Sounda like an Alpha v-58 antenna. you can get the plans for the Maco
V-58 and they would be the same as you describe. Go to www.maco.com
and try it out or i can try and send you a copy of the manual

On 17 Sep 2003 22:48:04 -0700,
(Johnny) wrote:

Hey I need help idenifying and the measurments for an old partly
dissambled CB antenna I bought today.
It's a GP type. It has a solid aluminum hub with four spoke stubs for
mounting the horsional radials. This hub has a threaded hole for a 3/8
bolt that looks like it serves as a set screw that secures the antenna
to the mast.
The coax connector is mounted on an "L" bracket that secures one end
of a tuning ring. The other end of the ring is connected to the center
radiator.
There's an insulated wire running from the coax connector to a small
clamp
about midway around the ring. There's indications that the antenna is
at least 19 ft. when assembled
Nothing looking like a top hat came with it.
Any help would be appreicated.
A copy of assembly instructions and measurements would be great
!!!!!!!!!!!!!
I'm planning to get back on the air this winter.

Much obliged

Uppercreek ;-)