A former coworker friend sent me a Tektronix 3-slot mainframe and several plug-in modules (Fig. 1). The TM500-series mainframes are 1970s vintage, but like a lot of old test equipment, can still work ...

Looking to output different types of signals to design, test and troubleshoot your electronics? Try out the function generator at Sears think[box]. Bring your electronics to Floor 3 of Sears think[box ...