HFU HF Underground
Technical Topics => SDR - Software Defined Radio => Topic started by: ChrisSmolinski on August 21, 2019, 1628 UTC
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Another SDR DGPS shootout, this time the SDRplay RSP1A vs RSPduo. 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 late morning, so not much DX expected. I used the Hi-Z port on the RSPduo, fed with one of my Cyclops transformers in reverse, which seems to produce higher signal levels vs the COAX input.
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 win for the RSPduo, not only did it have more decodes for each station, it picked up four stations missed by the RSP1A.
RSP1A
Count ID ref1 ref2 kHz Baud City Country Lat Lon km Deg
824 772 198 199 306.0 200 Acushnet, MA United States 41.749 -70.889 561 64
822 844 094 095 324.0 200 Hudson Falls, NY United States 43.272 -73.542 489 35
366 839 118 119 322.0 100 Youngstown, NY United States 43.239 -78.972 427 338
605 803 006 007 293.0 100 Moriches, NY United States 40.794 -72.756 378 70
620 806 012 013 289.0 100 Driver, VA United States 36.963 -76.562 307 173
963 804 008 009 286.0 200 Sandy Hook, NJ United States 40.475 -74.02 266 70
RSPduo:
Count ID ref1 ref2 kHz Baud City Country Lat Lon km Deg
7 799 044 045 290.0 200 Penobscot, ME United States 44.453 -68.776 858 49
313 778 192 193 292.0 100 Kensington, SC United States 33.491 -79.349 723 198
62 929 312 313 296.0 200 St Jean Richelieu, QC Canada 45.324 -73.317 693 24
115 838 116 117 319.0 200 Detroit, MI United States 42.306 -83.103 590 301
943 772 198 199 306.0 200 Acushnet, MA United States 41.749 -70.889 561 64
978 844 094 095 324.0 200 Hudson Falls, NY United States 43.272 -73.542 489 35
396 839 118 119 322.0 100 Youngstown, NY United States 43.239 -78.972 427 338
651 803 006 007 293.0 100 Moriches, NY United States 40.794 -72.756 378 70
647 806 012 013 289.0 100 Driver, VA United States 36.963 -76.562 307 173
1029 804 008 009 286.0 200 Sandy Hook, NJ United States 40.475 -74.02 266 70