Tektronix 7704 A Oscilloscope System Opt 9 W/ 7A19 7A18 7B71 and 7B53A Modules

Tektronix 5S14N Dual Trace Delayed Sweep & 7B53A Dual Time Base Plug-in Modules

Tektronix 7B92A Dual Time Base Plug In Module

NOS Tektronix Oscilloscope 7B85 Delaying Time Base Plugin, NOW TESTED Working

Lot of 3 Tektronix 7B53AN Time Base & 7A18N Dual Trace Amp Plug-In Modules

Tektronix 7B92A 500MHz Dual Time Base Plug-In for 7000 Series Oscilloscopes

Tektronix 7603 Oscilloscope w/ 7A26, 7A26, 7B53A Plug-ins FOR PARTS

Tektronix 7B80 Time Base Plug in for 7000 Oscilloscopes