I wondered about that and the thing about the 1/4 wave, I’ve got a 102” whip I stick on my truck in the yard sometimes and it always talks and receives a little better than what’s on it normally and I’ve always thought it was a 1/4 wave. So I raised this base antenna up another 4 feet still have the steel mast clamped to it so it’s around about 27 feet to the base of it where the coax screws on. I drove north for 11 miles and was talking to the wife with her on the 99N1 in the living room and she said I sounded like I was a mile away the whole time and she was loud and clear on my end. The swr actually dropped .1 on both ends after I raised it too but it was always below 1.5 so I guess that would t be noticeable. I’ve got a 99N4 in my personal truck with a Wilson 2000 on a triple mag mount in the center of the roof that performs really well. I’m working south of here so I’ll test it out that direction from my work truck in the morning, it’s got a 99N2 in it with the same mount on the roof but with a Hustler hq27 on it and it’s always done really good too. I haven’t checked it going north of the house till today so hopefully raising it did the trick and I don’t find out in the morning it’s directional.An antenna should perform the same on RX as it does on TX. Look up "antenna reciprocity".The take off angle is the same for RX as it is for TX. Those three radials on the bottom should NOT make a difference on RX versus TX.