best location to mount XM "Hockey Puck"

[daansley]

My Garmin GPSMAP 496 - XM Nexrad weather (that should update every 5-minutes) will miss one or more cycles whenever my M20J is within 100+ miles of thunderstorms. It seems to be worse when I'm flying northbound.  But it has also happened when flying in a southerly direction.  The XM "Hockey Puck" is presently mounted on the centerline of the instrument panel cover as far forward as possible without touching the windshield.  Is there a better place to mount the "hockey puck"?  Since it is waterproof to 1+meters depth of water, has anybody mounted it on the outside of the fuselage?

Thanks

 

[Piloto]

I have mine mounted at about the same location but underneath the glareshield cover as forward as possible. Since the glareshield is plastic it is transparent to the radio signal from XM. It works very well all the way to GTK in the Bahamas where the published coverage indicates. I made small bracket to held the antenna in place and tied with tywraps. Never had any problems receiving the XM signal except past GTK it drops with no coverage in PR even though in the US and the Bahamas  you can see the San Juan wx radar but not in PR.

José