[happytiger]

The problem with DC on the AC mains is that you could saturate the transformer core, in fact back when TV sets used half wave rectification the DC load was significant at the sub station transformer ,this would reduce the KVA rating of the transformer and of course it would buzz loudly. Back in those days you were not encouraged to ensure that the chassis was always connected to neutral (to try to balance the load) plugs were reversible to enable this, however most engineers preferred to leave the repair with chassis connected to neutral, (except with DC mains).