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This antenna isolation topic comes up from time to time locally as well. I run a Sirio 2016 aluminum vertical antenna on a few sections of military FIBERGLASS antenna mast. The non-conductive fiberglass mast is mounted to my wood framed chimney that in itself houses a steel fireplace flew that goes down to a fireplace about 30' below. This puts the base of my antenna at 36' above grade.

So my aluminum antenna is not mounted to a conductive mast, but may couple capacitively to the steel flew pipe about 4' directly under it. The Sirio 2016 is somewhat unique in the fact that it has (16) 24" ground radials at it's base. For whatever reason, this set up has served me very well for many years now with low receive noise and a good RF take off angle.

Only problem is this white stuff keeps sticking to it in the winter. Need to fire-up the Henry and melt some snow

<blockquote data-quote="BBB" data-source="post: 613920" data-attributes="member: 23770">This antenna isolation topic comes up from time to time locally as well. I run a Sirio 2016 aluminum vertical antenna on a few sections of military FIBERGLASS antenna mast. The non-conductive fiberglass mast is mounted to my wood framed chimney that in itself houses a steel fireplace flew that goes down to a fireplace about 30&#039; below. This puts the base of my antenna at 36&#039; above grade.So my aluminum antenna is not mounted to a conductive mast, but may couple capacitively to the steel flew pipe about 4&#039; directly under it. The Sirio 2016 is somewhat unique in the fact that it has (16) 24&quot; ground radials at it&#039;s base. For whatever reason, this set up has served me very well for many years now with low receive noise and a good RF take off angle.Only problem is this white stuff keeps sticking to it in the winter. Need to fire-up the Henry and melt some snow <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f609.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=";)" title="Wink&nbsp; &nbsp; ;)"&nbsp; data-smilie="2"data-shortname=";)" /><img src="https://i.imgur.com/bKRncFW.jpg" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" /> <img src="https://i.imgur.com/IBfgFM4.jpg" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" /></blockquote>

[QUOTE="BBB, post: 613920, member: 23770"] This antenna isolation topic comes up from time to time locally as well. I run a Sirio 2016 aluminum vertical antenna on a few sections of military FIBERGLASS antenna mast. The non-conductive fiberglass mast is mounted to my wood framed chimney that in itself houses a steel fireplace flew that goes down to a fireplace about 30' below. This puts the base of my antenna at 36' above grade. So my aluminum antenna is not mounted to a conductive mast, but may couple capacitively to the steel flew pipe about 4' directly under it. The Sirio 2016 is somewhat unique in the fact that it has (16) 24" ground radials at it's base. For whatever reason, this set up has served me very well for many years now with low receive noise and a good RF take off angle. Only problem is this white stuff keeps sticking to it in the winter. Need to fire-up the Henry and melt some snow ;) [IMG]https://i.imgur.com/bKRncFW.jpg[/IMG] [IMG]https://i.imgur.com/IBfgFM4.jpg[/IMG] [/QUOTE]

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