I wasn't sure where to put this. here or the V-U section. Since this is about a antenna, I choose here. The antenna(s) discussed are from Channel Master. Similar model number, similar basic design, but slightly difference performance. They are the 4228A (1st) & the 4228HD (2nd), both are 8 bay- bowtie reflector antennas. My preferred antenna for UHF TV reception. Long story short, between the original (US made) 4228A with web screening as a reflector, this newer cheaper version has 2 sets of 8 horizontal tubes but doing so, reduces the F/B ratio noticeable. Compared to the original when I swapped antennas, I'm getting phase cancellation of some stations that are 180 degrees apart from a smaller antenna aimed at those which I didn't have trouble before. Before anyone asks, the swap improved reception of certain stations facing NW at the cost of the ones SE due to cancellation from a poorer F/B ratio. A classic "robbing Peter to pay Paul" scenario The question is; anyone having suggestions to improve the F/B ratio?? Being aluminum, soldering to that won't work and I question just wrapping/tying some type of screening (similar to what CM used on the original design) to the existing reflector. FWIW; I did some close measurements between the original (1st) and the replacement (2nd) 4228 and found; VHF reception (at least on channels 7-9) was less, UHF channels below 29 were 1-2 db greater, Channels 31-36 were 1-2 db less. The comparisons were taken less than 3 hours apart to minimize reception differences. I attached 4 bay versions of these two designs. The one on the left is the current, the one on the right is the original (ignore the one in the middle). The 8-bay version are 2 4 bays side by side.