Dear LF Group,
I recorded spectrograms around 137.790kHz last night through this morning,
hoping to catch ZL6QH and VA3LK - nothing seen, however. I was using 2
receivers, one connected to the loop antenna, and one connected to my TX
wire, in the hope of improving chances of reception - but there seemed to
be little difference between the two. I will be recording again later this
afternoon until at least 1700.
I would echo John's comments about the two closely spaced lines just either
side of 137.790 - When I checked a few days ago, I could not see them, but
perhaps it was not late enough at night. If the ZL6QH "dash" frequency is
exactly right, it should fall between the two lines, but this would require
accuracy of a couple of parts in 10^7. Shifting the frequency up or down a
fraction of a hertz would be a safer bet. The double lines fade in and out
slowly; at my QTH they weren't really visible by 0700utc. As I recall from
last winter, they usually disappear well before dawn, so perhaps not a
problem really.
Cheers, Jim Moritz
73 de M0BMU
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