X10 on the original batwing being the best.
I have found that reception with the new digital flat screen TV's vary dramatically from TV to TV. Which has nothing to do with the RV antenna.
I thought I was having problems with the antenna also.
Then Just by coincidence I bought anothe flat screen TV and parked in the same spot the second TV got perfect reception and 10 more channels than the first one I bought. We started swapping TV's in the CG one night to prove a point and each TV had it's own level of reception......had nothing to do with the antenna.