Tube-number record
27YP4
0 archive entries
27YP4 is a tube type in the TubeDatabase archive (class: Cathode Ray Tube). Recorded specifications: brand National Video Corporation, year 1962, construction Display / CRT, base Plastic, socket Duodecal, and maximum plate voltage 25000 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
Base MaterialPlastic
Sections1
Filament / Heater
Heater Notes600 milliampere filament used
Absolute Maximum Ratings
Plate Voltage25000 V
Grid 2 Voltage550 V
Grid 1 Voltage-154 V
H-C Voltage200 V
Audio Performance
Key Features
- Electrostatic focus
- Magnetic deflection
- Metal back screen
- Straight gun
- No ion trap required
- Aluminized P4 phosphor
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Grid Drive Service | 18000 V | — | — | — | 0.1 mA |
Application Notes
The 27YP4 is a 5 3/4" neck length, electrostatic focus, magnetic deflection picture tube with a Pittsburgh type implosion faceplate.
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