Tube-number record
27AP4
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BrandTung-Sol
ClassCathode Ray Tube
BaseDuodecal
Filament6.3 V @ 600 mA
Construction
Primary TypeDisplay / CRT
EnvelopeRectangular Metal
SectionsSingle
Filament / Heater
Heater NotesUnipotential Cathode
Absolute Maximum Ratings
Plate Voltage18000 V
Grid 2 Voltage500 V
Grid 1 Voltage-125 V
H-C Voltage180 V
Audio Performance
Key Features
- Electrostatic Focus
- Magnetic Deflection
- Grey Filter Faceplate
- Rectangular Metal Construction
- Unipotential Cathode
- External Single Field Ion Trap
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical | 15000 V | — | — | — | — |
Application Notes
The 27AP4 is a direct-view picture tube designed for use in television applications. Features include a grey filter faceplate and 23-7/16" x 18-1/8" raster size.
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