[hpsdr] Introduction and request for feedback

[Mark A. Haun]

Thanks to everyone who replied to my first message.

For those still interested in following my low-power/low-cost DDC/DUC
feasibility planning, I've started a page on my web site with some
design thoughts:

http://www.keteu.org/posts/minisdr.html

Feedback welcome (and needed)!

73,

Mark KJ6PC