Thursday, 27 October 2016

#cqww Experimental realtime propagation PE4BAS

Just as experiment I want to make a chart and display the number of WSPR spots for some continents. Just to see what propagation is like on 20m just before the CQWW SSB contest. I tried to make a prediction for our contestlocation but it seems to be difficult if you don't know exactly how propagation will behave next days. This night there was a huge radio black out on the HF bands and so far my 1W signal on 20m has not been spotted anywere at nighttime! Surprisingly I spotted a station from Chile south america this night. Below a chart I will try to update through the day with new info. In 24 hours there will be a complete graph over de day on 20m. Spots are combined spots received and transmitted (1W).

Made with OnlineChartTool.Com

Above the propagation at Thursday 27-October-2016. Well the chart is complete now and I want to continue tommorow with a new one. I think it gives usefull info about when a certain part of the world can be heard and worked. Nothing seen from Asia, Japan or Australasia today. Hopefully propagation is rising a bit we'll have a look at it tomorrow.

Wednesday, 26 October 2016

#cqww SSB 2016 from a contestsite

Together with my XYL I decided it was time to try someting else for contesting. I knew local contest station PA6GR had a need of operators for the upcoming CQWW SSB contest so I will participate the contest together with this team. We decided to apply for the section multi operator, one radio, low power. Unfortunately we only have one good antenna, a large 3 element 20m monoband beam at 20m agl. So main band will be 20m. At night we will use a wire antenna fed with through a 1:9 UNUN for other bands, not the best but good enough to get some multipliers I hope. Now, we wish some nice propagation and nice DX!  My shift is from Saturdaymorning 5 UTC - 13 UTC and 22 UTC- 8 UTC Sundaymorning. I wish everyone a lot of fun and hope to work some of you readers!

Monday, 24 October 2016

Observing my own 30m WSPR TX results last week(s)

I dare to have my WSPR W5OLF 1W transmitter almost on 24/7 with 18 minute TX intervals (still continues). It might be a interesting thing to analyse who received me and when. But I haven't got the time for it. Hoping for some new ones in my WSPR log, so far only one (9A2WB Croatia). Still nothing from south and central America, could it be they are not allowed on 30m digital? However some interesting reports in the morning did catch my eye. Those are the reports from the USA around 8-9 UTC. Most of the time just one spot, sometimes a couple of spots. It seems it is a different from normal path but excisting almost every day according to my log. PH0NO Lars did point me at some propagation predictor called Droidprop which is a app that installs on my android phone. I actually already installed the app but never used it before. Anyway, I predicted 30m on a particulair day I saw K4COD spotted me (just as a example so I have a locator).

Normally 30m opens late in the evening. But you see that one spot again on 8:10 UTC. Now what does the prediction say. I thought to use both Droidprop as VOACAP although they say the same. See that peak at 8 UTC? But it just is below 10MHz although there is a small possebility it could rise a bit. I discussed it with several operators because I think it is much more likely that it these spots are made on longpath.

Look at the prediction. The MUF goes beyond 10MHz, actually there is much more chance for a long path signal to travel to the USA over the day. But I haven't got a directional antenna on 30m and can't prove it. I'm not a expert either. Interesting to think about it just as a experiment.

The 1W WSPR TX is normally powered from my solarpowered battery in the garage but since it is in my shack now I connected it to a new homemade device. It's a mini switched power supply with over/under voltage protection. It gives a 4 Amps max with 13V output. Especially made to power my FT-817 at vacation as a conventional power supply was too heavy and too big. I'm testing the durability before I will take it with me. The small TX does a great job on it at least. I still want to change some minor things on it. So a review of the internals and test will be given later on on this blog.