Q: FM Antenna & Ground Isolator
 

I need advice on the following -

I have a Magnum Dynalab ST-2 antenna
(http://www.magnumdynalab.com/fmantenna-st2.htm) that I am mounting
adjacent to my chimney. It will connect to my FM tuner via RG6/RG59. As
I understand it, I also need a ground block as shown he
http://www.seniorindustries.com/stat...oundBlock.html

Is using one typical good installation practice? Should I be worried
about insertion loss or is it not likely to be noticed? I apologize for
the extreme n00b questions but I am what I am.

I will appreciate any comments.