You frequently see grounded cans in radio receiver and transmitter circuits=
..=20
It is easy to order them with leads to ground the can, I have several custo=
m crystals in my current project with that feature.

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of=
 Sean Breheny
Sent: Saturday, January 28, 2017 11:09 PM
To: Microcontroller discussion list - Public.
Subject: Re: [EE] Grounding the Xtal's metal cans

If you don't ground the can then the stability and repeatability of the cry=
stal frequency will not be as good as it can be. With the can ungrounded, i=
f you listen to the crystal signal on a shortwave receiver in CW or SSB mod=
es you can hear it jump around as you touch the can. Properly grounded, you=
 can barely hear any tone pitch change when you touch the can.

Sean


--=20
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