[Elecraft] K2 CW Filter Grounding mod...

Wed Sep 11 11:15:14 2002

Sorry folks, last message carried an INappropriate Subject line.

Trying again...
_____________________

GM George:

At 12:05 AM 9/11/02, you wrote:
>Is the delta improvement obtained from grounding at the base instead of the
>top due to the lowered inductance of the shorting wires? And/or their
>parasitic capacitance to other circuit components?

I cannot knowledgeably answer this. However, I suspect that it it due to 
the added lead length, which would tend to imply the first of your two 
choices, above.

>Is it acceptable to ground the crystal cases both at the top and the
>bottom?

If you ground on both sides of the xtal can, as suggested, I don't think 
there'll be any additional available holes for grounding at the top as well.

>Would there be any merit to fashioning some sort of shield can around the
>filter components?

I believe I recall that this has been tried and found to be lacking.

>Getting a K2 in a few days and this mod seems to be of such importance that
>I want to do it right . . .

Were it me, I'd follow the grounding at the bottom recommendations and be 
done with it.

73,

Tom  N0SS

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