[hpsdr] Update Atlas Construction Notes

[H. Gruchow]

Hi group,

since I have discovered a tiny little mistake I have updated the documentation without 
changing the rev. no. because it is still before april 30 :-).

http://www.hamsdr.com/dnld.aspx?id=217

Unfortunately you get a new id after reloading. So the old link which might have been 
posted is not valid anymore.

I will by a beer for the person who has also discovered the mistake. One hint: it is in 
Phil's ATLAS doc.

73
Horst
DL6KBF