I have a realistic pro2040 scanner and an 20-176 radio Shack antenna mounted 20 ft above my house. I listen to the 150 mhz for fire departments and to 860 mhz for Tmr radio. I've had this setup for over 10 years, this is the 3rd house I set it up at. Since I set it up at this house about a month ago it worked good when it'sbelow free zing outside, when it gets above freezing I start to get a lot of interference on the 800mhz, I still get the vhf frequencies perfect! I get a fire department pages as far as 60 miles no problem but the Tmr I get so scratchy I can hardly hear them. I monitor 3 Tmr towers, 2 of them about 10 miles each way from me and the third one about 25 miles with is scratchy when the 2 others are perfect so I lose that one as soon as the temperature rises. For coax I had 70ft of rg6 rated for 3 ghz from the satellite company so I figured it was that so I bought 70ft good grade rg8x which I installed and it works the exact same way, might even be a bit worse cause it below freezing now and it hasn't cleared up the signal as much as it used to. At the 2 other house I had about 45 ft of rg6 and it worked great for years. The only other thing is I took down my antenna the other day and noticed the plastic on top where u screw in the top part of the antenna was chipped a bit so I unscrewed it and the o ring was broken so I figured that was the problem so I got a new o ring and put a bit of kind of duck seal on the Crack so the water won't get in and that didn't fix it! I did that the same day that I changed the coax and that day was above freezing and it didn't help at all but like I said today is colder but it didn't clear out the signal like it used to. So I'm in the process of buying a new antenna cause I figure the water and humidity got in that one. Let me know what u think, I'm running out of ideas here, If a new antenna doesn't fix it I might have to move the Antenna closer so I don't have 70ft of coax. The Antenna I'm looking at is the Workman t734.