30mm symbol tube manufactured by Mullard

The ZM1041 is a special character indicator tube with red coating for better contrast. The character height of 30mm makes this tube a companion to numerical indicators like the ZM1040. Its a rare tube, beause it was produced in less numbers as the numerical indicators. This tube was also manufactured by Philips, Tesla and Valvo.
Brand / Manfacturer Mullard
Same Types
Likely Tyes
Symbol height in mm 30
Characters / Symbols +,-
Decimal point none
Base / Socket B13B
Starting Voltage (typ) 170 V
Maintaining Voltage (typ) 140 V
Current per Segment 4.5mA
Reccomend Resistor 6.8kOhm = 4.5mA