Distortion will reduce signal to noise on all channels regardless of frequency and direction, it’s an amplitude thing: I can't throw a ball higher than 8 feet in my house because there is a ceiling there! Those channels with lower signal strengths will take the biggest hit due to the ratio. I will venture to say that most people are over driving there amps in a suburb environment and don't even realize it. I can see this and tropo confusing many people post after post here.The strong channels in the same direction as my weak ones are real 18, 26 and 35. I don't think those would affect 33? My 91XG is extremely directional, so I doubt off axis stations are overpowering the amp.
Attenuation after an over driven pre-amp does nothing but further reduce the signal to noise.Thanks for the tips. I am 90% sure I am not overpowering the tuner. I did try to attenuate the signal and it just got weaker
You may have a unlikely situation where higher is not better, but consider more antenna and more height made things worse for you....you are increasing the distortion due to stronger signal...just my two cents!Try a comparison of one vs two with the amp bypassed before you get too worked up.