Quote Originally Posted by W3WN View Post
N3ZI sells DDS kits, I've heard good things about them. Might be worth checking into?
The big gotcha with 'ZI's offerings is range. Make the thing in two versions...wideband (0.1-32MHZ) and PTO/VFO replacement (5.0-5.5 or 5.0-6.0MHz)...you'll have a good solution for either application.

Don't scrimp on the rotary encoder for your DDS project. Use a Grayhill 63F256 or similar ball-bearing model. This one is rated at 300 million revolutions and turns smooth as silk.