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Playing with WSPRlite


#1

Dear all,
I’m opening this new thread to share with you my experiments and findings with the great WSPRlite I’ve got for my 2017 SOTA Sherpa award.
After a bit of struggling with laptops, I finally managed to communicate with the WSPRlite unit and program it today, so I started testing it with a preliminary transmission on the 20m band with just 200mW output to my random wire endfed antenna in the balcony.
This is what I got from a bit more than 2 hours beacon transmission.
The times on the table are UTC.
Except for one spot from Norway, all the other spots come from North America.
It’s clear that the location, the orientation of the balcony and the antenna set up work great towards North America.


Best 73,

Guru


#2

Hello Guru

Congrats for your Sherpa award;
Tks for WSPR report

73 and HNY
Alain F6ENO


#3

I had left home leaving the WSPRlite connected last evening but once back home, I found that the WSPRlite had stopped transmitting, probably due to a power shortage. Very likely due to excessive consumption when my wife and daughters probably connected everything (oven, kitchen, lights, toaster, microwave, washing machine…) all at the same time, as they often do, despite all my advises and warnings. So the last spot was at 18h04 UTC.

On my return home at about 23h UTC, I put he WSPRlite back on transmission for the whole night and these are the collected spots this morning at 9h40 UTC.

Interestingly I only got a single spot from Italy at 23h14 UTC and nothing else for the whole night until 6h46 UTC, when I got spotted from Bulgaria and then, from that time onwards, several other spots from different locations to the East (Bulgaria, Ukraine, Austria, Hungary, Romania) and the North (Sweden, Denmarc, Scotland) and also in Africa (Canary Is,). As the time passed by, the spots from the East disappeared and turned into spots from Germany and Holland.
The unexpected spot is one from W5 at 9h14 UTC, whose QTH locator is located in the Mexican gulf coast:

These are all the spots I got in this new time window:





In this map, as well as all the spots from tonight and the early morning, we can also see all the North American spots gathered yesterday before the power shut down.

I find these results very interesting and I share them here with you in the hope that so you’ll find it too.

Best 73,

Guru


#4

Hi,
Let me show you the spots raised in the same time frame of 2 consecutive days using 2 different antennas in 2 locations 18Km appart.

Spots on 13/01/2018 with random wire endfed in balcony 25m above street level:
QTH Locator IN92ET.


Spots on 14/01/2018 with yagi TH-5DX 15m above ground level beaming NorthWest:
QTH Locator IN92CQ.




#5

Hi all,
I left the WSPRlite working while connected to my TH5 DX yagi beaming NorthWest in my house at the village SouthWest of Pamplona and I have got hundreds of spots which have produced this very interesting graph showing the times at which the band remains closed:

Best 73,

Guru


#6

The following graph shows the spots received after the WSPRlite worked with the 2 following antennas in different locations:

  • Up to about 19h utc of January 15th with Hy-Gain TH5-DX yagi 15m a.g.l. in QTH IN92CQ. At that point I stopped the WSPRlite.
  • From about 22h utc of Jan 15th to the end of transmissions at about 13h15 utc of Jan 16th with my random wire endfed in the balcony up abt 25m a.g.l. in QTH IN92ET.
    The pattern of night propagation conditions total closure remains the same for the 20m band.

Conditions open at about 8h utc and close at about 22h30.

This can be a useful information to be bore in mind by overseas activators when planning their activity on 20m band looking for DX into EA.

Best 73,

Guru


#7

My WSPRlite will run on 30m tonight with the 14m long endfed wire in the balcony up 25m above the street level.
It started TX some minutes ago and this is what I can see so far on http://wsprnet.org/ :slight_smile:

We’ll see what we get tomorrow.
73,

Guru


#8

In my previous post 2 days ago, I told you I had left my WSPRlite connected to my antenna in the balcony, but upon my return home the following day for lunch at 13h utc, I found out that an unexpected event had occurred in the form of XYL accidentaly unplugging the WSPRlite power supply from the mains at about 9h utc.

So I took the WSPRlite with me and I would take it after work to my house in the village South West of Pamplona to leave it transmitting on 30m band to one of the 2 suitable antennas I have there. I would decide right there which one.

An 80m dipole works perfectly on 30m, as 3,5MHz x 3 = 10.5MHz, which is very close to where we are allowed to transmit on 30m band.

I yesterday left my WSPRlite running in the house connected to what I believed it was my 80m band inverted vee bazooka dipole and I returned to the rental appartment in Pamplona, but then I realized of a new unexpected event. I had made a mistake and I had wrongly left the WSPRlite connected to my 40m band bazooka dipole instead of the 80m band one.

Fortunately there wasn’t any risk of damage for the WSPRlite unit because I had previously adjusted my MFJ-986 tuner for perfect 1:1 SWR.

I had already left the house, so the WSPRlite kept running with the 40m band bazooka dipole and this is the graph plotted with the TOP DX spots raised:

I have returned to my house in the village late in the evening today and I finally left the WSPRlite unit working with the 80m band bazooka dipole connected.

The apex is about 14m above the ground and the ends about 5m above the ground.

After the first few minutes transmitting, the difference can already be seen:

I think it will be very interesting to compare the graph with the wrong 40m band dipole and the one I’ll get tomorrow, unexpected events permitting :wink:

73,

Guru


#9

This is the graph of the WSPRlite transmitting 200mW on my 80m band inverted vee bazooka dipole. It certainly looks different to that of the previous day with the tuned for 1:1 SWR but still wrong antenna (for 40m).

I left it again working on 30m this evening with a different antenna. This time with a Barker & Williamson BWD-90 inverted vee broadband folded dipole. The apex is again about 14m above the ground and the ends about 5m above the ground.
The predominant direction of both the 80m band bazooka and the BWD-90 antennas is North-South, while that of the 40m band bazooka dipole wrongly used yesterday is East-West.

Best 73,

Guru


#10

Following you can see the graph with the BWD-90 folded dipole on the 30m band.

Notice that there has been a null from around 2 AM to 4 AM with this antenna.

About the same null can be seen when transmitted with the inverted vee bazooka for 40m, from about 3h15 to 4h30 AM.

On the graph with the inverted vee bazooka for 80m, there’s not a null at night.

73,

Guru