This is Channel Master’s biggest TV antenna. It is an excellent VHF antenna plus a fairly good UHF antenna. For VHF, the only antenna that the author knows of that is noticeably better is the Jerrold (Wade) VIP-307 (VHF only, not tested by the author).
(The author’s 3671 was delivered with 6 capacitance hats, not 4 like in the photo above. Perhaps the photo is the “A” model.)
This page is part of “An HDTV Primer”, which starts at www.hdtvprimer.com