Optical experiments

One of my Facebook memories today was an ARRL publication of 2019 called "The Proceedings of Microwave Update 2019" in which I appeared on page 25 with an optical receiver that someone else had used. 

My optical tests were great fun. They all happened before my 2013 stroke. I can recommend optical experiments to anyone, as all the gear for use and testing was homemade easily in the back of the garage (literally).

If that darn stroke had no got in the way, I should probably still be doing optical tests today!