[Lowfer] Morning lowfers

[Garry]

Attached is an image that sequences through the lowfers (WM then EAR 
then MLS) that can be copied here in daylight (local SIW is lower in 
frequency sending slash code). The frequency scale of the capture 
pertains to the last signal, MLS.

WSPR signals overnight here from WG2XXM were especially strong. That 
should have made for easy copy of NDBs GR (TX) and HHW (OK) on 323 kHz, 
but neither was seen. The problem with the former was perhaps the 
presence of the 324 kHz DGPS station in  Hudson Falls, NY. The latter 
has been reported at a strange offset (only about 880 Hz) and that 
should have been enough to avoid desense. Perhaps it's moved back to a 
normal offset around 1 kHz.

Another local listener reported reception of NDB GTN in the DC area. I 
didn't think that was credible because the heading difference from the 
DGPS station isn't large. Nonetheless, time was spent looking for it 
with the DGPS station nulled as best it could be with a 10' shielded 
loop a la VE7SL. The DGPS background was still noticeably above the 
noise floor but allowed several other NDBs to come through (EBS, HHW, 
and OUK). Nothing was noticed around 1025 Hz offset with 8 second cycle 
time, as expected. However, every so often the DGPS station faded back 
into the noise for several minutes. That occurred around 1100Z and sure 
enough GTN was evident. The longer cycle time than the others helped 
confirm the source.

73, Garry, K3SIW, EN52ta, Elgin, IL
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