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Author Topic: 3Y0J/Bouvet Island Presentation  (Read 1322 times)

WA9AFM

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3Y0J/Bouvet Island Presentation
« on: September 26, 2022, 12:45:41 PM »

Is anyone aware of a PowerPoint presentation on the upcoming 3Y0J Bouvet Island DXpedition?
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KA2DDX

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Re: 3Y0J/Bouvet Island Presentation
« Reply #1 on: September 26, 2022, 01:34:11 PM »

Not aware of a PP for Bouvet, but this may help....

https://www.3y0j.no/
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WA9AFM

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Re: 3Y0J/Bouvet Island Presentation
« Reply #2 on: September 26, 2022, 01:59:48 PM »

Thanks.  Been to the Bouvet page; nothing there.  The 'Virtual Ham Expo' presentation is over and hour long.  My time limit is 20-30 minutes.
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WA9AFM

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Re: 3Y0J/Bouvet Island Presentation
« Reply #3 on: September 27, 2022, 12:22:34 PM »

Update....got a DropBox link from one of the dxpedition crew.
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LA7GIA

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Re: 3Y0J/Bouvet Island Presentation
« Reply #4 on: September 28, 2022, 01:52:40 PM »

Join our OPEN zoom meeting for anyone interested Oct 16th 14  to 16 UTC

Get to know the latest info, how we plan to build the camp step by step, and run our stations

https://us06web.zoom.us/j/85882315850?pwd=SjNpakorckRQOHczdHRxbk5CbWxKdz09

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KD8MJR

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Re: 3Y0J/Bouvet Island Presentation
« Reply #5 on: October 01, 2022, 04:32:50 PM »

I got a good feeling about this one.  I just hope that the propagation is good and that we can hear them from the other side of the Island. 
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“A lie can travel half way around the world while the truth is putting on its shoes.”  (Mark Twain)

LA7GIA

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Re: 3Y0J/Bouvet Island Presentation
« Reply #6 on: October 02, 2022, 01:05:07 AM »

I have done extensive HFTA simulation with the state of art simulation software included our specific antenna setup. Based on this operators in US should expect our signals in range S6 to S9 on e.g 20m. Stations in midwest will have slightly lower signals than east and west coast. I have done a comparison where I put our station at NW (Nyrøysa) and compared it to our actual SE QTH at Cape Fie, and it shows an attenuation of only 6 db. I did the same comparison for JA stations with one simulation from NW QTH and compared it with SE QTH. A NW QTH for JA (and east EU stations) is shown in the simulations as a total blocking of the signals. It means that the Cape Fie QTH is a very good overall QTH also given the fact that this is the only safe place to stay overnight on Bouvet.

Our antenna setup has been adapted to the US in a way that we have made sure to improve the signals in your direction. Our setup include two yagis locked towards US (one tribandet and one warc bander), in addition we have an option to rotate two more yagis 90 degrees to US, so at max we will have 4 yagis pointing to US. All these yagis come with a 4O3A combiner and filters so we can run three stations simultaneously on each tribander and two stations on each dualbander.

For signal strenght I want to emphasize that if you run low power into a vertical you belong to the group that would benefit of improving your setup. If you belong to that group you still have time to work on your antenna setup so to increase your chances. Pick a band or two, improve your antenna, make sure you are on the air, and this will be  a success for you.
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K1VSK

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Re: 3Y0J/Bouvet Island Presentation
« Reply #7 on: October 02, 2022, 06:55:53 AM »

If past history is any indicator of signal strength coming into the US from previous operations there, hearing them won’t be any problem.
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LA7GIA

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Re: 3Y0J/Bouvet Island Presentation
« Reply #8 on: October 02, 2022, 11:16:06 AM »

We have done detailed studies wrt US propagation and that has been the factor determining our antenna design and layout. We have taken the extra step to ensure we have a good signal to US, e.g we increased the effective antenna height to 10m when seeing the difference between 6 and 10m. We also performed engineering calculations (by EA2AQH) to make sure our antenna farm can withstand the expected windspeed at Bouvet.

Personally I am confident our signals will be strong, and we will also work closely with our pilots and they will make sure to feedback real signal strenght. Another trick I use is to send  a real signal report, that way you can easily tell the DXpedition his signal strenght. That is a big benefit of FT8.

However, low power stations in mid-west is advised to improve their antenna for 1 band (20m) to give them their ATNO.
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KD8MJR

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Re: 3Y0J/Bouvet Island Presentation
« Reply #9 on: October 02, 2022, 11:00:32 PM »

We have done detailed studies wrt US propagation and that has been the factor determining our antenna design and layout. We have taken the extra step to ensure we have a good signal to US, e.g we increased the effective antenna height to 10m when seeing the difference between 6 and 10m. We also performed engineering calculations (by EA2AQH) to make sure our antenna farm can withstand the expected windspeed at Bouvet.

Personally I am confident our signals will be strong, and we will also work closely with our pilots and they will make sure to feedback real signal strenght. Another trick I use is to send  a real signal report, that way you can easily tell the DXpedition his signal strenght. That is a big benefit of FT8.

However, low power stations in mid-west is advised to improve their antenna for 1 band (20m) to give them their ATNO.
Thank you for the detailed information.
I look forward to hearing you guys on the air.

73s
Rob
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“A lie can travel half way around the world while the truth is putting on its shoes.”  (Mark Twain)

K5PS

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Re: 3Y0J/Bouvet Island Presentation
« Reply #10 on: October 03, 2022, 03:29:00 AM »

Best of luck and a safe journey to the entire group. Hope to hear you on the air (and that you hear me).

Watched a YT video "Top 15 Strangest Islands in the World" with Bouvet making the list. It used footage from an aerial survey of the island, credited to the 3Y0J DXpedition.

Other DXpedition destinations on the list were Sable, Clipperton, and the #1 strangest island: Palmyra Atoll.
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AF5CC

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Re: 3Y0J/Bouvet Island Presentation
« Reply #11 on: October 03, 2022, 08:52:38 AM »

"Stations in midwest will have slightly lower signals than east and west coast."

We're used to that.  We aren't called the "black hole" for nothing.

73 John AF5CC
« Last Edit: October 03, 2022, 08:56:27 AM by AF5CC »
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K1JX

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Re: 3Y0J/Bouvet Island Presentation
« Reply #12 on: November 10, 2022, 07:51:02 AM »

So, no FT8 on 160 or 80 meters?

Doesn't that eliminate the possibility for a lot of stations who aren't big guns?

I appreciate that DX'ers who invest in and build substantial stations should be at the front of the line due to their loud signals.  But, what happens when that pool runs dry?
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K1VSK

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Re: 3Y0J/Bouvet Island Presentation
« Reply #13 on: November 10, 2022, 09:36:28 AM »

So, no FT8 on 160 or 80 meters?

Doesn't that eliminate the possibility for a lot of stations who aren't big guns?


CW.
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VA3VF

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Re: 3Y0J/Bouvet Island Presentation
« Reply #14 on: November 10, 2022, 10:35:56 AM »

Quote
So, no FT8 on 160 or 80 meters?

Interesting, since I think there will be FT8 on other bands, or that changed as well?
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