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BM, a good question. IMO much of what we hear about TVI type problems are structural issues. I don't discount such issues as you describe however. There are a lot of connection points in the Sigma 4, so I would make sure they are all tightened well with SS connectors where possible, I don't like screws connecting tappered tubing so I use ss hose clamps over slotted tube ends instead. There are some good joint dressings available today and that is also a good idea to use during construction.

If you have ever had a loose connection, maybe you also noticed some interference as well. I recently installed an AstroPlane that had a stud installed in the end of my top element. This stud is compression fitted and it was loose, but not to the degree that it made the segment non-conductive from top to bottom and it would not allow me to fully tighten the element tightly into the hub. If the element had not been fully conductive, then the antenna would not have work well at all. The antenna did work, but it produced terrible TVI in my own home to TV, phone, radio, and computer. I secured the joint and all of those problems stopped completely.

<blockquote data-quote="Marconi" data-source="post: 156618" data-attributes="member: 903">BM, a good question. IMO much of what we hear about TVI type problems are structural issues. I don&#039;t discount such issues as you describe however. There are a lot of connection points in the Sigma 4, so I would make sure they are all tightened well with SS connectors where possible, I don&#039;t like screws connecting tappered tubing so I use ss hose clamps over slotted tube ends instead. There are some good joint dressings available today and that is also a good idea to use during construction.&nbsp;If you have ever had a loose connection, maybe you also noticed some interference as well. I recently installed an AstroPlane that had a stud installed in the end of my top element. This stud is compression fitted and it was loose, but not to the degree that it made the segment non-conductive from top to bottom and it would not allow me to fully tighten the element tightly into the hub. If the element had not been fully conductive, then the antenna would not have work well at all. The antenna did work, but it produced terrible TVI in my own home to TV, phone, radio, and computer. I secured the joint and all of those problems stopped completely.</blockquote>

[QUOTE="Marconi, post: 156618, member: 903"] [SIZE=3]BM, a good question. IMO much of what we hear about TVI type problems are structural issues. I don't discount such issues as you describe however. There are a lot of connection points in the Sigma 4, so I would make sure they are all tightened well with SS connectors where possible, I don't like screws connecting tappered tubing so I use ss hose clamps over slotted tube ends instead. There are some good joint dressings available today and that is also a good idea to use during construction.[/SIZE] [SIZE=3]If you have ever had a loose connection, maybe you also noticed some interference as well. I recently installed an AstroPlane that had a stud installed in the end of my top element. This stud is compression fitted and it was loose, but not to the degree that it made the segment non-conductive from top to bottom and it would not allow me to fully tighten the element tightly into the hub. If the element had not been fully conductive, then the antenna would not have work well at all. The antenna did work, but it produced terrible TVI in my own home to TV, phone, radio, and computer. I secured the joint and all of those problems stopped completely.[/SIZE] [/QUOTE]

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