PLL boards, Signal Sources etc.

I also bought some cheap PLL Developer boards  to play around with. They suffer from jitter, but  good enough for experimenting with. Also picked up a 4GHz white RF noise source for testing microwave receivers, ie. 1.2GHz, 2.4GHz and 3.4GHz transverters.

http://www.qsl.net/vk2kfj/pll.html