"Mark Zacharias" wrote in
.com:


I'm pretty sure the earliest Tek model only had a two-lead power cord,
and their power transformers have held up fairly well the past 50
years.

Mark Z.



As far back as I can remember,TEK scopes all used 3-wire power cords.
the earliest used a round twist-lock connector with a center ground pin.

BTW,the invert/add function on dual-input scopes makes a pretty poor
differential amp. you'll see a lot of artifacts that aren't really there.

--
Jim Yanik
jyanik
at
localnet
dot com