I'm guessing the 4248 performs better. I haven't seen any performance specs on the 3023, so this is a guess. But the 4248 uses folded dipoles ("bowties") for its director elements (the ones out in front). This should give it a gain and directionality edge over the 3023, which just uses simple elements.
The 4248 is very directional for an antenna its size. It's even more directional than the bigger Winegard UHF antenna, altough its gain is lower.
BTW, I ordered a 4248 cross-country, and paid as much in shipping as for the antenna! Later I found a local distributor on the Channel Master website, where I could just walk in and get one for no shipping charges. You may want to check on this before ordering one mail order.
You have a right to install OTA and dish antennas on property under your control.
I've tried both and the CM 4248 worked much better for me. I'm in a multipath situation and with the CM 4248 I can now receive ALL of the OTA HDTV channels which is a lot since I pickup the L.A. stations.
I'm not sure about HDTV since none of my local stations are broadcasting, but I get seven UHF channels plus two VHF channels from 45 miles away. The picture is excellent on all the UHF channels and one of the VHF channels. The other VHF channel has some sparklies some of the time, but then this is a UHF antenna. I get static on two other VHF channels.
Originally posted by ultimate: There must be a difference because I'm not sure how they could ship a 4248 in two pieces. Mine shipped pre-assembled in a large box...
While I'm not sure how much different the two are performance-wise, the 3023 is remarkably similar in appearance to the 4248 and definately comes in two pieces.
If you take a look at this page you will find pictures of my recent attic installation of a 3023. If you look closely you may be able to see where the front end of the boom connects to the rear. (about 3 inches in front of the warning sticker)
Even though I installed in the attic (WAF) I can still pull in the digital broadcasts of all my local networks (approximately 30 miles away) as well as two out-of-state networks (approximately 45 miles away). YMMV.
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