Grounded Chassis

[Haible Juergen]

	>If some circuit is housed in a unearthed metall chassis, what does
this
	>mean for interference?

It will probaly get worse than without enclosure at all.

	>However, it seems to me that a ungrounded metal chassis is pretty
useless in >terms
	>of interference.

Yes. Just the way I see it.

>  >But that's what the industry seems to sell most.
> 
Not sure about that. A single ceramic capacitor can be enough
to "ground" the chassis for HF. Not perfect, but in practice will
turn the antenna (making interference worse than no enclosure)
into a shield (improove interference).

	JH.