I just completed Re-Optimization Runs for FF4 and FF6 WITHOUT Reflectors in Ch14-36
"Even Newer UHF Band" [will upload results in next few days...incl. comparison to less than Optimum simple Re-Scale]. Re-Optimizations for "Even Newer" UHF + Hi-VHF Bands are currently running [SWR isn't THAT much higher than desired range...at least in versions with NO Reflector]. FF4 [NO Refl] improved 1.1 dB on 470 MHz [9.8 to 10.9 dBi] and 1.5 dB on 608 MHz [11.2 to 12.7 dBi]....which will be in same ballpark of improvement after adding the Double Angle Reflector.
Now that I know how much BIGGER they are, the next step is to Re-Optimize AGAIN with suitably BIGGER Double Angle Reflectors, including variables for the Bowtie-To-Reflector Separation and Reflector "Bend" Angle. Last time I did these runs it took several days per Run....and I may or may not need MULTIPLE Runs per Design [also, for the Dual Band, UHF+Hi-VHF variant, I want to find the "best" WIDTH for BOTH Bands]. I don't think I'll need to try LOTS of different Reflector Heights this time....so maybe I'll be done with at least the UHF-Only version by the end of April.....
MEANWHILE, I've tried several Lo-VHF Re-Optimizations [for Ch2-6, Ch2-6+FM, Ch2-6+Ch7-13, and Ch2-6+FM+Ch7-13] for various Antenna Types [with NO Reflector to begin with], looking for something Shorter than a 2-Story House!!!!! So Far, the 2-Bay Bowtie appears to be in the lead.....and I've wasted a LOT of computer time on the Alternatives....runs are complete, so should upload Results "any day now". These tend to run in less than a day each and leave enough processor time free to run TWO at the same time on any of my 3 computers [unlike Screen Grid Reflector types that hog ALL of the 12 Hyper-Threads]. And I REALLY need to take a look at a 4th PC Tower that my [now MACBOOK] son passed on to me to see what else it needs to help heat up the back room.
I also have a Re-Optimization running for the HHH (Holl_ands Horizontal Harness) & other Mods to improve Hi-VHF for the OLD CM4228 8-Bay Bowtie, just as I did for new CM4228HD.....
Summary of Lo-VHF Designs can be found here:
Rocky Mount, VA Antenna Suggestions (Revisited)
There is LOTS of Time Left to Re-Optimize a BUNCH of other Antennas....for the MOST part, Ch38-51 won't even BEGIN to move until 14Sep2018 and you'll STILL need coverage for that band for LPTV and Repeaters until the Phone Companies actually decide to BEGIN OPERATIONS....which might be early 2019...or even 2020????
Note that Phase1 is Toledo, OH [NOT incl. Detroit]....and a bunch of small DMA's:
Phase 1 is scheduled to Begin Testing on 14Sep2018 and completion by 30Nov2018
....for more details see my fol. post:
AVS Official Topic: The FCC and Television Spectrum Repack
FYI: My SOCAL Area [Phase 2] is scheduled to Begin Testing on 1Dec2018 and completion by 12Apr2019
and will be one of the first truly BIG DMA's to suffer an upheaval....
PS: I'm struggling trying to find a SHORT Term to describe the "Even Newer UHF Band"....cuz we've already been using "New UHF Band" to describe current Ch14-51 coverage. I'm not all that enthusiastic about "500 MHz Band" or even "Ch14-36 Band"....any suggestions?????