The company that I work for makes hand held "detectors" that have the capability to connect to GPS. They have small screw on plastic covered antennas that are about 2.5" long that have a connection much like a coaxial cable. The antennas are made in house after our original supplier stopped making them. I get to test them on the detectors to make sure that they will "hook up" to GPS. This sometimes takes a while and I suspect that some of the antennas are not very good. If they don't connect fast enough, I just change them out and put them in a bag with a question mark on it. Not saying they are bad but... The bag is getting pretty full. It seems to me that there must be a way to bench test them to see if they are going to provide enough (gain?) to work before they go on the unit. I just had the bright idea to ask the experts on NES. What do you think, is there a way to build a (relatively inexpensive/not super complicated) device to test them? Thanks in advance for the help.