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Alexis, thanks for the drawing of your station. I like the palm tree.

Your GM bandwidth is similar to a GM I had up. It also transmitted a little better. I thought it had a quieter receive than my other vertical CB antennas. Never owned a Sirio 827.

Alexis, I did a model of the 827 below, but I didn't have the dimensions for the matching coil, and other dimensions...so i simulated a good match so I could run the SWR scan for bandwidth. The 827 bandwidth I get is: 1.40:1 MHz at the feed point. Sirio shows 2 MHz which is close to your BW results.

I was surprised with my results for these 827 models. These two models (8 x 55" inch radials vs 4 x 105" inch radials) showed, among other things, I had to increase the length for the radiator about 8" inches...instead of making the radiator shorter, as I stated in my post #6 above.

Models in PDF file below:

Sirio 827GP55''RwMnISOwC 1 36' vs. Sirio 827GP9'RwMnISOwC 2 36'

<blockquote data-quote="Marconi" data-source="post: 727267" data-attributes="member: 903">Alexis, thanks for the drawing of your station. I like the palm tree.Your GM bandwidth is similar to a GM I had up. It also transmitted a little better. I thought it had a quieter receive than my other vertical CB antennas. Never owned a Sirio 827.Alexis, I did a model of the 827 below, but I didn&#039;t have the dimensions for the matching coil, and other dimensions...so i simulated a good match so I could run the SWR scan for bandwidth. The 827 bandwidth I get is: 1.40:1 MHz at the feed point. Sirio shows 2 MHz which is close to your BW results.I was surprised with my results for these 827 models. These two models (8 x 55&quot; inch radials vs 4 x 105&quot; inch radials) showed, among other things, I had to increase the length for the radiator about 8&quot; inches...instead of making the radiator shorter, as I stated in my post #6 above.Models in PDF file below:
Sirio 827GP55&#039;&#039;RwMnISOwC 1 36&#039; vs. Sirio 827GP9&#039;RwMnISOwC 2 36&#039;</blockquote>

[QUOTE="Marconi, post: 727267, member: 903"] Alexis, thanks for the drawing of your station. I like the palm tree. Your GM bandwidth is similar to a GM I had up. It also transmitted a little better. I thought it had a quieter receive than my other vertical CB antennas. Never owned a Sirio 827. Alexis, I did a model of the 827 below, but I didn't have the dimensions for the matching coil, and other dimensions...[B]so i simulated a good match so I could run the SWR scan for bandwidth.[/B] The 827 bandwidth I get is: 1.40:1 MHz at the feed point. Sirio shows 2 MHz which is close to your BW results. I was surprised with my results for these 827 models. These two models [B](8 x 55" inch radials vs 4 x 105" inch radials)[/B] showed, among other things, [B]I had to increase the length for the radiator about 8" inches...instead of making the radiator shorter, as I stated in my post #6 above.[/B] Models in PDF file below: [LEFT] [B]Sirio 827GP55''RwMnISOwC 1 36' vs. Sirio 827GP9'RwMnISOwC 2 36'[/B][/LEFT] [/QUOTE]

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