"Ed" wrote in message
. 192.196...


I wish to build a 23 foot whip antenna similar to the Shakespeare 393 HF
marine antenna, ( quite pricey ). It must be in three 7 1/2 foot long
sections and screws together, as shown he http://shakespeare-
marine.com/antennas.asp?antenna=393

I'm thinking along the lines of a 7 1/2 foot stainless steele whip on
top of two 7 1/2 foot long segments of my own construction. At present,
I think the two bottom sections would be copper tubing, enclosed within
PVC pipe. Although I have some ideas for the connections, I would like
to hear from others their ideas on both the building of two stiffer bottom
sections for this whip, along with ways of fabricating the screw-together
connections that would be both electrically sound and sturdy. The whip
will be for fixed mobile operation at a motorhome. The entire assembly
must break down and fit within a larger 8 foot long PVC tube for storage.

I realize I could go with telescoping aluminum tubing, but I prefer
something more elegant, such as this marine antenna.

Ed K7AAT


A 23 ft antenna should be easy and cheap. I would get one of those old
Antron antenas that was so popular for CB. They are nearly as long as you
want and add a full length CB whip to the top replacing the origonal whip
should get you there or awful close. These were end fed half wave antennas
so you could remove the matching network at the bottom and replace it with
your own.


Jimmie