Homebrew PCBs

Often certain portions of a circuit board need RF-tight shielding. 
The following is a link to an article that appeared in EDN magazine
that describes the use of Hammond die-cast boxes and their tops to
shield a defined section both sides of a 2-layer board.

While the example shows a resistor bridging the ground trace through a
cutout in the box, RF circuitry may require a feedthrough capacitor
and a hole in the shielding box.

Here's the URL:
<http://www.edn.com/article/CA379888.html?spacedesc=designideas&industryid=44217>

Regards,
Ted

On Tue, 05 Dec 2006 17:56:09 +0100, Ted Bruce KX4OM <kilocycles@...>  
wrote:

> Often certain portions of a circuit board need RF-tight shielding.
> The following is a link to an article that appeared in EDN magazine
> that describes the use of Hammond die-cast boxes and their tops to
> shield a defined section both sides of a 2-layer board.
> While the example shows a resistor bridging the ground trace through a
> cutout in the box, RF circuitry may require a feedthrough capacitor
> and a hole in the shielding box.
> Here's the URL:
> <http://www.edn.com/article/CA379888.html?spacedesc=designideas&industryid=44217>
> Regards,
> Ted


that's nice, thanks!

I was already thinking about using hammond boxes inside devices for  
shielding, instead of the classic snap-together sheetmetal cage, but this  
may be useful sometime.

ST