TubeDatabase
  • Tubes
  • Testers
  • Companies
  • Submit
  • About

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)
DisclaimerA–Z indexSubmit a tube
27UP4 vacuum tube outline illustration

Tube-number record

27UP4

0 archive entries

27UP4 is a tube type in the TubeDatabase archive (class: Cathode Ray Tube). Recorded specifications: brand National Video Corporation, year 1955, construction Display / CRT, socket CRT base (B12 family), and maximum plate voltage 20000 V. The archive does not yet hold a photographed example of this type.

BrandNational Video Corporation
ClassCathode Ray Tube
BaseCRT base (B12 family)
Filament6.3 V @ 0.6 mA

Construction

Primary TypeDisplay / CRT
EnvelopeGlass
Sections1

Filament / Heater

Heater NotesIndirectly heated cathode

Absolute Maximum Ratings

Plate Voltage20000 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Direct View Picture16000 V———0.1 mA

Application Notes

Shielding of x-ray radiation may be necessary when operated in excess of 16 kilovolts. Grid number four is the focus control electrode.

Filters

0 tubes found

Manufacturers

Brands

    0 results
    Grid 2 Voltage500 V
    Grid 1 Voltage-125 V
    H-C Voltage180 V

    Audio Performance

    Key Features
    • Electrostatic focus
    • Magnetic deflection
    • Rectangular glass bulb
    • Gray glass faceplate
    • External ion-trap magnet required