g0ftd's blog

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.*

Amazing. Only using 1 watts to a 4m piece of wire in the bedroom (indoors)!

Spots nearly 7000km away on such a poor set up.

73 de Andy G0FTD

I often hear a VK7 on 40m ssb in the mornings here in the UK.
Very strong.

So I'm gonna leave 40m running over night until about 0600Z and see what happens.

Also...encouraged by my 80m reports, I might try 160m over the weekend too.

- Andy -

I shall be testing a 2.5m square wire loop tonight.
It is indoors, fixed to the bedroom wall.
Obviously it's a very poor 80m antenna.
Only 5 watts will be used.

My internet connection will have to go to sleep, so I will
post logs tomorrow, and make a blog entry of stations received.

Unfortunatly I have big QRM on rx :-(

73 de Andy G0FTD



I currently use a 28Mhz quad loop which is taped to the spare bedroom wall indoors.

I had forgotten just how unbalanced the system can be whilst using an experimental tuner I had made for another purpose. Several years ago I made a balun for it, and it made a huge difference, both on tx and rx.

Having recently resurrected it's use for tx purposes my memory is coming back.

WSPR has only highlighted what I should have remembered.

I'll dig out my old tuner/balun config during the week, which will enable
me to use it as a mag loop for the LF bands too. Despite only being wire,it used to
work VERY well, and didn't melt with high power either ;-)


I left my WSPR beacon on for most of the day. All I got was one measley cloud of SpE, but very good signal strengths for a short time.

Having seen a fair few G stations monitoring, some just outside of ground wave
range, I was hoping to see some possible MS or aircraft scatter reception occur.

But nothing happened. However I will persevere,as these sort of tests are far

Locator square finally corrected.

Also I am currently using a wire loop antenna, and it's weird how
I'm being received in places that should be directly in the null of
the antenna.

73 de Andy