Originally Posted by mclapp /forum/post/15405217
Side by side (Horizontal Stacked) with the screens touching (bound together) will give you a narrow beam on UHF and some limited VHF-hi reception.
Keep track of the phasing, the right side of antenna 1 should hook to the right side of antenna 2 and left of antenna 1 to the left of antenna 2.
I think about as close as you can space two 4221As is about 20 inches center to center.
According to this chart The Two-Antenna Trick (outdoor version)
Here are my UHF channels
CH36 - 303 true WUFT
CH28 - 287 true WGFL
CH16 - 280 true WCJB
Ch31 - 249 true WOGX
CH29 - 221 true W29AB
Note on tvfool W29AB is listed wrong, it's on 29.0
I want to null Ch31 some, as it's overloading I think. All the first three come in full scale, so even though they appear borderline into overload they are fine. Ch31 though should be stronger but is only an 80 and I think considering it's closer and a lot more power, I think it's in overload. I have not tried it without the amp due to the location, but next time I am up on the roof I will. (Pigs have trouble on ladders).
It appears if I space them 20 inches (screens touching) but out of phase I should be close to what I need???????
All the channels are close together freq wise except 16, but it's pretty strong.
I tried stacking them on top of each other and things got worse. But I just have screen touching and according to your post they should be 8 inches or the distance of the other elements. I have them in phase. Every channel got worse than one antenna.
I did disconnect the 300 ohm wires on the bottom antenna and things got even worse. I tried to reverse them in case and I had them right.