ZM1023
15.5mm symbol tube manufactured by Valvo
The ZM1021 is a clear glass symbol tube manufactured by Valvo. It was used in measurement devices along with the numeric ZM1020 tube. There is also a red coated version, the ZM1021
Brand / Manfacturer | Valvo |
Same Types | |
Likely Tyes | |
Symbol height in mm | 15.5 |
Characters / Symbols | +,-,%,Ω,V,A,sinewave |
Decimal point | none |
Base / Socket | B13B |
Starting Voltage (typ) | 170 V |
Maintaining Voltage (typ) | 145 V |
Current per Segment | 2mA |
Reccomend Resistor | 12.5kOhm = 2mA |
Note:
See ZM1023 Mullard for images of the digits