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#1
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Just back from our fabulous DXpedition site at Jongensgat on the
Indian Ocean. Heard during our latest Jongensgat DXpedition: 25th August 2009 Sunrise was 0502z 1670 kHz 0500z "WFSM" Dry Branch GA "Fox Sports 1670" a 1 kw station 13,200 km's/8,200miles away. And: 1500 kHz 0400z "WAKE" Valparaiso IN "CNN Radio" at only 25 watts nightime power 13,900 km's/8,600 miles away (near Gary Indiana and Lake Michigan). RX Icom IC-7600 with 350m beverage on ground My previous best low power catch was: 1,410 kHz 0139z 04/10/04 WKKP MCDONOUGH, GA USA 58 watt nightime power My pal Gary Deacon got 530 Falklands Island at 0600z the same time on a Sony ULR You may wonder how one can get a catch on the BCB MW band so far away, as the theory of "skip" shows it is not possible. But there is another theory that by "ducting" is how the signal arrives so far away. In this theory the signal from the transmitter gets caught up in the ionosphere and travels huge distances in it before randomly coming back down to earth. How you catch these faint ducted signals is pure chance and requires a bit of diligence by the operator, and of course luck and a good antenna. Have fun and good DX John Plimmer, Montagu, Western Cape Province, South Africa South 33 d 47 m 32 s, East 20 d 07 m 32 s Icom IC-7600, ERGO software Drake SW8. Sangean 803A, Eton E100 Sony 7600D, GE SRIII, Redsun RP2100 Antenna's RF Systems DX 1 Pro Mk II, Datong AD-270 Kiwa MW Loop. http://www.dxing.info/about/dxers/plimmer.dx |
#2
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![]() John Plimmer wrote: Just back from our fabulous DXpedition site at Jongensgat on the Indian Ocean. Heard during our latest Jongensgat DXpedition: 25th August 2009 Sunrise was 0502z 1670 kHz 0500z "WFSM" Dry Branch GA "Fox Sports 1670" a 1 kw station 13,200 km's/8,200miles away. And: 1500 kHz 0400z "WAKE" Valparaiso IN "CNN Radio" at only 25 watts nightime power 13,900 km's/8,600 miles away (near Gary Indiana and Lake Michigan). RX Icom IC-7600 with 350m beverage on ground My previous best low power catch was: 1,410 kHz 0139z 04/10/04 WKKP MCDONOUGH, GA USA 58 watt nightime power My pal Gary Deacon got 530 Falklands Island at 0600z the same time on a Sony ULR You may wonder how one can get a catch on the BCB MW band so far away, as the theory of "skip" shows it is not possible. But there is another theory that by "ducting" is how the signal arrives so far away. In this theory the signal from the transmitter gets caught up in the ionosphere and travels huge distances in it before randomly coming back down to earth. How you catch these faint ducted signals is pure chance and requires a bit of diligence by the operator, and of course luck and a good antenna. I've long believed in 'ducting' vs. the signal making 'hops' or 'bounces'. dxAce Michigan USA |
#3
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dxAce wrote:
You may wonder how one can get a catch on the BCB MW band so far away, as the theory of "skip" shows it is not possible. But there is another theory that by "ducting" is how the signal arrives so far away. In this theory the signal from the transmitter gets caught up in the ionosphere and travels huge distances in it before randomly coming back down to earth. How you catch these faint ducted signals is pure chance and requires a bit of diligence by the operator, and of course luck and a good antenna. I've long believed in 'ducting' vs. the signal making 'hops' or 'bounces'. dxAce Michigan USA I get KOMO in Seattle (1000 kHz) via some kind of virtual waveguide. There is never any selective fading. It sounds like groundwave. They are 900 miles away. I think the Central Valley, the Pacific Ocean, and the Rocky Mountains have something to do with it. Ducting is responsible for a VHF path between Los Angeles and Hawaii. |
#4
