[Elecraft] Design reasons for X7-X11 case soldering

[Ken Wagner]

If you are talking about only X7-X11, then I would suggest following the 
instructions in the manual, pg 50, which describes installing the ground 
wires for these crystals on the sides, not the top.
73, Ken K3IU
~~~~~~~~~~~~~~~~~~~~~~~~~~~
At 02:14 PM 6/11/03, Tom, W6WW wrote:

>So should I change the top-soldered crystals to bottom side grounding?
>
>73,
>Tom, W6WW
>K2 #3453
>
>
> > Actually, the desired result of grounding the crystal cans with a direct
> > lead is a low inductance ground that sets up a shield to crystal signal
> > blowby, thus improving the performance of the filter.  Stray coupling of
>the
> > signal you are trying to filter might be greater if the cans were all at a
> > higher impedance than direct grounding them creates.
> > You are converting the cans from acting as plates of a capacitor to acting
> > as a shield.
> >
> > Often crystals have a steel type can, and thus you also are getting the
> > magnetic shield tied well to ground.
> > -Stuart K5KVH
> >
>
>
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