EK-40 Geiger Power Supply

• Safe high voltage
• Fully adjustable voltage to measure GM tube plateau region,
• Serves as supply for the Millikan Oil Drop experiment.
• Current limited output for safety.

EK-42 Low Voltage Power Supply 

• Fully adjustable 0-6 Vdc
• Fully regulated for ripple free, stable output
• Electronic current limiting. No fuses to replace.