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On Aug 29, 5:26*am, John Plimmer wrote:
Just back from our fabulous DXpedition site at Jongensgat on the Indian Ocean. Heard during our latest Jongensgat DXpedition: 25th August 2009 Sunrise was 0502z 1670 kHz 0500z "WFSM" Dry Branch GA "Fox Sports 1670" a 1 kw station 13,200 km's/8,200miles away. And: 1500 kHz 0400z "WAKE" Valparaiso IN "CNN Radio" at only 25 watts nightime power 13,900 km's/8,600 miles away (near Gary Indiana and Lake Michigan). RX Icom IC-7600 with 350m beverage on ground My previous best low power catch was: * *1,410 kHz 0139z 04/10/04 WKKP MCDONOUGH, GA USA 58 watt nightime power My pal Gary Deacon got 530 Falklands Island at 0600z the same time on a Sony ULR You may wonder how one can get a catch on the BCB MW band so far away, as the theory of "skip" shows it is not possible. But there is another theory that by "ducting" is how the signal arrives so far away. In this theory the signal from the transmitter gets caught up in the ionosphere and travels huge distances in it before randomly coming back down to earth. How you catch these faint ducted signals is pure chance and requires a bit of diligence by the operator, and of course luck and a good antenna. Have fun and good DX John Plimmer, Montagu, Western Cape Province, South Africa South 33 d 47 m 32 s, East 20 d 07 m 32 s Icom IC-7600, ERGO software Drake SW8. Sangean 803A, Eton E100 Sony 7600D, GE SRIII, Redsun RP2100 Antenna's RF Systems DX 1 Pro Mk II, Datong AD-270 Kiwa MW Loop.http://www.dxing.info/about/dxers/plimmer.dx Great post John, superb catches. |
#5
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On Aug 29, 11:26*am, John Plimmer wrote:
Just back from our fabulous DXpedition site at Jongensgat on the Indian Ocean. Heard during our latest Jongensgat DXpedition: 25th August 2009 Sunrise was 0502z 1670 kHz 0500z "WFSM" Dry Branch GA "Fox Sports 1670" a 1 kw station 13,200 km's/8,200miles away. And: 1500 kHz 0400z "WAKE" Valparaiso IN "CNN Radio" at only 25 watts nightime power 13,900 km's/8,600 miles away (near Gary Indiana and Lake Michigan). RX Icom IC-7600 with 350m beverage on ground My previous best low power catch was: * *1,410 kHz 0139z 04/10/04 WKKP MCDONOUGH, GA USA 58 watt nightime power My pal Gary Deacon got 530 Falklands Island at 0600z the same time on a Sony ULR You may wonder how one can get a catch on the BCB MW band so far away, as the theory of "skip" shows it is not possible. But there is another theory that by "ducting" is how the signal arrives so far away. In this theory the signal from the transmitter gets caught up in the ionosphere and travels huge distances in it before randomly coming back down to earth. How you catch these faint ducted signals is pure chance and requires a bit of diligence by the operator, and of course luck and a good antenna. Have fun and good DX John Plimmer, Montagu, Western Cape Province, South Africa South 33 d 47 m 32 s, East 20 d 07 m 32 s Icom IC-7600, ERGO software Drake SW8. Sangean 803A, Eton E100 Sony 7600D, GE SRIII, Redsun RP2100 Antenna's RF Systems DX 1 Pro Mk II, Datong AD-270 Kiwa MW Loop.http://www.dxing.info/about/dxers/plimmer.dx Forgot to add the following SW catches: 8942 kHz Singapore aeradio wkg various 8915 kHz San Francisco air via Honolulu relay wkg Japanair at 160 East. This is at my antipode and very very far away. 8888 kHz Luanda wkg Air Angola 8879 Khz Seychelles wkg Air France & Mumbai wkg Marine 730 3395 kHz RRI Kendari 4750 kHz RRI Makassar // 3395 Also a bit of LF NDB DXing, best of which was: 400 kHz "CAX" CW NDB Caxias (Rio D J) 6,350 kms/3,900 miles away Have fun and good DX John Plimmer, Montagu, Western Cape Province, South Africa |
#6
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On Aug 29, 5:30*am, dxAce wrote:
I've long believed in 'ducting' vs. the signal making 'hops' or 'bounces'.. dxAce Michigan USA I wonder if wrapping an antenna in DUCT tape helps? |
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