Yes, signals increased 10db overnight. But, I did most of my testing back to back within a few minutes. Then I'll do them again back to back and compare the scans.From now until stable weather returns come winter is a challenging time to do over the air reception tests. Signal levels and SNR are constantly changing.
I'm very impressed with all the antenna work you have accomplished!
So, for what it's worth, I don't compare scans that are hours apart. I feel guilty when I can't keep my scans within 10 minutes apart. I know signal strength can change quickly with the weather or even sunrise and sunset.
Thank you for taking notice of my project. The UHF was much easier than the VHF.