You have to see DL4JAL dds. I modify original pcb for using dil or smd
oscilator and 3,3v regulator and 7pole lpf.I use there a ad9851 and 160MHz
oscilator (wit ad9850 there is a 125MHz smd oscilator).I made seweral pcb
and now I try to made a separetly dds module and controler unit which use
an atmel at89S52. one frien of mine modifing soft for controlling an
ad9857 (14bit d/a converter).
Nice description is from VU3CNS.
I can send for those who are interesting a pcb printout and source
Vy 73's from Zibi