Tube-number record
Z 561M / Z 5610M
0 archive entries
Z 561M / Z 5610M is a tube type in the TubeDatabase archive (class: Symbol Indicator Tube). Recorded specifications: brand VEB Werk für Fernsehelektronik Berlin, construction Other / special, socket Special / none, and maximum plate voltage 160 V. The archive does not yet hold a photographed example of this type.
BrandVEB Werk für Fernsehelektronik Berlin
ClassSymbol Indicator Tube
BaseSpecial / none
Construction
Primary TypeOther / special
EnvelopeGlass
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage160 V
Cathode Current2.5 mA
Audio Performance
Key Features
- Mixed gas filled
- Cold cathode
- Direct display of symbols -, A, ~, +, V, %, Ω
- Neon glow discharge
- Electromechanical or electronic triggering
- Z 561M includes red filter coating
- Z 5610M without red filter coating
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Supply 170V | 135 V | — | — | — | 2 mA |
| Supply 250V | 135 V | — | — | — | 2 mA |
| Supply 300V | 135 V | — | — | — | 2 mA |
Application Notes
The tubes can be used for the display of signs and symbols for measurement values and counting results. Construction must ensure the warmest part of the tube is the display window.
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