturers

Brands

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    Grid 2 Voltage500 V
    Grid 1 Voltage-140 V
    H-C Voltage180 V

    Audio Performance

    Key Features
    • Electrostatic focus
    • Magnetic deflection
    • 90 degree deflection angle
    • Gray glass faceplate
    • No ion-trap gun
    • Metal backed screen