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Cook Islands Ultralight DXpedition-- Asian TP-DX Loggings (Part Two)  View Printable Version 
Saturday, April 28 2018

IRCA
This is the concluding segment of the Asian TP-DX loggings made on Aitutaki island in the Cook Islands chain (2,600 miles due south of Hawaii) from April 9-13 using a 7.5 inch loopstick C.Crane Skywave SSB Ultralight and a 5 inch "Frequent Flyer" FSL antenna.

As mentioned previously, phenomenal gray line propagation during the sunrise sessions enabled the modest gear to perform like gangbusters, resulting in reception of MW stations in India, Bangladesh, Mongolia and Cambodia-- all at distances greater than those from typical west coast DXing sites. The gray line propagation also tended to shut down Japanese signals, and take out most of the Korean stations as well. In combination with extensive ANZ co-channel QRM, this limited the number of Asian stations received.


972 HLCA Dangjin, S. Korea, 1500 kW The South Korean big gun played the part on most mornings, including this S9+ Korean female speech at 1631 on 4-12 https://dreamcrafts.box.com/s/gynxilf8rpe762f0y5wbj85k0krh1dvb

981 CNR1 Synchros Changchun/ Nanchang, China, 200 kW/ 200 kW The first of three CNR1 frequencies which usually produced strong signals, this music // 1377 was received at 1624 on 4-12 https://dreamcrafts.box.com/s/tybl0tglmfqkec7u2u1udhgncd4sc5d5

1377 CNR1 Synchros (Various) Overall this was not only the strongest Chinese frequency on the band, but was the strongest Asian station on the band as well. Awesome S9+ signals were typical each morning, as with this male speech and music at 1622 on 4-12 https://dreamcrafts.box.com/s/5eh6zami9876vajyjjfoaqz764lcmo1a

Another potent signal from this Chinese blaster at 1640 on 4-12 https://dreamcrafts.box.com/s/8jlbyscbxe4i8ed1n4admt01f66gt7jt

1431 Mongolia (Relay Station) Choibalsan, Mongolia, 500 kW This station was easy to receive on the first attempt, with very little competition on the frequency. It typically managed an S9 signal after 1630 daily with the BBC's Korean service, which seemed to be broadcast during the peak sunrise enhancement time in Aitutaki's ocean-boosted propagation. Here is BBC's Korean male announcer at an S9 level at 1632 on 4-11, with the BBC interval signal at 47 seconds into the recording https://dreamcrafts.box.com/s/bfl4ohbfmhf9fdvfa6mx6jnxapaayk4a

The Mongolian relay program prior to 1630 was also in Korean, with this female Korean speech at 1627 on 4-11 https://dreamcrafts.box.com/s/5892chd20zbxs3w7r1q1f2qx39f6l7gm

1566 HLAZ Jeju, S. Korea, 250 kW A very poor signal was typical during this trip, with the Chinese service barely showing up under 3AW and two other DU English stations (probably 4GM and Norfolk Island). Whenever 3AW was in a fade it had a chance, since other two co-channels were running very low power. Here is the latter situation, with the weak Chinese barely audible under the DU English snarl at 1641 on 4-12 https://dreamcrafts.box.com/s/hysvrh4f7i8u16f3740ch5azam0iervx

1593 CNR1 Changzhou, China, 600 kW This was another Chinese blaster, with S9 signals typical every morning. Here it was at 1641 on 4-12 with male Chinese speech and music // 1377 https://dreamcrafts.box.com/s/unn7d4h3wa9ro7g7wespunkqeaay6f6e


73 and Good DX,

Gary DeBock (DXing in Aitutaki, Cook Islands)

7.5 inch loopstick C.Crane Skywave SSB Ultralight https://dreamcrafts.box.com/s/oephl2ru7ejk31saxdq2tijqx9db0ros + 5 inch TSA-friendly "Frequent Flyer" FSL antenna (Lagoon beach DXing setup photo posted at https://dreamcrafts.box.com/s/p0om9fb2q1yvtq2ffgj3aquyz3seal4h

 

Cook Islands Ultralight DXpedition-- Asian TP-DX Loggings (Part Two)  View Printable Version 
Saturday, April 28 2018

IRCA
This is the concluding segment of the Asian TP-DX loggings made on Aitutaki island in the Cook Islands chain (2,600 miles due south of Hawaii) from April 9-13 using a 7.5 inch loopstick C.Crane Skywave SSB Ultralight and a 5 inch "Frequent Flyer" FSL antenna.

As mentioned previously, phenomenal gray line propagation during the sunrise sessions enabled the modest gear to perform like gangbusters, resulting in reception of MW stations in India, Bangladesh, Mongolia and Cambodia-- all at distances greater than those from typical west coast DXing sites. The gray line propagation also tended to shut down Japanese signals, and take out most of the Korean stations as well. In combination with extensive ANZ co-channel QRM, this limited the number of Asian stations received.


