More on the 8.97kHz DX by DK7FC yesterday

This is a combination of two screen shots showing the signal received in the UK (830kms!) and in Germany (180kms) from the 8.97kHz VLF test transmission by DK7FC.  The antenna was a kite supported vertical.  See http://www.qrz.com/db/DK7FC for more info and pictures. This was the email I got from Marcus DF6NM when I asked if the transmission had been definitely identified:

Dear Roger,

well, I think yes.

Attached are the two spectrograms from Paul (top) and myself (bottom), stretched to the same timescale 14:00 to 18:00 UT. The frequency was accurately as stated before, within a few milliHertz. This also was the first time I have seen a stable carrier, in a week since I started my grabber.

The indicated QRSS 120 message is only my guess of what Stefan might have started to send, before suddenly quitting. He had actually mentioned before that his generator might be running out of fuel sooner or later.

For receive, Paul used a pair of magnetic loops, with automatic beam steering for minimum noise. I have my LF Marconi, currently lowered to 3 m above the roof. The VLF signals are tapped off at the foot of the transformer coupled LF receiver input, using a 33 nF capacitor inserted into the ground line.

Best 73,

MArkus (DF6NM)

WSPR and 6m transatlantic testing

In a few months time 6m will start to open reliably for multi-hop sporadic-E propagation. This year, we have a new tool to help investigate really long distance openings across the Atlantic - WSPR. With enough WSPR stations both in UK and Europe and across the pond in W/VE and the Caribbean, we will have an excellent means of tracking transient openings at any time of the day or night. I for one plan to run my WSPR station almost 24/7 when not actually working live on 6m SSB and CW. I hope many others will join in the experiments.

8.97kHz - REAL amateur VLF DX at last

As I write, the amateur transmission tests from Germany on 8.97kHz are ongoing, but it looks like the signals are being received in the north of England - a distance of many hundreds of kilometres. More in a few hours when details become clearer. If confirmed this will certainly be a new amateur record distance. The distance from Frankfurt to Todmorden is believed to be a staggering 830km  ...and this on 8.97kHz!!

10m open

Several Italians coming through on 28MHz WSPR this morning and giving me respectable reports with 1W into my halo. Not sure if this is sporadic-E or F layer. Also coming through around 11.30am was  the 5W WSPR signal from FR1GZ (Reunion Is) at -24dB S/N.

This afternoon another interesting exchange of WSPR reports with PC1CP 448kms away in JO33 square. My report was -24dB S/N with 2W to the halo and he was -17dB S/N with 5W. This distance is quite an odd one on 28MHz as it is too short for sporadic-E, so this was probably by tropo.

New German amateur test on 8.87kHz planned

Stefan DK7FC is hoping to do a second test transmission on March 15th on 8.97kHz using a vertical antenna, new large loading coil and variometer. Transmissions should start around 1400z. Several stations will be listening and the DF6NM 8.97kHz grabber will be active. Stations possibly within range are DF8ZR (16kms) and  DD7PC (53kms).

8.97kHz does look like the new frontier!

85 unique reports now on 500kHz with 1mW ERP

With a report yesterday from PA3EGO, the number of stations who've reported my signal on 500kHz WSPR and CW has now risen to 85 so far since last September. It's pleasing to see new DX reports coming in despite the less effective antenna now in place i.e. the 10m halo and its 5m of feeder coax. I'm actually finding the reports are not that much down, if anything, on the top spiral loaded vertical.

iPOD - 1940s style

This was posted on the QRP newsgroup today. Wonderful idea.
http://www.retrothing.com/2010/03/vacuum-tube-radio-hat.html

VKs coming through on 10m CW

VK6DXI was a good signal (579 at times) in the BERU contest this morning on 28.006MHz CW. I called several times with my 5W QRP but did not get through. Conditions on 10m are on the up!

8.97kHz VLF grabber on-line in Germany

DF6NM in Nuernberg, who has been successfully experimenting with sub-9kHz communications now has a temporary grabber on-air to capture any amateur signals on 8.97kHz.  See http://www.mydarc.de/df6nm/vlf/vlfgrabber.htm

500kHz CW QSO this evening

For a change I went on 500kHz CW and managed to get a 579 report from Chris G3XIZ. Chris then went on to work PA0WMR although the Dutch station was only about 559 with me. I called him but he did not hear me.