I have had the Ferrite NDB loop outdoors for a week now, and things are looking good with one major exception. I lost my noise floor to the tune of ~20dB, and this would be a game-ender if not solved. It was quickly determined that I had a major ground loop problem due to the fact that the loop is serviced by 3 long cables (power, RF coax, and a data cable) each with their own ground.
To date, the most effective solution has been isolating the RF ground by place a 1:1 isolation transformer (8+8 turns on an FT-190-J core) in the RF return signal path from the loop amp. This has provided relief to the point where the ground loop noise created by the USB link is now dominant, and is probably creating a noise floor about 6dB above where I think it should be. Hopefully, maybe a USB Isolator will help to clean up the rest of the noise/garbage, but for the time being, I can live with the current floor.
I have been waiting for a dead-cat bounce on solar activity, but that apparently is not happening. Conditions were good enough to get some reasonable logs yesterday afternoon/evening.
224.0 MO Moosonee, ON, CAN (2015-09-17 0051)
230.0 QB Quebec, QC, CAN (2015-09-17 0055)
245.0 YZE Gore Bay, ON, CAN (2015-09-16 2045)
248.0 WG Winnipeg, MB, CAN (2015-09-17 0102)
260.0 YAT Wapisk' Attawapiskat, ON, CAN (2015-09-17 0108)
326.0 VV Wiarton, ON, CAN (2015-09-16 2110)
351.0 YKQ Waskaganish, QC, CAN (2015-09-17 0111)
353.0 QG Saint Clair Beach (Windsor), ON, CAN (2015-09-17 0112)
362.0 SB Sudbury, ON, CAN (2015-09-17 0115)
366.0 YMW Maniwaki, QC, CAN (2015-09-17 0116)
371.0 GW Jarpik Kuujjuarapik, QC, CAN (2015-09-17 0120)
381.5 SJX St James' Beaver Island, MI, USA (2015-09-17 0124)
382.0 YPL Pickle Lake, ON, CAN (2015-09-17 0125)
396.0 YPH Inukjuak, QC, CAN (2015-09-17 0127)
Nothing really astounding, but the fact that YZE 245 and VV 326 were logged well before local sunset is interesting. I also had the opportunity to test nulling ability using a Radio Shack Rotator. In most cases, nulls or depressions of typically 24dB were attained via loop rotation, and this should be a great help when the season really gets going.