[sdiy] Updating an old scope

[DCMagnuson at aol.com]

Hi everyone,

I've had an old Heathkit scope laying around unused for a while, and I 
decided it might be nice to have it in the studio near the modular.  

Currently it has a 2-conductor AC cable, and I'd like to update it and put on 
a 3 conductor (grounded) mains wire.  The hot and neutral wires are switched 
and sent to the primary side of the transformer... both legs are isolated 
from the chassis... good so far.

My problem lies on the ground input for the scope leads.  These are tied 
directly to the chassis.  I don't believe these should be connected straight 
to the AC ground, should they?  I assume there should be a current limiting 
resistor or something in there...  any advice would be greatly appreciated.

Thanks in advance

Dave Magnuson
http://www.indiemusicsite.com/synth/dave