I'm planning to build a digital VFO for a radio receiver of mine. Anyone got experience in making them? What would be the easiest and cheapest to make?

This is all I got.

http://www.pan-tex.net/usr/r/receivers/svfo.htm#circuitreceiver
http://www.cqdx.it/woodbox/DDS4_engl.pdf
http://www.cqc.org/kits.htm

Hope any of that helps.

Thanks! I'll look into those links.