HFU HF Underground
Loggings => DGPS => Topic started by: ChrisSmolinski on February 13, 2018, 1614 UTC
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You know it was a good night for DGPS when the fact that I got two stations from Alaska is not the lead story. This was literally the best night ever for DGPS since I started listening a few years ago.
Europe:
Helgoland Germany
Flamborough Head Lt England
Wormleighton England
Cabo Carvoeiro Lt Portugal
Nash Point Lt Wales
Sumburgh Shetland Isles
Point Lynas Lt Wales
Butt of Lewis Lt Scotland
Tory Island Lt Ireland
I actually got 3 decodes from Helgoland Germany back in March of 2017: https://www.hfunderground.com/board/index.php/topic,33582.msg125358.html#msg125358
Curiously, I have not received Madeira the last few days, maybe it is off the air?
Flamborough Head Lt England:
Tuesday, February 13, 2018 04:15:15
Tuesday, February 13, 2018 04:15:26
Tuesday, February 13, 2018 04:15:50
Wormleighton England:
Tuesday, February 13, 2018 04:17:30
Tuesday, February 13, 2018 04:44:54
Tuesday, February 13, 2018 05:22:50
Nash Point Lt Wales:
Tuesday, February 13, 2018 05:17:27
Tuesday, February 13, 2018 05:20:17
Tuesday, February 13, 2018 05:20:25
Tuesday, February 13, 2018 05:20:31
Tuesday, February 13, 2018 05:20:59
Tuesday, February 13, 2018 05:22:59
Tuesday, February 13, 2018 05:23:07
Tuesday, February 13, 2018 05:23:45
14522 decodes from Richmond BC may be a record. Tofino is tough here. Oh and two Alaska stations. Alert Bay did not appear this time, nor did Robinson Point, WA which I do not think I have ever received, 323 kHz is blocked here by an NDB.
Count ID ref1 ref2 kHz Baud City Country Lat Lon km Deg
2 745 000 130 308.0 200 Pedra Branca (Horsburgh) Singapore 1.339 104.409 15,450 358
4482 100 400 401 296.0 100 Okha [Humani Pt] India 22.481 69.071 12,255 33
12 614 628 629 295.0 200 Shitang China 28.267 121.617 12,216 343
6 324 448 449 307.0 200 Mersa Martruh Egypt 31.365 27.256 8,913 57
48 492 762 001 298.5 100 Helgoland Germany 54.183 7.883 6,233 45
3 447 687 697 290.5 100 Flamborough Head Lt England 54.126 -0.091 5,748 47
3 439 691 001 291.0 100 Wormleighton England 52.208 -1.374 5,730 49
304 340 480 481 311.5 200 Cabo Carvoeiro Lt Portugal 39.365 -9.411 5,648 67
8 449 689 699 309.5 100 Nash Point Lt Wales 51.401 -3.552 5,614 51
163 445 685 695 291.5 100 Sumburgh Shetland Isles 59.869 -1.276 5,517 40
53 442 682 692 297.5 100 Point Lynas Lt Wales 53.427 -4.292 5,504 48
58 444 684 694 295.5 100 Butt of Lewis Lt Scotland 58.526 -6.27 5,265 42
45 435 670 671 288.5 100 Tory Island Lt Ireland 55.267 -8.25 5,208 47
7 890 280 281 305.0 100 Biorka, AK Alaska 56.858 -135.546 4,564 315
34 891 282 283 295.0 100 Level Island, AK Alaska 56.467 -133.098 4,415 314
1025 342 484 485 308.0 200 Horta Azores 38.533 -28.617 4,122 76
89 908 302 303 315.0 200 Tofino [Amphitrite Point], BC Canada 48.931 -125.545 3,926 302
81 883 266 267 287.0 100 Pigeon Point, CA United States 37.189 -122.394 3,923 281
10032 886 272 273 287.0 100 Fort Stevens, OR United States 46.208 -123.96 3,834 297
1451 764 210 211 314.0 200 Lincoln, CA United States 38.855 -121.361 3,782 283
14522 907 304 305 320.0 200 Richmond, BC Canada 49.114 -123.183 3,753 302
176 888 276 277 302.0 100 Whidbey Island, WA United States 48.322 -122.706 3,721 300
2398 881 262 263 302.0 100 Point Loma, CA United States 32.677 -117.25 3,666 271
1167 871 172 173 300.0 100 Appleton, WA United States 45.792 -121.332 3,637 296
7494 972 901 902 302.0 200 Miraflores Panama 8.993 -79.585 3,425 185
1342 946 344 345 299.0 200 Rigolet, NL Canada 54.25 -58.5 2,127 34
34708 944 342 343 310.0 200 Cape Norman, NL Canada 51.509 -55.831 2,091 44
15020 940 338 339 315.0 200 Cape Race, NL Canada 46.661 -53.075 2,076 60
255 828 246 247 301.0 100 Angleton, TX United States 29.301 -95.484 2,046 241
43341 942 340 341 288.0 200 Cape Ray, NL Canada 47.636 -59.241 1,671 52
41122 808 016 017 314.0 200 Card Sound, FL United States 25.442 -80.452 1,619 193
1127 814 028 029 293.0 200 English Turn, LA United States 29.886 -89.947 1,608 231
4482 830 100 101 296.0 100 Wisconsin, Point WI United States 46.708 -92.025 1,444 308
39623 925 320 321 313.0 200 Moise, QC Canada 50.202 -66.119 1,443 32
16022 934 336 337 307.0 200 Fox Island, NS Canada 45.361 -61.097 1,442 59
27417 827 244 245 312.0 200 Tampa, FL United States 27.85 -82.543 1,414 203
50742 792 136 137 297.0 200 Bobo, MS United States 34.125 -90.696 1,367 247
2407 809 018 019 289.0 100 Cape Canaveral, FL United States 28.467 -80.554 1,292 196
1987 936 332 333 319.0 200 Point Escuminac, NB Canada 47.075 -64.8 1,278 46
3 865 160 161 320.0 200 Millers Ferry, AL United States 32.095 -87.397 1,262 231
22725 831 102 103 298.0 100 Upper Keweenaw, MI United States 47.233 -88.628 1,257 316
3570 937 330 331 298.0 200 Hartlen Point, NS Canada 44.583 -63.45 1,238 60
11692 935 334 335 312.0 200 Western Head, NS Canada 43.993 -64.67 1,124 61
40419 939 326 327 295.0 200 Partridge Island, NB Canada 45.239 -66.056 1,085 52
41266 926 318 319 300.0 200 Riviere du Loop, QC Canada 47.762 -69.606 1,073 31
