...How long has FTA satellite hobby been around? ....
I began planning my first homebrew dish in 1979 (15 ft. dia. constructed from 3/4" EMT with window screen reflector). The FTA (TVRO those days) hobby had been around several years before that. By early 1981, I had the system completed including a horizon to horizon polar mount for the dish.
Took over a year to design and construct the dish and mount. The screened surface was destroyed in a hail storm and my homeowner's insurance company offered to allow me only $25.00 for damages. I was able to find a 10 ft. dia. fiberglass reject from a local manufacturer for $50.00 to replace it. Took a gallon bucket of "Bondo" to smooth out all the craters in it.
My first receiver was a collection of circuit boards (kit) from an old WWll radar system. The circuit boards were sold by Butch Simpson (Simcom Labs), an engineer who worked for Hewlett-Packard in Colorado. The circuit was superior to other kits of the day because of it's use of a "Travis Discriminator" instead of a "phased locked loop".
I purchased the circuit board components from various sources, installed them, and returned the assembled unit to Simpson for alignment and tweaking. Later purchased one of the early Automation Techniques (Autotech) GLR series receivers (still being used by a family member and it's been running 24/7 since 1984 . Simpson played a part in the design of those GLR receivers also.
Simpsons kit manual included pictures of his system. He used an old Bell telephone dish with a homebrew Cassagrain feed. He included information in the manual (sketches and engineering calculations) to duplicate his system.
This is the most interesting hobby anyone could dream of. The early days were especially exciting and allowed my electronics curiosity to extend further than one might believe.
Harold