Mount GDL51 under glareshield

[Fritz1]

installed a GDL51 receiver in the right panel stack under the glareshield, felt too bulky to install on top of glareshield, use to feed XM weather to my handheld 796 via bluetooth, wondering whether anybody has done this install and whether XM signal is strong enough to go through composite glareshield or whether additional XM antenna should be plugged into GDL51 and put on top of glareshield, black glareshield gets hot in flight, plug in antenna is also black, soo wondering what is better, GDL51 under glareshield or antenna that gets hot on top of glareshield, opinions?

[Schllc]

I have it on the underside of my glare shield. 
it seems to work fine. 

[Pinecone]

I have a GDL-52R mounted under the glare shield.  It works fine if the antenna stays in place.

Had it move one, and one time they did some work and did not get it back into place.

[Fritz1]

good point, will simply try it out, have the GDL51 mounted in tray on top of transponder in right stack under glareshield, I have the remote antenna which I can mount on top of the glareshield if there are any issues, my old GXM42 antenna was mounted on the glareshield and I think it got fried from the heat, lasted about 5 years

[LANCECASPER]

I don't have a Remote GDL-52, but just the standard one. It has never given any problems, but just to keep the Texas heat from frying it I added this to the top of it: https://www.ebay.com/itm/326775852249.

The built in antenna has worked fine but even if I do end up mounting it remotely, the remote SXM antenna (https://www.aircraftspruce.com/catalog/avpages/garmin_11-17587.php)  is not crazy expensive like the GXM40 & 42 were. 

[Fritz1]

nice, hope fiberglass glare shield does not have any more electromagnetic resistance than this cover, will fire up the GDL51 under the glareshield this week and time the download

[LANCECASPER]

The reason that I haven't remote mounted mine is that I want to see the status lights for SXM, ADS-B, power, GPS, bluetooth. I also want to be able to reset or pair it if necessary also.