50303 777 218 219 304.0 200 Mequon, WI United States 43.202 -88.066 1,002 296
47197 927 316 317 309.0 200 Lauzon, QC Canada 46.821 -71.165 920 29
1077 836 112 113 292.0 200 Cheboygan, MI United States 45.656 -84.475 901 320
50874 799 044 045 290.0 200 Penobscot, ME United States 44.453 -68.776 858 49
29214 778 192 193 292.0 100 Kensington, SC United States 33.491 -79.349 723 198
37287 929 312 313 296.0 200 St Jean Richelieu, QC Canada 45.324 -73.317 693 24
45446 838 116 117 319.0 200 Detroit, MI United States 42.306 -83.103 590 301
172 919 308 309 306.0 200 Cardinal, ON Canada 44.783 -75.417 579 12
49888 772 198 199 306.0 200 Acushnet, MA United States 41.749 -70.889 561 64
31395 771 196 197 294.0 100 New Bern, NC United States 35.181 -77.059 503 181
50785 844 094 095 324.0 200 Hudson Falls, NY United States 43.272 -73.542 489 35
31715 839 118 119 322.0 100 Youngstown, NY United States 43.239 -78.972 427 338
30051 803 006 007 293.0 100 Moriches, NY United States 40.794 -72.756 378 70
25694 806 012 013 289.0 100 Driver, VA United States 36.963 -76.562 307 173
48295 847 058 059 301.0 200 Annapolis, MD United States 39.018 -76.61 82 158
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Chris, as far as I remember, I never heard Madeira in the last week. It must be off...
I am checking my reception here in early evening - interesting, that the DGPS from France, which has same ID than the Brazil produces NO decode in whole early evening...
May be it is off, although, that some people in Europe say they have decoded it...
It my be a small transmitter only, but I am sure, I would hear it also, if Germans say, they have heard...
So my be Brazil was true and the French one was wrong. I got decodes at 22hxx utc - so that is possible.. will check again this evening.
Great your European spots! What is your antenna now ?
Note, that 4x coplanar magnet loops may be not ideal for such low frequency - although inductance go down, the cutoff frequency is may be too high for NDB band...
Chavdar (LZ1AQ) has written a special article, what kind of loop may be best for using on NDB band - in case of CC-loops you should try larger elements around a 30foot fiber mast or a tree...
Otherwise you can try EWE antenna - I measured 15db f/b ratio, which is respectable on 300kHz and which helps to get noise down...
Ulli, ON5KQ
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This was using the 500 foot beverage antenna. I also ran using the crossed parallel loop on another receiver, but did not get as good results, as you mentioned that antenna is not ideal for the NDB band.
Your EWE antenna does appear to work very well. I need to see if I can build something like that here.
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Very, very nice!
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Chris, about the EWE antenna:
It seems possible to even use smaller EWE's , if you can install a pre-amp at the feedpoint just after the matching transformer (which you still should use!)
I modelled a EWE size of 10m up, 30m horizontal, 10m down to swamping resistor
This is half the size of my EWE. However directivity still very good, but signal output less - about 6db less according to NEC2 engine.
I do not trust the NEC2 engine too much however, because the EWE is an antenna against ground. NEC2 cannot model ground too well especially not the consequences of buried radials.
So, as soon as weather permits (it is lousy cold here at the moment...) I will make some efficiency tests against my large EWE, which becomes a permanent installation now. I will post the results here.
The goal is, to find out, how small you can get, without sacrify too much on signal output (efficiency), which as a result would introduce serious problems with noise ingress via common-mode, etc... (degradation of S/N and directivity)
Ulli, ON5KQ
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I look forward to your tests, Ulli. I am considering putting up a EWE for the 48 meter band, aimed towards Europe for pirates. I thought that might make a good first test, as the antenna will not need to be very large. Can you recommend any specific sites for EWE theory/design?
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Chris,
unfortunately I don't know a good website for EWE antenna.
However for 48m band, you should use your CC loops - they should work great!
the EWE is not intended for use above 5Mhz, mostly below 3Mhz.
Because if the frequency becomes higher, you would loose the clean cardiode pattern !
For 40m you could use a Beverage also , nothing beats a 2-3 wavelength Beverage, carefully matched to the feedline with the correct swamping resistor.
I made S/N comparisons on 40m using WSPR-mode as well as CW as follows:
my 170m long Beverage always have at least 10db better s/n ratio than my single active vertical
Difference on extreme distance (eastern Australia) could be even more!
Ozy radio I can copy every afternoon, but only on the beverage (5045kHz)...
The EWE is typical a winter antenna used on mediumwave an lower in frequency!
Therefore it was a candidate to try it on 300khz!
Ulli, ON5KQ