Hi Mickey

Copper is GREAT for Antenna's!
It's only slightly heavier than Aluminum.
But their are MAJOR advantages to using copper.
Solid corrosion free joints is only one of them.

There are three (without getting technical) basic copper tubing types
available. Soft Copper (easily bendable), Hard Copper (water pipes,
which can be swedged under heat), and Annealed Copper (refrigeration
tubing).
Regular Hard Copper water tubing is sufficient for most antenna work.
But if your building something like a long Yagi, you definately will
want to use Anneled Copper for the boom or you will wake up with
U-shaped Yagi one morning.
You can also often work in smaller pipe sizes when using the Annealed
Copper as well. Such as 1/2 inch Annealed instead of 3/4 inch Hard.
Even the soft copper comes in handy for some non-supporting components
such as coils and the like.

When joining copper using fittings or swedged joints use either
standard plumbing methods or preferrably silver solder in these
joints. When building things like Yagi's where you may be passing the
elements through the boom without using fittings, copper phosphorus
bronze brazing rods work at propane torch temperatures and make a more
secure joint than silver solder on these types of connections.

Where electrical connections need to be made (and often may need
changing or maintenance) I found that adding a soft copper tube or
heavy copper wire, affixing it to the antenna with copper phosphorus
bronze, allows a good soldering gun and rosin core solder to make the
electrical connection to the pigtail installed for this purpose.

TTUL - 73+ de Gary - KGØZP