More WSPR/MEPT developments…

This morning I was scanning my WSPR logs and my MEPT screenshots for the night. It seemed to be pretty good. I had quite a number of spots into Australia overnight: both from VK6DI (who is nearing the end of his time in VK6 land, we hope to see you again back on the eastern side of Australia) and from a newcomer: VK2DAG. Checking back through my MEPT screenshots, I was hoping to get some nice shots from VK2ZAY, but he was pretty marginal, and there was very definitely some spreading in frequency. But I was pleased to find a few nice beacon messages from Eric, WY7USA, running at 500mw:

scr00038

Addendum: A couple of hours later….

w7usa

Thanks Eric!

VK6DI spots my MEPT beacon…

I just got mail from David, VK6DI. He’s reported spots of my WSPR beacon a few times in the last few days, and I’ve been trying to see if his grabber shows my MEPT beacon (the MV”). He sent me an email today, with the following screen grab:

moz-screenshot-952

Yep, that’s my beacon. Running an output power of about 2 watts into my low dipole (average height maybe an astounding 12 feet).

Aircraft reflection? Or something else?

This duplicates a posting I made on the wsprnet.org website.

Aircraft reflection? Or something else? | WSPRnet
On Saturday, Jan 10th, I had my transmit-only beacon that I wrote sending both a visual MEPT indicator (the MV that you can see in the attached image) and the WSPR beacon, and tried out a simple program that simultaneously records, and later makes an FFT display of that portion of the band.

It seems to work!

I’m curious though about the brighter of the wspr messages visible here, which seems to have a shadow which arcs down to meet it. Is this the result of an aircraft reflection? There are some fairly close stations here (such as NN6RF) which conceivably could be reflecting off aircraft landing at Oakland airport, but I’m surprised that the signal level could be so high on the 30m band. I believe that such reflections can only occur if the source is reasonably close to the aircraft, correct?

aircraft

I see a couple of other, similar traces in the 2 hour recording I did, which you can peruse here.

MEPT beacon visible in Ohio

W8LIW’s grabber on 30m is currently showing my “MV” beacon transmissions as well as the DFCW of VE1VDM (I presume) and the flying W of W1BW, as well as the faint sawtooth of WB3ANQ. I can’t spot myself on W1BW’s grabber at the moment: my ability to get into Concord, MA seems limited over the last few weeks.

W8LIW 30m Grabber 1/06/2008

K6HX beaconing on 30m with WSPR/MEPT

Okay, I hadn’t been doing any WSPR beacon operations since before Thanksgiving (which was also before my new callsign) and I was kind of bored today, so I dug out my power supply, tuner and interface and set my computer beaconing again on 30m. It’s a combination beacon: using WSPR above 10.140100, and a visual “MV” written as part of a sawtooth in the visual MEPT portion of the band (between 10.140000 and 10.140100 Mhz). Output power is about 4 watts, split between both signals.

I’d be interested in any reception reports.

Addendum: Click this link to examine the reception reports I’m getting via the automated WSPR logging.

Addendum2:

Today, on Jan 2, I got a reception report from W1BW, and I could faintly see my “MV” appearing on his grabber:

MV on the W1BW grabber

You can see his “flying W” very strongly, and if you stare really close (click on the smaller image) you can see my MV which looks like part of a sawtooth around 23:22 (and other places).

Addendum2: Alan, VA3STL in Ontario also noticed my signal on the 2nd. Here is his screen grab, showing both my MV and my MEPT signal.

va3stl