"mick"

Modern electrical safety earthing might allow the 303 to be powered from
the 33 as the mains transformer appears to include an earthed shield
which would isolate the secondary from the primary.

** That is an electrostatic shield - it helps to eliminate mains noise.

That would make it a Class II (double-insulated) appliance.

** Absurd crap !!!

The basic principle of class II is *NOT* to rely on the mains earth for
user safety.

Two reasons:

1. If the mains earth connection is missing anywhere, the equipment still
operates ( with no warning to the user) and you have no safety.

2. If the AC outlet or equipment plug is miswired, active can appear on the
earth conductor and you have a lethal situation.

A very nasty example of scenario "2" occurs when the equipment plug has
earth and neutral wires reversed - which goes unnoticed until the day it is
plugged into an outlet that has active and neutral reversed.



..... Phil