CK1903 Engineering Sample

ca. 10mm symbol tube manufactured by Raytheon

The CK1903 is a clear glass endview tube manufactured by Raytheon. It can display the plus and minus sign. This tube is an engineering sample and is very rare, there is also no infomormation available, if there is a series CK1903 tube.
Brand / Manfacturer Raytheon
Same Types
Likely Tyes
Symbol height in mm ca. 10
Characters / Symbols +,-
Decimal point none
Base / Socket SK-136
Starting Voltage (typ) tested at 170V V
Maintaining Voltage (typ) 0 V
Current per Segment 0mA
Reccomend Resistor 0