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I would guess that most don't know what their <2.00:1 SWR bandwidth is, that is why I asked you.

My experience with the A/P design antennas I have is they show BW of 3.00 to 5.00 MHz when using a modest length low loss feed line.

I'll assume by your comments that your antenna is just showing a modest bandwidth, more typical of a high gain CB monopole ground plane with 1.00 to 2.00 MHz at best. I wonder if your more modest BW is due in part to the Isolation you added?

My model that is Isolated shows a more modest bandwidth too.

Maybe you should have bought a Sirio New Top One that was built to be more inductive and uses a gamma to add the necessary capacitance to reach resonance.

I'll ask Tib2K to confirm his bandwidth when he gets his new Old Avanti A/P installed. I think you both are going to be about 30' feet to the tip.

<blockquote data-quote="Marconi" data-source="post: 593332" data-attributes="member: 903">I would guess that most don&#039;t know what their &lt;2.00:1 SWR bandwidth is, that is why I asked you.My experience with the A/P design antennas I have is they show BW of 3.00 to 5.00 MHz when using a modest length low loss feed line.I&#039;ll assume by your comments that your antenna is just showing a modest bandwidth, more typical of a high gain CB monopole ground plane with 1.00 to 2.00 MHz at best. I wonder if your more modest BW is due in part to the Isolation you added? My model that is Isolated shows a more modest bandwidth too.Maybe you should have bought a Sirio New Top One that was built to be more inductive and uses a gamma to add the necessary capacitance to reach resonance.<img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f914.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":unsure:" title="Unsure&nbsp; &nbsp; :unsure:"&nbsp; data-smilie="28"data-shortname=":unsure:" />I&#039;ll ask Tib2K to confirm his bandwidth when he gets his new Old Avanti A/P installed. I think you both are going to be about 30&#039; feet to the tip.</blockquote>

[QUOTE="Marconi, post: 593332, member: 903"] I would guess that most don't know what their <2.00:1 SWR bandwidth is, that is why I asked you. My experience with the A/P design antennas I have is they show BW of 3.00 to 5.00 MHz when using a modest length low loss feed line. I'll assume by your comments that your antenna is just showing a modest bandwidth, more typical of a high gain CB monopole ground plane with 1.00 to 2.00 MHz at best. [I][B]I wonder if your more modest BW is due in part to the Isolation you added?[/B][/I] [U]My model that is Isolated shows a more modest bandwidth too.[/U] Maybe you should have bought a Sirio New Top One that was built to be more inductive and uses a gamma to add the necessary capacitance to reach resonance.:unsure: I'll ask Tib2K to confirm his bandwidth when he gets his new Old Avanti A/P installed. I think you both are going to be about 30' feet to the tip. [/QUOTE]

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