AVR-Chat

--- In AVR-Chat@yahoogroups.com, "Tim Gilbert" <tim@...> wrote:
>
> Hate to disagree but we always solder the case down to the board. 
(That is why the pad is on the board.) 

No problem Tim  - we can remember one customer that wanted to do that. 
For most others we provided a couple of drilled (grounded) pads so 
they could put a wire loop over the can.

I found this message on a quick web search but admit to not knowing 
anything much about the internal construction:-

"The crystal is commonly mounted within the can by the help of a 
polymeric glue. Heating up the can by soldering can damage the glue, 
resulting in a drastical increase of mechanical dampening of crystal. 
The consequence can be a shift of frequency or even a refuse of start-
up. So, normally, you should not solder the can. "

luck,