I just made a 2m jpole antenna out of 1/2" copper pipes, like this one:

http://www.qsl.net/wrav/2mjpole.htm

On this web site the center conductor of the coax is connected to the
longest pipe and the shield to the shortest.

Now looking at other sites I find the center conductor connected the the
shortest pipe.

So what is the correct way to connect the coax?

Kjell Romma, Norway