Paul:
Sounds as though you have been quite busy. I know that poor connector connections can be blamed for a whole lot of interference problems, poor signals, etc. Multiply that by 3 connectors and they're lucky to have had much of a signal at all.
BTW, there was an excellent article on spectrum analyzers and coaxial cable (diagnosing problems on the coax) in this month's S&VC.
The online version doesn't have the photos; let me know if you are interested and I can get a copy to you.
http://svconline.com/ar/avinstall_no_hit_miss/index.htm
