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Actually, I was referring to no overlap. I have installed my share of a99/imax antennas using 2 foot long fiberglass rods as a separator in the last few years (their are previous posts on this forum where I talk about this). This put the antenna a few inches directly above the mast, and this is specifically what I was thinking about when I made that statement. Mounting these antennas in a way that they overlap the mast is simply creating a capacitor between the mounting bracket and mast, which, to me, is not the same as isolating the antenna from the mast. Using something like a fiberglass rod to elevate the mounting bracket above the mast would be far better at minimizing said capacitance, and thus better at "isolating" said antenna from the mast (even if its not complete isolation electrically it is very close). Am I wrong?

And t2lt antennas, in my experience most are hung in a tree or on an extendable fiberglass pole, so in those cases their will generally be no overlap, and no metal mast.

In your models, what ground quality are you using? It appears that it is a better ground than I typically use...

The DB

<blockquote data-quote="The DB" data-source="post: 620889" data-attributes="member: 21346">Actually, I was referring to no overlap.&nbsp; I have installed my share of a99/imax antennas using 2 foot long fiberglass rods as a separator in the last few years (their are previous posts on this forum where I talk about this).&nbsp; This put the antenna a few inches directly above the mast, and this is specifically what I was thinking about when I made that statement.&nbsp; Mounting these antennas in a way that they overlap the mast is simply creating a capacitor between the mounting bracket and mast, which, to me, is not the same as isolating the antenna from the mast.&nbsp; Using something like a fiberglass rod to elevate the mounting bracket above the mast would be far better at minimizing said capacitance, and thus better at &quot;isolating&quot; said antenna from the mast (even if its not complete isolation electrically it is very close).&nbsp; Am I wrong?And t2lt antennas, in my experience most are hung in a tree or on an extendable fiberglass pole, so in those cases their will generally be no overlap, and no metal mast.In your models, what ground quality are you using?&nbsp; It appears that it is a better ground than I typically use...<a href="http://hittman.us" target="_blank">The DB</a></blockquote>

[QUOTE="The DB, post: 620889, member: 21346"] Actually, I was referring to no overlap. I have installed my share of a99/imax antennas using 2 foot long fiberglass rods as a separator in the last few years (their are previous posts on this forum where I talk about this). This put the antenna a few inches directly above the mast, and this is specifically what I was thinking about when I made that statement. Mounting these antennas in a way that they overlap the mast is simply creating a capacitor between the mounting bracket and mast, which, to me, is not the same as isolating the antenna from the mast. Using something like a fiberglass rod to elevate the mounting bracket above the mast would be far better at minimizing said capacitance, and thus better at "isolating" said antenna from the mast (even if its not complete isolation electrically it is very close). Am I wrong? And t2lt antennas, in my experience most are hung in a tree or on an extendable fiberglass pole, so in those cases their will generally be no overlap, and no metal mast. In your models, what ground quality are you using? It appears that it is a better ground than I typically use... [URL='http://hittman.us'][COLOR=#000000]The DB[/COLOR][/URL] [/QUOTE]

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