HFU HF Underground
Technical Topics => SDR - Software Defined Radio => Topic started by: ChrisSmolinski on August 21, 2019, 2209 UTC
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Another SDR DGPS shootout, this time the ancient RF Space SDR-14 vs AirSpyHF+ 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 late afternoon / early evening, a few hours before sunset, so still no amazing DX expcted.
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
A mixed bag, but while there were some stations the SDR-14 got more decodes from, and others the Discovery got more, the SDR-14 picked up two stations missed by the Discovery. I was surprised, but there you go.
SDR-14
Count ID ref1 ref2 kHz Baud City Country Lat Lon km Deg
4 808 016 017 314.0 200 Card Sound, FL United States 25.442 -80.452 1,619 193
6 799 044 045 290.0 200 Penobscot, ME United States 44.453 -68.776 858 49
399 778 192 193 292.0 100 Kensington, SC United States 33.491 -79.349 723 198
3 929 312 313 296.0 200 St Jean Richelieu, QC Canada 45.324 -73.317 693 24
10 838 116 117 319.0 200 Detroit, MI United States 42.306 -83.103 590 301
3318 772 198 199 306.0 200 Acushnet, MA United States 41.749 -70.889 561 64
3517 844 094 095 324.0 200 Hudson Falls, NY United States 43.272 -73.542 489 35
1164 839 118 119 322.0 100 Youngstown, NY United States 43.239 -78.972 427 338
3217 803 006 007 293.0 100 Moriches, NY United States 40.794 -72.756 378 70
3054 806 012 013 289.0 100 Driver, VA United States 36.963 -76.562 307 173
5008 804 008 009 286.0 200 Sandy Hook, NJ United States 40.475 -74.02 266 70
AirSpyHF+ Discovery:
Count ID ref1 ref2 kHz Baud City Country Lat Lon km Deg
21 799 044 045 290.0 200 Penobscot, ME United States 44.453 -68.776 858 49
204 778 192 193 292.0 100 Kensington, SC United States 33.491 -79.349 723 198
3 838 116 117 319.0 200 Detroit, MI United States 42.306 -83.103 590 301
2016 772 198 199 306.0 200 Acushnet, MA United States 41.749 -70.889 561 64
2643 844 094 095 324.0 200 Hudson Falls, NY United States 43.272 -73.542 489 35
628 839 118 119 322.0 100 Youngstown, NY United States 43.239 -78.972 427 338
3056 803 006 007 293.0 100 Moriches, NY United States 40.794 -72.756 378 70
3279 806 012 013 289.0 100 Driver, VA United States 36.963 -76.562 307 173
5041 804 008 009 286.0 200 Sandy Hook, NJ United States 40.475 -74.02 266 70