Keithley Model 261 Picoampere Source Calibration Standard

BK Precision 8502 DC Electronic Load Programmable 500V/15A/300W. Used

Keithley 230 programmable voltage source

14863 Keithley 230 programmable voltage source

Leybold Laboratory 3kV High Voltage DC Power Supply 522 37 Vacuum Tube Amp 120V

Sorensen XTS120-.5 M5A XTS Regulated DC Power Supply 120V 0.5A , PRE-OWNED .

1pcs HAMEG Frequency meter HM8122

Keithley 244 High Voltage Negative Power Supply -200VDC/-2200VDC