The topic of DDS generators for VFO's came up on the QRP list. >From there I looked up the AOR DDS-2A, which is a high-end implementation. Has anyone built a lower-end solution, just to replace the crystal bank? I see the crystal packs on eBay from time to time and am still thinking about Glen's internal switch arrangement. de ah6gi/4 Collins 75S-1 serial number 55.