HFU HF Underground
Technical Topics => SDR - Software Defined Radio => Topic started by: ChrisSmolinski on August 21, 2019, 1535 UTC
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Another SDR DGPS shootout, this time the original AirSpyHF+ vs the new Discovery. Again, the 950 ft Log antenna through a low pass filter and splitter, so each SDR was running at the same time. I ran two instances of SDR# to keep things as fair as possible. The test was run mid morning, so not much DX expected, although Card Sound FL was a nice catch.
The DGPS band is 285-325 kHz, so these results may be applicable to NDB enthusiasts as well.
The 950 ft LoG (Loop on Ground) antenna is fed via one of my Cyclops antenna transformers and then coax to the shack
https://www.blackcatsystems.com/rf-products/cyclops_rf_ham_shortwave_radio_matching_transformer.html
All decoding done with Amalgamated DGPS of course, the premier DGPS decoding software. https://www.blackcatsystems.com/software/dgps_decoding_software_sdr.html
Another win for the Discovery, not only did it have more decodes for each station, it picked up two stations missed by the original version.
AirSpyHF+ (Original Version)
Count ID ref1 ref2 kHz Baud City Country Lat Lon km Deg
248 778 192 193 292.0 100 Kensington, SC United States 33.491 -79.349 723 198
14 929 312 313 296.0 200 St Jean Richelieu, QC Canada 45.324 -73.317 693 24
4362 772 198 199 306.0 200 Acushnet, MA United States 41.749 -70.889 561 64
4229 844 094 095 324.0 200 Hudson Falls, NY United States 43.272 -73.542 489 35
1673 839 118 119 322.0 100 Youngstown, NY United States 43.239 -78.972 427 338
3321 803 006 007 293.0 100 Moriches, NY United States 40.794 -72.756 378 70
3394 806 012 013 289.0 100 Driver, VA United States 36.963 -76.562 307 173
5235 804 008 009 286.0 200 Sandy Hook, NJ United States 40.475 -74.02 266 70
Discovery (New version)
Count ID ref1 ref2 kHz Baud City Country Lat Lon km Deg
64 808 016 017 314.0 200 Card Sound, FL United States 25.442 -80.452 1,619 193
1272 778 192 193 292.0 100 Kensington, SC United States 33.491 -79.349 723 198
768 929 312 313 296.0 200 St Jean Richelieu, QC Canada 45.324 -73.317 693 24
119 838 116 117 319.0 200 Detroit, MI United States 42.306 -83.103 590 301
4762 772 198 199 306.0 200 Acushnet, MA United States 41.749 -70.889 561 64
4583 844 094 095 324.0 200 Hudson Falls, NY United States 43.272 -73.542 489 35
1842 839 118 119 322.0 100 Youngstown, NY United States 43.239 -78.972 427 338
3490 803 006 007 293.0 100 Moriches, NY United States 40.794 -72.756 378 70
3295 806 012 013 289.0 100 Driver, VA United States 36.963 -76.562 307 173
5309 804 008 009 286.0 200 Sandy Hook, NJ United States 40.475 -74.02 266 70