Tektronix Type M Plug-in Unit

Vintage Tektronix Type 1A1 Dual-Trace Plug-In Unit #B

Tektronix Type 60 Tube Amplifier Plug In Unit - Untested

Vintage Tektronix Type 1A1 Dual-Trace Plug-In Unit #A - as/is

Tektronix 7B87 Time Base Plug-In Unit - Works

TEKTRONIX 7A13 DIFFERENTIAL COMPARATOR W/ ORG. MANUAL PLUG IN TESTED WORKING

Tektronix Type CA Dual Trace Calibrated Preamp Plug-In Unit

UNTESTED Tektronix Type L Plug-In Unit Fast-Rise Calibrated Preamp ~ Made in USA