[DSP-10] HAARP 6.7 and 7.4 MHz EME reception report.

[Bob Larkin]

Hi Courtney,

Fun stuff!  The experiment was generally very interesting.  Your approach 
was systematic an fruitful, it would appear.  Thanks for posting the whole 
story, not just the successes!

Yes, their format was EME-2 exactly.  They did not use random stirring, 
which was helpful for general reception. But that could be useful for doing 
a long term experiment.  In thinking about it, the DSP-10 audio processor 
"mode" could be hooked to an HF transceiver.  That supports both receive 
and transmit.  The FFT BW is too wide, but if someone wanted to do the 
experiment, I would work with them to narrow it down.  Otherwise, the 
timing and all is there.  The T/R control comes out a parallel port.  I 
don't think all that has been fully tested in EME-2. but again if there are 
any bugs left, I would be glad to help.

If they do another experiment with HAARP, I would like to use the EME-2 
receive mode.

When this came up, Jimmy, W7CQ was receiving on Friday with audible 
success. This got me wanting to listen. I was up at brother Beb, W7SLB's 
house. He was not available, but Saturday evening, I turned on his HF 
receiver, and listened.  He has a sloping 40-m dipole from a 110 ft tower, 
and is out in the country where it is quiet.  I could not hear very many 
returns on 6.9 (the radio switches bands below 7 MHz, and sounds pretty 
dead!), but when they switched to 7.4, I could almost always hear the echo. 
At times the echo was stronger than the direct signal.  I wish I was as 
organized as you in collecting data, though.

I know Jimmy also had some success Saturday, and may want to comment.

In any event, the EME-2 on some HF band sounds like fun!

73, Bob  W7PUA

At 02:40 PM 1/26/2008 -0800, Courtney Duncan wrote:
>It's not exactly DSP-10 related, but the HAARP EME tests near 40
>meters (yes forty meters) last weekend provided a Space Radio
>opportunity.  Their operation was a lot like EME2 mode.  This is my
>reception report to HAARP with the attachment removed.  The full
>report with several interesting screen captures is at the link
>indicated.
>
>Courtney, n5bf/6
>
>Begin forwarded message:
>
>
>I copied the HAARP EME tests on 2008 January 20 UTC on both frequencies.
>
>This is N5BF/6 located at 34.212 North, 118.222 West on the north rim
>of the Los Angeles basin.  Receiver was a Kenwood TS-680 amateur
>transceiver with general coverage high frequency reception.  The main
>antenna was a Gap Voyager DX-IV four band vertical (160, 80, 40, and
>20), known to perform best on 40 meters.
>
>The transceiver was coupled to Argo, a PC based audio signal
>integration program from which I made several instructive screen
>captures.  One of the better ones is attached here.  Time in the
>display is local, Pacific Standard Time:  UTC - 8.
>
>
>A more complete report with additional screen captures appears on my
>website.
>
>http://cbduncan.110mb.com/HamRadio/Dsp10/PhaseFive/Haarp/Haarp.html
>
>Thank you for providing this opportunity by announcing your tests.
>
>73,
>
>Courtney Duncan, n5bf/6
>>courtney.duncan at ieee.org
>>n5bf at amsat.org