I recently switched over to the QRP Labs VFO, and notice that same birdie. After adding some hefty decoupling capacitors (2200uf) at the VFO and at the 7805 regulator, the birdie is significantly reduced and shouldn't cause any problems. YMMV. I suspect switching to RG174 for the signal injection will help as well, but I don't have any to try with.?
--
Ryan Flowers KC7RYS?
