Relatively, it's not that much extra heat. It's very commonly done, even in
cheap equipment, I've got in front of me a USB hub where the crystal can is
soldered to a quite substantial ground.

But, if you're concerned about damaging the crystal you can buy spring
clips for the larger form factor (HC-49 I think) which will ground the
crystal can quite effectively.

On 28 January 2017 at 08:50, Electron <electron2k4@infinito.it> wrote:

>
> Hello,
> how much *really* necessary is to ground the Xtal's metal cans? (sorry,
> English
> is not my native tongue but I think you get what I mean).
>
> It's extra work, a lot of heat on the can which can damage the crystal
> inside..
> etc.. I would prefer not to do it, if it didn't give any real advantage.
>
> It's a Xtal on a PIC32, potentially used also on noisy (in the EM sense,
> not power
> supply) environments.
>
> With kind regards,
> Mario
>
> --
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>



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