Blogs

Yesterday i developed a very simple web app that searches my local WSPR database and returns all 2WAY WSPR spot pairs that i had...

¿What i call a "2WAY WSPR spot pair"?
A pair of "inverse" spots whose timestamps do not differ more than 10 minutes in the same band. "Inverse" menan that callsign and reporter are switched in those spots.

Nothing really new, but for the newcomers to 80,160m and below bands, I've posted a few new plots, result of last night experiments on 80m. It is on my Picasa web-album.
You may start here:
http://picasaweb.google.fr/f6irf2/RadioStuff?authkey=Gv1sRgCPXUsqym6Jzbl...
And move forward using the album arrows.
It shows what kind of improvement can be expected from a simple magn-loop versus a vertical in a noisy environment (if you are lucky enough to have a very quiet location "man-made noise-free", it may not be that effective - A magn-loop is only effective to nul-out a local noise source arriving at low angle).

It is not the first time I am doing such a tests, using a Magn-loop and/or a K9AY. More tests can be seen by following the links at the bottom of the last album picture.
A good start on "low-band receiving" specific problems, and comparison of RX-ant perf. can be found at
http://www.w8ji.com/receiving.htm
http://www.k7tjr.com/rx1comparison.htm

I have just been taking my first steps with the software, as usual without reading the instructions. It's suprising how far you can get on instinct!
Managed to log VK2UD on 40 metres twice between 2100 NZST and 2200 NZST, but due to incorrect set up have lost the record and didn't upload. Better next time he comes up I hope.
Transmitting can wait until I have gor the receiving correct.

Hi all,
Finally I got my Softrock 6.2 (80m/40m) running for WSPR. I am using ROCKY feeding the VAC (Virtual Cable) feeding WSPR. I tried Winrad, but I have massive stability problems with it. One of the first stations received with the Softrock was VK6BN. Great stuff. Any others here using the Softrock ???
73 de Christoph DF9CY

I will be on a sailing trip from Sept. 5th to Sept. 12th cruising the northern Adriatic. My latest WSPR beacon will be active all week on 80m to 10m with 1W into a piece of wire. As WSPR does not support pre- or suffixes to the call sign, the beacon will be operated as OE1IFM. Most of the time the correct call will be IK3/OE1IFM. For short periodes OE1IFM/MM will be appropriate when we cross from Italy to Croatia. There 9A/OE1IFM will be the correct call. I will try to announce the actual correct call on the WSPR homepage.

2009-09-02 17:52 ZS6Y 10.140216 -22 0 KG33wv +40 10.000 KL1X BP51 16075
Welcome to Johannesburg South Africa
73's
Etienne
ZS6Y
KG33wv

my rig

tx/rx icom 746. power 5 wats
antenna vertical home made. and ant,2, g5rv, home made
my age 56 years .
my sec, hobby are sport fishing carp/ and pike.

info qrz.com. and link to pictures radio hobby
greetings martin.

I have set up my DDS MEPT with WSPR Ident on 50.294395MHz and it is running on test ready for tomorrows 6m activity day.
Despite running just 100mW this MEPT has been copied at C.150Km in the past. It will be interesting to see how it does with the added activity.
Note:- as it runs continuously and with several modes it is just outside (at the bottom) the WSPR slot.

Noticing some WSPR activity on 504 Khz band and having 0 experience of bands
below 1.8Mhz I just tuned-in to see. Just using my untuned vertical and
despite my very noisy location I received the SM6BHZ beacon immediately.
Reminded me when I first heard W5UN on 2m EME (just using 4x9 home-made yagis
made from Al recovered from the bin...)... magic !

Knowing the improvement brought by the RX-loop on 160m, I decided to try
quickly something to see if the 160m loop could be tuned down to 504kHz.
http://f6irf.blogspot.com/2008/05/multi-turns-magnetic-loop-for-top-band...
A quick calculation, indicated that I needed around 1nF capa to get the loop
to resonnate at 504. in fact 1nF was not enough, the final value was found by
experimentation (just using the band-noise to find the resonnant freq) to be
around 1390pF (2x470pF + 2x220pF silver mica caps + a small 40pF adjustable
cap), which means that my 6 turns loop has an inductance of approx 72uH (and
not 100 as first estimated !). At this frequency, the bandwidth is extremely
limited, just approx +/- 1.5kHz at -3dB.

I then discovered, that the IC756pro2, did not have sufficient sensitivity to

Is active beacon IQ4DJ (RADIO CLUB ARI CARPI) to 137 kHz 24 H no stop

Signal to WSPR 137,500 Khz (USB dial 136,000)
Signal to QRSS10 137.760Khz
signal to QRSS3 137.700Khz

40W power on 50 Ohm
Vertical antenna 12m + 20 m horizontal
0.6 A current in antenna

Are welcome spot.

For the radio club I4BBO Valentino

Electronic Translation

Many of you may wonder what the huge amount of data available in the WSPR-DB may be used for...
Just for the newcomers, I am spotting here again some work I have done using the WSPR-data.
http://mangafight.free.fr/index_eng.htm (just updated)
You may find ideas for you own work. Please spot any propagation, antenna or other related study you may have done using WSPR.

Thanks and best regards - Patrick

My AVG anti-virus has started reporting that Dimension4 is infected with SHeur2.AZMQ Trojan Horse.

The following notice appears on the Thinking Man Software website:

AVG Antivirus recently updated their software to search for the SHeur2.AZMQ Trojan Horse. This recent AVG Antivirus update INCORRECTLY identifies Dimension 4 as being infected with this new Trojan Horse.

In close cooperation between the DAGOE Foundation, Mercy Ships and 5 Dutch radio amateurs, a new DX-pedition is on its way.

If everything goes according to plan the team foresees a visit to Benin from October 7th until October 30th.

The team expects to be on air from October 10th-27th and will also participate in the CQWW SSB 2009.

I am in contact with the DX-pedition and they will take one of my beacons to Benin.
So if it works out TY1MS will be active in WSPR!

In earlier days while being new to operating it was fully satisfactory
to make the contact, log it, and move to the next one. Only much later
it became more interesting to search for what is behind it, what sort of
conditions, and to quantify signals or levels as a reality check for
the used technology. For some years I have advocated that a single
antenna is not enough on any band if one wants to optimize the use
of all possible propagation conditions. Actually, even two antennas

Hi All !

Here a picture of my 80cm long MICROVERT Antenna 73m AGL.
Thats my 30m Antenna I use since I started WSPR.
The black line points to my MICROVERT.

peter dl6nl

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