Tube-number record
D14-400GH/123
0 archive entries
D14-400GH/123 is a tube type in the TubeDatabase archive (class: Instrument Cathode-Ray Tube). Recorded specifications: construction Display / CRT, base All glass, socket CRT base (B12 family), and maximum plate voltage 26000 V. The archive does not yet hold a photographed example of this type.
ClassInstrument Cathode-Ray Tube
BaseCRT base (B12 family)
Filament6.3 V @ 240 mA
Construction
Primary TypeDisplay / CRT
Envelope14 cm diagonal rectangular flat face
Base MaterialAll glass
SectionsSymmetrical helix system for vertical deflection
Filament / Heater
Heater NotesIndirect heating by a.c. or d.c.; quick-heating cathode (~5s)
Absolute Maximum Ratings
Plate Voltage26000 V
Grid 2 Voltage3400 V
Grid 1 Voltage-20 V
H-C Voltage125 V
Audio Performance
Key Features
- Domed mesh post-deflection acceleration
- Internal magnetic lens system
- Internal graticule
- Side contacts to deflection plates
- Quick-heating cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard Operation | 24000 V | — | 330 | — | — |
Application Notes
Designed for oscilloscopes with up to 500 MHz bandwidth. Includes internal correction for orthogonality, astigmatism, and eccentricity.
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