I thought I'd drop a note here about my Solarcon I-Max2000 CB antenna.. I was initially going to buy the A-99, but some bad reviews made me choose the longer (24'), better built model. The I-Max2000 mind you is not much more than a wire in a fiberglass pole. You can actually hear the wire rattle inside the tube. The magic is in the matching unit at the base. Although it can be used without a counterpoise, it does work better with one. I suspect the antenna to be sort of an end-fed dipole, though it is a 0.64 wavelength.. I am no expert.. I also suspect that the coax shield works as a counterpoise when a suitable one isn't present. That is why I use it with ferrite chokes on the coax at the antenna.. But enough techno-babble..
I've had very good results with this antenna. "NVIS." NVIS is when a signal is directed straight up and bounces on the ionosphere back down, covering a few hundred-mile radius. This is different from the usual low angle, long-skip pattern desired in multi-thousand-mile contacts. The radiation pattern of the I-Max is pretty vertical.. However, I do not think NVIS is possible on the 11m CB band.
My first two contacts were, unbeknownst to me, Jamaica and Western Utah. I thought these guys were local until they told me their location! They sounded that good, and they heard me just fine. I was using legal power on LSB. Even with the high angle of radiation of the I-Max, the signal was skipping off the ionosphere.
I like the light weight of the antenna and it's fiberglass construction. It is made of three 8ft. sections bolted together. It is very flexible and holds up fine in windy conditions. I did paint it dark green, and with the trees around the house, it is nearly invisible. It is also pretty cheap, which is the cherry on top of the cake.
I do highly recommend it. I have heard it can also be used on 10 to 17m with a tuner.. See the Eham reviews. Users rate it 4.5/5.