After ~2.5 years of using a Silver Sensor screwed to the top of my chimney for OTA reception, I decided to get something more permanent and purchased a Winegard 7082 from Tri-State Electronics for use w/ my HR10-250 TiVO. I am 3.1 & 3.2 miles from the Hancock & Sears Tower (with line-of-sight to both), respectively, in the Wicker Park neighborhood of the city.
Even though the Silver Sensor is technically a UHF-only antenna, I have still been able to get CBS with no problem over the years and was getting an average of 88-94% signal strength for all the other channels. The reason I wanted to replace it was that, being an "indoor" antenna, I am currently on my 2nd or 3rd antenna after the connectors/wires on the others have deteriorated over time.
One would expect the 7082 to be at least as good as the SS but that is most definitely not what I've seen so far. After installing it, multiple aiming attempts and subsequent double and triple checking of the couplings from the connector box to the antenna leads, I got very poor signal strength on the UHF channels -- around 50-60%, with WTTW not coming in at all and only 0-20% for CBS, with it varying back and forth from 0 to 20 repeatedly and never getting a signal lock. The same cable was used for both antennae.
I tried calling Tri-State and they basically had no suggestions other than that I'm possibly getting *too much* signal and to try an attenuator and to call Winegard, which I tried doing but all I got was voicemail when calling their 800 number
As of now I'm reconnected to the SS. The CBS feed is OK now but isn't reliable. I can use the east coast DirecTV feed for it if I need it.
Anyone have any ideas ? This sort of annoyance is probably what is going to lead me back to Comcast once they get a TiVO-based DVR.
edit: I guess I can try quad-shield cable but it'd be odd (I think) that the SS would be fine w/ the cable I'm using (generic Radio Shack stuff) while the 7082 is not.