I've just had the pleasure of cutting apart a Jo-Gunn Son of a Gunn
Let me tell you, this antenna is HEAVY at the base! It should come at no surprise when you see that they use THREE layers of tubing in the base of this antenna!
Its also amazing, their use of woodscrews to hold this bad boy together! I used a hack saw to get the base apart, which is when I found the screws. They actually break off the heads and then slip the pieces together, covering the screws.
Now you may ask, why cut this antenna up?! Well, the previous owner cut the top tubing of the base assembly for some unknow reason. I wanted to fix this piece of aluminum and sell it, but I couldn't get it apart! The more I dug into it, it became clear that the base would have to be destroyed to get it apart, which would allow me to replace the previously broken section.
I got the antenna for free so what the heck! Out came the saw! (I'm cutting up a Maco V58 also. I'm doing a write up on how to convert your V58 to a V5000 with almost
over the counter parts!).
What is interesting about this antenna is its height! 26'. I know of only one other antenna close to that length; the Sigma IV. This antenna uses 4 ground radial sloping down at a 45 degree angle and a gamma match, much similar to the Sigma IV. BUT, whereas the Sigma IV is only a half wave antenna, THIS antenna may truly be a 3/4 wave! (That should stir up the flies in here...right Bob!) But but, there is a weird sleeve inside the base section that may make this a different antenna altogether.
Also, this antenna does not use a coax connector. Not a bad idea as the coax connector is usually the weak link in an antenna system.
I may rebuild it. The base assembly is VERY easy to build with standard aluminum square tubing and a hole saw! I wouldn't have used wood screws, but maybe Jo-Gunn was trying to keep the base assembly a secret. I don't know.
I don't have the manual for this antenna so I'm not sure what the original tubing lengths were. I'm going to try to get one from the factory.