Tube-number record
D7-190
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ClassInstrument cathode-ray tube
Base14-pin all-glass
Filament6.3 V @ 300 mA
Construction
Primary TypeDisplay / CRT
Envelope7 cm diameter flat faced
Base MaterialGlass
SectionsSingle
Filament / Heater
Heater NotesIndirect by AC or DC; 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
- Flat faced
- Monoaccelerator
- Symmetrical deflection plates
- Electrostatic focusing
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.
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