Yeah, it looks like you need a little more gain on vhf-hi for your channels 7 and 12. You could build another of what you have for more gain and make it DBGH with NARODs, but I think ideally in your situation, you need two separate antennas.I’ m look for suggestion or improvement on this original SBGH6 with 2 narods. what should I do next build another one or modify this one.
I would build a GH10n3 for your 146 degree magnetic direction and use your existing SBGH6 for the 31 degree magnetic direction. Then run separate coax lines into an A-B switch at the TV.
Thats classic fading described here :I have some problem on real channel 12 and 7. As soon as it get dark outside the signal is gone.
One possible solution is to experiment with various heights, both higher and lower.