g0ftd's blog

As noted over in the WSPRNET forums, loading the map display has been
throwing up occasional errors, usually moaning about Javascript.

There is also talk that Google are trying to promote a charging
scheme for access to the map.

Just curious as to why wsprnet needs to access Google maps at all ?

Surely a generic world map jpg could be used ?

73 de Andy

Most spots come from europe, the USA and VK/ZL.

Not much from the "millions" of African countries, or the biggest land mass called Russia.

Or even the electronics capitals of the world, Japan and China.

What up with the rest of the world ??

73 de Andy

I've just been reading the latest IARU R1 Newsletter.

It is available here -


Downloads it and it says that (about 80% through the document) that there is a recommendation
to "remove all dedicated WSPR spot frequencies and footnotes from the VHF managers handbook".

Have these guys at the IARU got a serious mental problem ?

Hmmm, I'm seeing multiple decodes from SM0EPX/RX2.
Not just from me, but everyone else too.
Typically reporting everyone 3 times for the same transmission.

73 de Andy

I see this now, Chaos Tools AJAX Demo down the side of the main page ;-)

73 de Andy

I've noticed for some time now that DC4LC is continually mis-reporting the
bands of his spots.

My 10Mhz TX is being reported as being on 7Mhz and 14Mhz.

Obviously these false spots are going to be happening to everyone he received on 10Mhz !

I don't have his contact details, but of DC4LC is reading this, can you please correct
your equipment.

Thank you.

73 de Andy

I've been playing with WSPR for about 4 years now.

I've kinda taken it for granted really, and I admit I don't even know who runs it or the work involved.

I suppose because it works so well I have taken it for granted.

But it's time to say thanks to all involved - thanks for being here, and provide one of amateur radio's most
unique slant on the hobby (in my opinion).

(I say one, because my hat goes off to the QRSS grabber chaps who provide another unique slant in the world of QRPp).

72/3 de Andy G0FTD

Just a gentle reminder folks...

Please check the accuracy of your WSPR transmissions, I still see quite a few out of the WSPR
sub band, especially on 10Mhz.

These cause QRM to the QRSS sub band which is IMMEDIATELY below the WSPR sub band.

I think that ALL users of these modern ultra narrow band modes really should think about investing in some
decent measuring equipment before being let loose on the air.

Try properly monitoring YOUR own signals, and you might be surprised !

Just recently we seem to have a plague of stations who transmit on
each two minute interval, especially here in europe.

Whilst I **fully understand** if anyone is testing out the drift
characteristics of their rigs by using 2 minute frames for a few days,
I cannot understand the stupidity of doing so for weeks on end, or months !

What if a local station to theses people wanted to do some listening
on the same frequency.

Such stupidity is nothing more than selfish to their fellow amateurs.

I wish they would grow up.


As I understand it the 30m WSPR subband ends at 10,140,100
although I know that the WSPR software includes a little bit
of overlap by default.

Unfortunately QRSS activity tends to start below 10,140,100Mhz
and there seems to be a few users using WSPR below the accepted sub band.

It may be a TX error and users not aware of it, but it would be nice
if WSPR'ers could bear in mind the QRSS activity below 10,140,100 please.

Kind regards,


Had a few spots from VK2DDI this morning on 30m.

To the best of my ability looking at computer models, the closest propagation
match would say that it was long path.

Anyone else agree/disagree ?

Either way, I'm just happy to have ben spotted with my 500mw and an indoor wire ;-)

73 de Andy

I've been looking at my 10Mhz WSPR observations.

Seems to me that:

The ionosphere become useable one hit by the suns rays at local civil sunrise.

Civil sunrise being defined when the sun is at +6 degrees from the observer site, as opposed
to astronomical or locally defined sunrise which has a massive 2 hour difference in defination !

Does anyone know of any tx setup tools ?

I have a TX kit here which generates the tones, but trying to setup the desired FSK shift
and seeing if the data is being sent correctly is very difficult.

At the end of the day, attempting to see if homebrew equipment is sending the right tomes
relies upon making a transmission and relying upon the WSPR software to see if a decode has been

Very long and tedious !

Well today I thought I'd try as a test.

On 10.1Mhz -

a) 1.5m homebrew "Miracle Whip" standalone indoors
b) A 25ft wire "picture rail" antenna.

As expected, the "picture rail" antenna got a lot more spots.

But the curious thing was that when I took a few callsigns that had been present
over the complete test period and looked at the average S/N ratio of each antenna
with them, the average gain was only 4db !

I'm puzzled by this, as this was not what I would expect.

Ok I'll try to explain.

If I have a self contained homebrew WSPR transmitter for others to check
propagation with - how do others even know it exists, especially if it's on a band
that often shows zero users (60m/10m/6m/4m/2m/70cms are good occasional examples.)

Using the proper WSPR software enables WSPRNET to report the activity in the band listings.
Others see callsigns listed and are therefore *tempted to give it a go.*