[Elecraft] K6SE Sprint Summary for Team Elecraft

[George, W5YR]

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?

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

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

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

73/72, George    
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe   
Amateur Radio W5YR -  the Yellow Rose of Texas
In the 57th year and it just keeps getting better!


Vic Rosenthal wrote:
> 
> James Hammons wrote:
> >
> >    I would not solder to any crystal can at the base.  If you cause a
> > leak in the crystal cans feedthroughs your crystal will die, most
> > likely getting worse over a long period of time.  I can't believe this
> > mod would do anything at 5mhz.
> 
> Believe.  I did it and the change was very, very significant.  A big
> improvement.  Someone once told me that when you are trying to get 60 db plus of
> attenuation you should think of 5 MHz like 500!
> 
> I cleaned the cans with scotchbrite before I soldered them with a 700f tip.  It
> went very fast and I'm sure I didn't damage them.  But I can understand how
> someone with minimal soldering experience and/or a poor iron could overheat
> them.