One of the things I'd love to have is an LP-100, alas, at the moment, no way, (But it will happen)
http://www.telepostinc.com/
The idea is you could set your radio to it's lowest transmit power, Feed it to the LP-100 which in turn would feed the antenna, Hook up the computer and instruct the software to "Find out what this antenna is" (It's not quite that easy)
And you would, in very short order, know more about that antenna than the people who built it.!