First thing to do it get a reading from the antenna with a reliable SWR meter- The ones sold in truck stops and The cheap ones at rad shack can be off a bit. Check out MFJ site. The simple meters are going to be more accurate. Also- BE SURE that the SWR meter you get will cover the intended frequency range 9most ham radio meters for CB use are "HF" meters. Anything that says 6 meter ,2 meter or the like are meant for VHF use. And finally, avaoid using "Matchers" or tuners. If the radio is stock, that is LEGAL- it will put out 4 watts max. these guys who "tune up" CB's rarely know what they are doing, to push the wattage and Audio is only going to shorten the life of the radio and the extra 3-5 watts do not make any difference at the receiver end. Like the guys are saying- Be sure the antenna is in tune, the little stubby antennas are no where near as efficent as a 109 inch whip- which is a full Quarter wave on the cb band. Many antennas make claims of being 5/8 wave, impossible gain claims too- the rule of thumb is simple: If it was a coil, or wrapped, 9in other words, any antenna shorter than a physical quarter wave -about 8 feet long) its not allowing full power output. a true gain antenna will be longer than 8 feet. Dual "trucker" antennas are not efficent on cars or jeeps. they are designed to work with trucks with trailers for a reason. The signal will follow the on coming traffic and what is behind them the strongest, anything off the sides, Perpendicular to the truck is not as strong. Your best mounting option, although not easy to do on a jeep in the top middle, Next best is to get the base as high away from the road as you can, and mount it on the side of the jeep. Nest best would be on the tailbate As far away from your spare as you can. Ball mounts or edge mounts that have a set screw that can make metal to metal contact will provide the least noise and best "counter poise". finally, I have seen some guys use a "Magnet Mount" like a K-40 on the hod. although it will work, you are running a high rish of sending unwanter RF to the computer as well as picking up noise from the engine bot. the final mounting point would be a right angle bracket (most ham radio supplies have em- It will allow you to mount the antenna behind the mirror and you can use a stud -3/8x 20 threaded to mount a 4 foot francis or firestick. a little thought now will keep you from not being heard in the future! feel free tp email me at my yahoo account- I'll send a few photos of what i have done for my radio setups.