In article 20060812010400.61fa4a39@localhost,
Dominique Michel wrote:

Le Fri, 11 Aug 2006 02:57:00 GMT,
ml a écrit :

HI

I was wondering in general, how best to create some VERY effective
shielding between some equipment

for example, I wanted to stack my powersupply ontop of a tuner

while each are in metal enclousures and properly"" grounded i wanted
to go further


what is the best way?? would a thin sheet of lead (i'd encase in a
rubber coating) or a sheet of copper?


or would the only way be to say get some copper tape and wrap the unit?


thanks

You must first try to stack the supply on the top of the tuner and hear
what append.

If it is HF EMC, Roy and Dan give you some advices for that.

If it is 50 or 100Hz, only mu-metal will do something. With copper or
metal, you will only get Foucault's current in the shield, and those
currents will make a new EM field on the other side of the shield.
Successive metal shields can even be a very good mean to transport at
distance a low frequency magnetic field. So, only mu-metal will be
effective in that case.

Dominique

what is mu metal?