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

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27LP4 vacuum tube outline illustration

Tube-number record

27LP4

0 archive entries

27LP4 is a tube type in the TubeDatabase archive (class: Television Picture Tube). Recorded specifications: brand Sylvania, construction Display / CRT, socket CRT base (B7 family), and maximum plate voltage 22000 V. The archive does not yet hold a photographed example of this type.

BrandSylvania
ClassTelevision Picture Tube
BaseCRT base (B7 family)
Filament6.3 V @ 600 mA

Construction

Primary TypeDisplay / CRT
EnvelopeGlass
Sections1

Filament / Heater

MaterialAluminized P4
Warm-up Time11s
Heater NotesHeater warm-up time defined as time to reach 80% of rated voltage under specified test conditions.

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Grid Drive Service18000 V—1500000——

Application Notes

X-ray radiation shielding may be necessary to protect against possible danger of personal injury from prolonged exposure if operated above 16,000V.

Datasheets

Datasheet: 27LP4.pdf

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

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    Absolute Maximum Ratings

    Plate Voltage22000 V
    Grid 2 Voltage550 V
    Grid 1 Voltage-155 V
    H-C Voltage200 V

    Audio Performance

    Key Features
    • Electrostatic Focus
    • Magnetic Deflection
    • Aluminized Screen
    • No Ion Trap
    • Gray Filter Glass
    • Spherical Faceplate