Base antenna rebuild

[roadrage]

I have an aluminum base antenna for 11M that my stepfather threw off the roof of his hunting camp. He was going putting up an antenna for his cell phone booster and needed the room. It was on its way to the dump so I asked if I could have it.

I haven't measured it, but the vertical is about 18'. It has 4 grounding radials that are tapered aluminum rod. 3 of the radials will be able to be re-used after a little straightening. The 4th one had the misfortune of breaking the fall. I was going to use an aluminum tent pole, but I can't find one. I do have a 10' stick of 1/2" copper pipe. Could I use 1 strait copper pipe and 3 tapered aluminum rods for the grounding radials, or is the odd metal going to affect the radiation pattern?

 

[binrat]

I would check it for the match system. If its a coil then ditch it and build your own that can take some juice and maybe get some band width at the sametime. Something like this Tips and tricks on how to build your own CB Antennas. and repair the fourth ground plane element.

 

[KC9Q]

Here's a good source of aluminum for either making a new antenna or rebuilding an old one: Cycle-24.com - Aluminum Tubing and Saddle Clamps for Yagi Antennas.

 

[roadrage]

There wasn't a matching coil on it when I went to pick it up. He pretty much unfastened it from the pedistal and tossed it to the ground. The antenna was dragged into the woods at the edge of his property. If it did have a coil, when it was mounted on the roof, I don't know because he had already taken it down by the time I saw it. I don't think he removed anything from the antenna, but who knows.

I checked out that site binrat, and a couple others. I got the idea of the matching coil. I wish I knew the manufacturer of this antenna and I could research if it was meant to have one. I have seen two antennas, in my town, that look identical to the one I have with one exception. They have only 3 radials and mine has 4. Neither of them have the coil. If it didn't come with one, would it be beneficial to make one? If yes, would I be able to use some 3/8 SS tubing (transmission cooling lines) as they would be easy to bend in a circle.

 

[The DB]

Pictures? And means how it is down close ups?

Someone on here would likely be able to identify the antenna.


The DB

 

[binrat]

RR,
some of those antennas has a small internal coil in the plastic base where the so239 is attached.
As DB stated pictures would be good.

 

[roadrage]

It is in pieces at the moment. I had to dismantle the antenna to drive it 32 miles out of the woods. If I get out of work early today. which is very likely, I can try to get some pics up.