1M1: Difference between revisions

This instrument went through several names.  At its [[1964]] introduction, it was the TU-7.  Some early Tek-internal instruments for design, manufacturing, and calibration had TU (Test Unit) nomenclature.  (Other examples include the TU-?? Variac, the TU-?? dim-bulb fixture, and the TU-50 sine/square/pulse generator.)  In 1965 it was renamed Type 1M1 to fit into the letter-series nomenclature like its predecessor.  Later still, the 067- calibration fixture naming system took hold and it was rechristened 067-0521-00.  The instrument was also revised once - more pulse frequencies - and the name upgraded to 067-0521-01.  It does not appear - under any name - in any Tek catalog I know of, but the 1964 catalog _does_ list a cousin: Type [[10/11M1]], for the Type [[647]] scope.