Jim:
        Do you use flat first, lock washer second and screw?  What ever flow
the PWB material might have, the lock washer should adjust for it. Of
course, torque it to the recomended number.
        Regards,
        Ramon

> -----Original Message-----
> From: Marsico, James [SMTP:[log in to unmask]]
> Sent: Tuesday, December 09, 2003 10:56 AM
> To:   [log in to unmask]
> Subject:      [TN] GOOD RF GROUND
>
> Hello Technet:
> One of our standard designs is to mount an RF PWB into a housing with
> screws.  The screws have a dual function, one being to hold the PWB in
> place, the other is to ground the PWB to the housing.  An ongoing problem
is
> that, over time, the PWB material flows, causing the screws to loosen
> slightly, thus compromising the ground.  On approach is to mount grounding
> terminals to the side wall of the housing and connect a wire from it to
the
> PWB.  I was wondering if there is any other techniques or products
available
> that may solve this problem.
>
> Thanks for your assistance,
>
> Jim Marsico
> Senior Engineer
> Production Engineering
> EDO Electronics Systems Group
> [log in to unmask] <mailto:[log in to unmask]>
> 631-595-5879
>
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