Keithley 708A Switching System Mainframe w/ 7075 multiplexer 8 1x12

Keithley 708A Switching Matrix Mainframe's Power Control Circuit

Keithley 708A Rack Mount Ears

Keithley 7001 Switch System Mainframe

Keithley 7001 Switch System Mainframe With IEEE-488 GPIB interface

KEITHLEY 708A SWITCHING SYSTEM & 7072 SEMICONDUCTOR MATRIX CARD

Keithley 7001 80-Channel Switch/Control Mainframe W/ 1-7036 Card

Keithley 7013-C Relay Switch Card 20-Channel for 7001/7002 Switching Mainframes