Rigid DipolesI have been playing with PVC and Aluminum Tubing for building rigid dipoles.
Most have been built for 10M, 6M and 2M. With the idea of portable operation.
There is a picture of a center "T" with BNC from one of these smaller antennas.
There are also a number of pictures of a 20M dipole here.
For this antenna, a coax "pig-tail" was connected to the interior bolts on the center T.
You will note the larger hole. This is so that a metal nut can tighten the assembly at this point
while providing a good physical and electrical connection to the antenna.
It is full-size, no loading. The antenna is in operation at the QTH of KB0HNR.
It is a top his 45ft tower.
Much to my surprise it has weathered severe storms with winds in excess of 60mph.
I hope that these pictures will help you in your construction projects.