On 18/05/2011 05:15, IVP wrote:
>>> 'isolation' in this context refers to impedance isolation doesn't it ?
>> Not sure quite what you mean here - if you mean impedance
>> matching then it could do that too (e.g. the DI box would), but a
>> 1:1 transformer would just be for galvanic isolation purposes
> Not wishing to start anything, but a transformer can still pass a fault
> current. eg a 1:1 mains isolating transformer does have 240VAC on
> the secondary but is not referenced to ground, so the number of
> situations where there's risk of shock is reduced but not to zero. It's
> no bad thing having an isolation transformer, don't get me wrong

Yes it can, now I see what you were getting at. I was just thinking=20
along the lines of removing the ground reference. Just to be clear, I=20
was talking about a 600 ohm 1:1 in between the mic and the equipment,=20
not a mains isolation transformer. Anything with a route to mains=20
voltage has this problem though.
I'm probably missing something here, but how were you thinking the SMPS=20
would solve this?


--=20
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