Blogs

I've generated a short video of using VOAAREA to predict received signal levels for my 200 mW WSPR transmissions. Comparing spots from the WSPR database to the predictions has been very interesting and show a pretty good correlation.

You can find a writeup of my results and a link to the video on my personal blog at:

WSPR & Propagation Predictions

Feedback appreciated!

In the quest for a simple WSPR homebrew transmitter, I had to step through the process of generating WSPR without a computer.

My on-the-air transmission of last night (2009-04-06) has proven that it is possible. Given that a WSPR beacon emits a cyclic time-invariant signal, its sound can be pre-recorded and re-played endlessly with a simple MP3 player.

The special activity day events are due to start again this coming Wednesday 8 April – see top left corner of the home page for future dates.

This has been a very popular event in the past, generating a high level of activity on bands that normally attract a lower amount of interest. The last 17m event on 29 October 2008 generated 7199 spots in 24 hrs which just goes to show that there is a surprising amount of propagation around even at this rather depressed stage of the SS cycle. The last 40m event on 12 November 2008 generated 37,866 spots in 24 hrs.

I am currently testing on 1.843130MHz with a 2 transistor transmitter and PIC modulator, QRSS signal with WSPR every 10 minutes. Power levels from 1mW to 750mW. ** The indicated Power Level will always show 50mW **

Looking at the Activity page on here I see I am listed as active together with G8JNJ. How does the site know that I thought as I have had no Spot reports or reported any. Of course, I am checking my own signal and WSPR is uploading, no magic involved at all.

Sorry Guys, My 7 MHz reports over the past 24hrs or so, are actually 10 MHz reports,
apologies...

73 - Franz

Greetings from EL86xv Florida
Info: on station here at NY4FD;
Radio: Icom 703 usually running 1 or 5 watts.
Computer: Compaq Notebook W98
Interface: Homebrew - Opto-isolator
#1 Antenna: Homebrew Vertical Dipole,22 feet end to end, mounted at ground level,
300 ohm Tuned feeder.
Homebrew Z match, VK5BR single coil
#2 Antenna: "Swapmeet $50 Dollar Special" Mag Loop MFJ 1788
coming on line shortly, as soon as I finish repairs.

Thank the project of K1JT we have now the possibility to test homebrewed antennas without direct help of other OM's. Made especeially with the zero-cost CAPANT_DL7AHW.

Thanks to Julian for his "Getting Started" guide http://www.g4ilo.com/wspr.html
With correct frequency and synchronized PC clock, WSPR gets decoded from the first try!

For me it was helpful to start the old good DigiPan additionaly to WSPR (basically, any waterfal display program would suit) to see those whistles around 10.140.200, starting every even minute and two minutes long.

My MEPT with WSPR is off air from 11.00GMT today. My current MEPT on the frequency uses a simple 'G' ident.

Since yesterday, there is an German Antarctic research station "Neumayer III" active in WSPR.

According qrz.com Felix, DL5XL is a member of the first wintering team on "Neumayer III" (70°41'S, 8°16'W, CQ Zone 38, ITU Zone 67, IOTA AN-016) and operate from the new station until early 2010 using his old call sign DP1POL.

If anybody interested on 10m, please contact me leaving a e-mail.
iz1fgu@sparks.it
I am resident in South Portugal grid IM57 5W or 1W into a full size loop.

Angelo CT1JTQ

If anybody interested on 10m, please contact me leaving a e-mail.
iz1fgu@sparks.it
I am resident in South Portugal grid IM57 5W or 1W into a full size loop.

Angelo CT1JTQ

I´m doing WSPR since some days and I was heard from different VK-Stations with my only 10 Watts and small GP-Antenna. I also heard VK-Stations on 40m, I never heard VK before. Very exiting! 73 de Stefan, DL4SEW

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