Tube-number record
27WP4
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BrandMatsushita
ClassCathode Ray Tube
BaseDuodecal
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
EnvelopeJ171
Base MaterialPlastic
Sections1
Filament / Heater
Heater Notes0.3 amp
Absolute Maximum Ratings
Plate Voltage20000 V
Grid 2 Voltage500 V
Grid 1 Voltage-125 V
H-C Voltage200 V
Audio Performance
Key Features
- Direct view picture tube
- Aluminized P4 screen
- Electrostatic focusing
- Magnetic deflection
- Ion trap
- External conductive coating
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical | 18000 V | — | — | — | — |
Application Notes
Registration Data Dec 18, 1956. High brightness filterglass screen.
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