As we have found for WSPR activity on 2m and above, the Hepburn
Tropospheric Forecasts pages are very useful.
About a week ago the predictions started looking promising for an opening and this time KH6IMB in Volcan, HI at about 3700' feet was ready with 2m WSPR as were several here in California. If you have been watching the 2m data base lately you may have noticed this first spot
Unlike some of the wrong-band reports we see in the WSPR
database, this one was real and the first one across the path this
year. It was followed by many others, including two spots between
Chris, N3IZN like this one
and one-way spots with Gary, WA6MEM, such as this
In this last spot there *is* a band error, it was actually on 2m,
Wil, KH6IMB's, WSPR band was out of synch with his radio for a few
hours and reported the wrong band.
Although the CW beacons from KH6HME were copiable on several bands for several days here in Northern California, and at N6GN, no WSPR spots resulted even though WA6M who is on a ridge with ocean horizon was transmitting. This time the best duct was south of us.
I asked Wil, KH6IMB, for a .wav file of one of the stronger spots
to examine for any signs of spectral spreading. I'm interested in
this because I have started on a WSPR/JT65/JT9 beacon project that
may replace the CW beacon currently operating at KH6HME on 70cm.
More on this as it gets closer to completion.
Here is a screen shot
I'm also attaching a .wav file that you can decode with WSPR/WSJT-X and/or listen to on an audio device. If you listen you'll hear what a nice strong CW QSO this could have supported. Of course, the nice thing about WSPR is that it can decode down almost a factor of 1000 lower so can provide a spot well before there's any sign of other modes.
QRSS mode (plain on/off keyed slow CW)
- FSK/CW mode (frequency shift keyed slow CW)
- DFCW mode (dual frequency CW)
- WSPR mode (Weak Signal Propagation Reporter)
- WSPR-15 experimental WSPR mode with 15-minute frames
- Opera modes (8 speeds)
- PI4 beacon mode
- JT9 modes (5 speeds)
- Slow-Hellschreiber (frequency shifted slow-Hell)
- Full-speed Hellshreiber
- Half-speed ("DX") Hellshreiber
- CW (plain CW)
- FSK (0-999Hz shift, fast-speed FSK CW)
- Customisable FSK patterns
- manually-keyed CW/FSK transmitter
- JT65 modes
- ISCAT-A and B
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I am surprised and happy to see that KH6IMB was even heard at all due to his location, so this is quite exciting.
Obviously there is a path to the south. :-)
2016-07-26 22:38 N3IZN 144.490547 -12
0 DM13ji 100 KH6IMB BK29jk 4061 257
Maybe elevation is too low up here.
432? Sorry.. Don't ask! At least it came out of the box and the boom is mostly assembled!
I was aiming my comment to KH6IMB. I wanted to know if he could copy KH6HME at his QTH which is very much not line of sight to Volcano
No implication that the path was in to CA.
When you wrote noise I first interpreted it as "noise on the tropo forum". But from your posting there
S3 but none of the hash I usually hear when the beacon is inI think you are talking about something that you often see coincident with a duct.
Can you describe this? This is the first I've heard of it.
A short write-up of the beacon should appear in the May 2017 QST, World Above 50 MHz column.