both of the unit you listed use the same base unit just different looks but the model numbers are the same. Take Earle's advice and get it off Ebay. that is where I got mine and it works great with the little antenna that comes with it. this model also has a high and low output if you read the manual. on high in my area the transmitter go about 1/10th of a mile with perfect clarity, and another 1/10 with static. I have not done a range test with it on low yet. the frequency bleed over seems to be fine I have another radio station at .2 above my home station and it does not bleed over or cause interference for me. I tested it on my car radio and a house radio. if you put it on high and need more range for some reason you can add another antenna pretty easily just like the first link you put up. if even on low for some reason it is putting out too much power try changing where you put it (lower and further away from road). If that does not work take Orville advice and put an attennuator on it. Hope this helps.