Can anyone recommend a good wingtip NAV antenna (VOR/LOC/GS)? Or tell me if there's no such thing? The one I have installed in my RV-7 is marginal and not getting it done. It's a strip antenna with balun loop. VOR is only reliable within 10-20 miles. I can barely capture a LOC at ~8 miles and get no GS except a frequent false GS when I'm almost overhead the airport.