972 HLCA Dangjin, S. Korea, 1500 kW The South Korean big gun played the part on most mornings, including this S9+ Korean female speech at 1631 on 4-12 https://dreamcrafts.box.com/s/gynxilf8rpe762f0y5wbj85k0krh1dvb

981 CNR1 Synchros Changchun/ Nanchang, China, 200 kW/ 200 kW The first of three CNR1 frequencies which usually produced strong signals, this music // 1377 was received at 1624 on 4-12 https://dreamcrafts.box.com/s/tybl0tglmfqkec7u2u1udhgncd4sc5d5

1377 CNR1 Synchros (Various) Overall this was not only the strongest Chinese frequency on the band, but was the strongest Asian station on the band as well. Awesome S9+ signals were typical each morning, as with this male speech and music at 1622 on 4-12 https://dreamcrafts.box.com/s/5eh6zami9876vajyjjfoaqz764lcmo1a

Another potent signal from this Chinese blaster at 1640 on 4-12 https://dreamcrafts.box.com/s/8jlbyscbxe4i8ed1n4admt01f66gt7jt

1431 Mongolia (Relay Station) Choibalsan, Mongolia, 500 kW This station was easy to receive on the first attempt, with very little competition on the frequency. It typically managed an S9 signal after 1630 daily with the BBC's Korean service, which seemed to be broadcast during the peak sunrise enhancement time in Aitutaki's ocean-boosted propagation. Here is BBC's Korean male announcer at an S9 level at 1632 on 4-11, with the BBC interval signal at 47 seconds into the recording https://dreamcrafts.box.com/s/bfl4ohbfmhf9fdvfa6mx6jnxapaayk4a

The Mongolian relay program prior to 1630 was also in Korean, with this female Korean speech at 1627 on 4-11 https://dreamcrafts.box.com/s/5892chd20zbxs3w7r1q1f2qx39f6l7gm

1566 HLAZ Jeju, S. Korea, 250 kW A very poor signal was typical during this trip, with the Chinese service barely showing up under 3AW and two other DU English stations (probably 4GM and Norfolk Island). Whenever 3AW was in a fade it had a chance, since other two co-channels were running very low power. Here is the latter situation, with the weak Chinese barely audible under the DU English snarl at 1641 on 4-12 https://dreamcrafts.box.com/s/hysvrh4f7i8u16f3740ch5azam0iervx

1593 CNR1 Changzhou, China, 600 kW This was another Chinese blaster, with S9 signals typical every morning. Here it was at 1641 on 4-12 with male Chinese speech and music // 1377 https://dreamcrafts.box.com/s/unn7d4h3wa9ro7g7wespunkqeaay6f6e


73 and Good DX,

Gary DeBock (DXing in Aitutaki, Cook Islands)

7.5 inch loopstick C.Crane Skywave SSB Ultralight https://dreamcrafts.box.com/s/oephl2ru7ejk31saxdq2tijqx9db0ros + 5 inch TSA-friendly "Frequent Flyer" FSL antenna (Lagoon beach DXing setup photo posted at https://dreamcrafts.box.com/s/p0om9fb2q1yvtq2ffgj3aquyz3seal4h

 

Cook Islands Ultralight DXpedition  View Printable Version 
Friday, April 27 2018

IRCA

 

Cook Islands Ultralight DXpedition  View Printable Version 
Friday, April 27 2018

IRCA
Hi Mark,


<<< Is South America / Central America to Cook Islands simply a path that doesn't work?
So far I haven't heard much about DX that way, which would presumably be happening at or just after sunset on the Cook Islands end.
Mark Connelly, WA1ION
South Yarmouth, MA >>>


There is no doubt that Aitutaki in the Cook islands can provide exceptional sunset DXing for stations in Central and South America, similar to what the sunrise sessions brought in from south and east Asia. There were a couple of factors which made it very awkward for me to spend some serious live DXing time to investigate this propagation, however.


The ostensible reason for our trip to Aitutaki was to celebrate the 38th anniversary of our meeting in Hong Kong, and hobby time needed to be carefully balanced with time spent on my wife's favorite activities (especially snorkeling and lagoon cruise touring, both of which took up many hours each day). She also discovered that sunset pictures along the lagoon beach were unusually attractive in Aitutaki, with the coconut trees framing dazzling colors in the dusky Southern Hemisphere skies. As such, there was rarely time for dedicated sunset DXing to either North or South America during the trip. During these sunset photography sessions, I recalled John B.'s DXpedition to Easter Island (having complete freedom to DX 24 hours a day) with some chagrin, although to be honest, a DXer really does need to have some balance in enjoying other activities to appreciate the full beauty of a dazzling tropical island like Aitutaki.


Every evening I would check propagation about two hours after sunset (after everything was dark), and during these sessions there were six USA mainland stations that crashed the DU-DXing sessions with powerful transoceanic signals. I wasn't really looking for these, but they all managed potent signals on the hot-rodded Ultralight alone, wiping out adjacent 9 kHz-split stations in NZ and Australia. These were 640-KFI, 1070-KNX, 1160-KSL, 1170-KFAQ, 1430-KMRB and 1640-KDIA. Receiving Hawaiian stations were pretty much like shooting fish in a barrel, so i really didn't go after them. Such are the realities of balancing a DXpedition with other vacation activities.


Gary DeBock (in Puyallup, WA, USA)


The other factor was a 150m hill on the northern side of the island, strategically placed in between my lagoon DXing location and the South American location

> On April 27, 2018 at 1:58 PM Mark Connelly via IRCA wrote:
>
>
> _______________________________________________
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>
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> On April 27, 2018 at 1:58 PM Mark Connelly wrote:
>
>
> Is South America / Central America to Cook Islands simply a path that doesn't work?
>
> So far I haven't heard much about DX that way, which would presumably be happening at or just after sunset on the Cook Islands end.
>
> Mark Connelly, WA1ION
> South Yarmouth, MA
>

 

Cook Islands Ultralight DXpedition  View Printable Version 
Friday, April 27 2018

IRCA
John Bryant (Easter Island) and Richard Wood (Hawaii) did OK to South America, so I expect there were factors at work other than propagation.


Chuck

 

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