Tube-number record
D7-222GH
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BrandPhilips
ClassInstrument Cathode-Ray Tube
BaseCRT base (B12 family)
Filament6.3 V @ 240 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
Base MaterialGlass
SectionsSingle
Filament / Heater
Heater NotesIndirect heating; parallel supply
Absolute Maximum Ratings
Plate Voltage2200 V
Grid 2 Voltage2200 V
Grid 1 Voltage-200 V
H-C Voltage125 V
Audio Performance
Key Features
- Short warm-up time
- Quick-heating cathode
- Metal-backed phosphor
- Electrostatic focusing
- Double electrostatic deflection
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| standard | 1000 V | — | — | — | 0.01 mA |
Application Notes
Primarily intended for use in inexpensive oscilloscopes and monitoring devices. Features a 1.5 W cathode.
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