I'm not impressed by amplified antennas. They are usually a so-so antenna paired with a POS amp. You get a lot of gain, but a lot of noise as well. I replaced one with a nice un-amplified antenna and I got significantly better reception. I went with a DB4. If you need more gain, there's the DB8. They are similar to the CM-4221 and CM-4228 mentioned earlier. I believe the price was lower on the DB4 when I purchased. It also looked to be built from better materials, but that was just looking on the web, I haven't seen the channel master antennas in person. <br>
<br>Note that all of these are directional antennas. If all your stations are in close to the same direction, they will work well. If not, you will need to consider other options. I would certainly be very carefull with trying to combine antennas. It's possible to cause one to actually transmit the signal from the other if you're not careful, that will irritate the FCC should you cause problems for people. I would guess that it's more likely with amplifiers in the mix. <br>