Tube-number record
ZM1250
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BrandMullard
ClassGas Discharge Dot Matrix Display Tube
BaseFlexible / flying leads
Construction
Primary TypeOther / special
EnvelopeFlat pack construction
Sections7 x 5 dot matrix plus decimal point
Filament / Heater
Absolute Maximum Ratings
Plate Voltage220 V
Plate Dissipation0.4 W
Cathode Current3 mA
Audio Performance
Key Features
- 7 x 5 dot matrix
- Separate left hand decimal point
- Bright clear wide-angle display
- Flat pack construction
- Suitable for unfavourable lighting conditions
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Dynamic or D.C. Drive | 140 V | — | — | — | 1.5 mA |
Application Notes
For envelope temperatures below +10°C the life expectancy of the tube is substantially reduced. It is recommended that a red (blue-light absorbing) filter be used, preferably of circularly polarised type. Tube may be soldered directly into a printed circuit board.
Datasheets
Datasheet: ZM1250.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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