[Boatanchors] Re: [AWA] SAQ Transmissions on 17.2KHz
Al Klase
skywaves at webex.net
Thu Jun 30 21:18:37 EDT 2005
Hi Chris, et al,
I don't want to discourage you, but SAQ has been pretty
elusive in North America. Your wire antenna might be OK if
you're in a really quiet place. For most of us, some kind
of loop is our only hope. There's coverage of my last
successful effort in 1998, including an audio recording and
spectrogram, on John Dilks' website at:
http://www.eht.com/oldradio/awa/events/grimeton/grimeton.htm
I'd suggest that anyone intending to listen for SAQ should
make a band scan now, see what common stations they can
hear, and tweak their station for better performance.
Here's an example. The station is essentially as described
in the link above. I can hear atmospheric noise on 17.2
rather than just AC buzz. Stated signal to noise ratios are
how far the signal stands above the adjacent noise as
indicate by Richard Horne's Spectrogram program. See:
http://www.visualizationsoftware.com/gram.html
Flemington, NJ 17:30 EDT, 30 June 2005:
100KHz Loran-C Pulse Modulation S/N = 15dB
60Khz WWVB 1Hz Pulse Amplitude Mod. S/N = 20dB
24KHz NAA MSK (FSK)(weak right now) S/N = 20dB
18.3 Prob. HWU (France) MSK S/N = 6-8dB
Other easily heard stations all MSK/FSK
37.5KHz NRK, Iceland
40.75 NAU, Puerto Rico
73.60 CFH, Halifax, NS
Good luck to all. Get down to the coast is you can, I'm 50
miles inland.
73,
Al
Al Klase - N3FRQ
Flemington, NJ
http://www.skywaves.ar88.net/
Christian R. Fandt wrote:
> Al and everybody,
>
> I just recently got my RBL-3 *finally* debugged, cleaned-up, and running
> quietly (intermittent shorted bypass cap, and I mean *intermittent*, dang
> it! :-)
>
> Anyway, although I have so far to now, a long wire antenna running
> East-West about 130 feet horizontal, I would like to try the rig out by
> hunting SAQ........
>
> Also, would I expect very sloooow CW like some of the government VLF sigs
> from the past, or would it sound like a rather normal fist?
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