poniedziałek, 18 listopada 2019

IARU 2019 Results...

Well,

what to say...










After 13 years... first place :)

Best proof that if man says that he will do it, he will do it and there is no need to remind him every 6 months... :)))

Full article here:
https://contests.arrl.org/ContestResults/2019/IARU-HF-2019-FinalFullResults.pdf?fbclid=IwAR2GSU0ji1CRt1E_DopKU1hRTRwWrsMRdzDsaaHUnFgXWAfVr1HNbpkM3f4

Many thanks to: my wife (who had even helped me to build the antennas this year and supports me always and everywhere), Heinz HB9BPH for his help, HB9LU & SP3YEE Clubs for support, Wladyslaw SP8DXO and Peter SP8QEP for good advices and all others who always support me in these activities. Plus Herr Müller from Mettmenstetten for the field where I can setup all these strange masts and wires :)

See you next year :)

poniedziałek, 30 września 2019

New "tiny" item in my radio shack...

There is some news - a new tiny item in my radio shack.

Tiny may be not a proper word - the new item weights around 2.5..3 tons :))
In fact this is whole radio shack.

I became an owner of the old army car (29 years) that was used for carrying some radio equipment. The rear compartment is equipped with:

  • two pneumatic masts 
  • linear power amplifier Icom IC-PW1 (1kW)
  • racks where equipement can be installed
  • HF TRX Yaesu FT-890
  • VHF/UHF TRX Kenwood TS-790
additionally there are: power generator (24V, 400W for battery charging), two 100Ah batteries, compressor for pneumatic masts and some additional equipment.

So now starting rebuilding the interior according to my ideas. 












niedziela, 21 lipca 2019

National Mountain Day 2019


This was my first NMD contest. I have prepared all the equipment before carefully checking that is not exceeding the allowed weight. Surprisingly the biggest issue was to find so many 15 characters words - I downloaded thousands of English words from internet to discover, single words in English are never so long (only German is famous for it). Finally looked for famous people (writers, actors, painters) where the first and the last name are together long enough.

The weather forecast was very nice for that day so on the day of the contest my mountain welcomed me with …heavy rain. I survived, my antenna not. In the middle of the contest suddenly the propagation went down.. At least I thought so… But after removing the water from the antenna the “propagation” went back to normal…

Contest was fun, my cw skills are “in progress” and I really appreciate that everyone was sending the messages in speed comfortable for me. Many thanks for that, I do really appreciate. I promise next year will be faster 😊. And next year will have waterproof antenna too.

So, mni tnx es hpe cu agn next nmd, 73! de Marcin HB9EGA
















czwartek, 18 lipca 2019

IARU 2019!!



Some think that the year starts on the first of January and finishes at midnight at 31 December...

My year starts right after the IARU contest and ends with the next one.


As every year after a few months of preparations, new antennas considerations, endless discussions which antenna will be better for current propagation conditions I have approached (on Thursday before the contests) to my farmer land near Mettmenstetten (as always many thanks dear Mr Müller for my contest place).

The weather forecast was promising - no storms, not too much rain (forecasts...), no heat wave as week before (can't imagine building the antenna farm with 37 Celsius degrees).



The field was ready. This time there were even not too many "land mines" left for me by cows what used to be the case every year  :))



I started with the most complicated antenna - Spiderbeam. It usually takes most of the time - even with improvements that I have made for quicker setup it takes a lot of time. The 15 meters alu mast requires 3 levels of ropes. Pigs are bigger than for other fiberglass masts and need to be fixed with hammer.

To protect the coax against rain I used to cover it with isolation tape. This year I have printed (on the 3d printer) plastic tubes - one of them was glued to the balun box (outer) and the other one (inner) was inserted and secured in the outer one. This way the rain should not penetrate the plugs/coax without the horrible isolation tape.




At the end of the day I was able to lift the antenna to the height of 10 meters.


On the next day - Friday - I got some help from my wife - Ela. Together we were able to lift the mast additional 5 meters so the Spiderbeam landed on the final height - 15m.



The weather forecast proved that forecast is just forecast and nothing more...


Luckily the rains were just visiting me from time to time and finally the antenna farm was ready for the contest. I had the following antennas: spiderbeam (40, 20, 15, 10), inverted V (80, 40), GP (80,40), 5/8 (20), vertical delta (40), Windom (42m length for all bands)



On the contest day (Saturday) I came in the morning with all the equipment for the station. I remembered last year when when contest started my notebooks showed nice "blue screen" and I had to suddenly use the second one that I incidentally took with me. This year I had nearly everything doubled (radio, notebook, etc) but in the moment of starting of the contest everything was working fine.



Unfortunately not until end...  ;)

The contests started as usual with high traffic on higher bands (start at 14:00 local time when sun is high on the sky). The 15 and 10m bands were open and I was jumping 20-15-10... for the first hours.
I was especially interested in one of my new antennas - 5/8 for 20 meters. It was a new "toy in my garden" and was quite useful on 20m. Sometimes I was calling via this antenna and only if had no response I was switching to Spiderbeam and pointed it to desired direction. In the evening around 20:00 I noticed that the 5/8 is sometimes even better than the Spiderbeam even pointed into the corespondent direction. This was somehow strange - the best omnidirectional antenna should rather not outperform the 3 elements beam. Then I discovered that my Spiderbeam which should look like this:


actually looks like....


It was 20:00 (8pm), many stations on 20m, expected traffic to both Americas in next 2..3 hours and I have no basic antenna. Disaster.
I was considering continuing with the remaining antennas or try to repair this (whatever happened). Finally this is really best antenna I have for higher bands (and the only one for 15 and 10m) so I decided to put it down, try to repair and put it up again to maximum height I will be able to (remember full height required 2 persons).

When the antenna landed on the ground I discovered this:


The plastic element that I introduced for quicker assembly of the antenna had broken...
I did some workaround with a piece of rope.


Unfortunately the repair took around 2 hours so I was erecting the mast in the darkness. This also killed my Windom antenna because it was too dark to raise it.
But around 22:00 local time I was "back in business" and did some contacts with both Americas in the night hours.



On Sunday contest finished at 14:00. Heinz HB9BPH joined me to help in the station disassembling. Many thanks again Heinz!

Finally I have made around 280 contacts (310 last year) and got 80k points (last year 100k). Maybe these missing are just from the time when I was working on the antenna.

So now the new year started :) Need to fix the Spiderbeam and consider which antennas to use.

73!



niedziela, 30 czerwca 2019

5/8 20m antenna

For this year IARU Contest I decided to add to my antennas farm an omnidirectional antenna for 20m band. 20m still seems to be the most important band despite the generally bad propagation on higher frequencies. This band is considered as "best DX band" so many stations have good antenna systems here. The analysis of the last years contest show that most of QSO is done just here.



The choice is the 5/8 vertical antenna - has the lowest angle of radiation from all verticals and I already have 12m masts necessary for 20m antenna.

I found interesting website related to this kind of antenna: 5/8 Wave vertical antennas for HF

First I have destroyed some old power cable to get wires for the radials. Got 12 x 6m radials and equipped them with 3mm connectors. Recommended is more radials (at least 16) so maybe will find some new "old" power cable and make some additional ones.




Next I cut 12.5 meters of the wire for the main element. It was expected that will be too long (calculated value was 12,14m but finally was just perfect).

The 5/8 requires additional coil in the bottom. I used the variable coil from some old russian military radio.

Today early morning I visited my "antenna field". After erecting the mast I connected the VNA and measured the resonance frequency. According to description the resonance freq should be x/2.5 of the freq where the antenna is supposed to work. My resonance was at 5.7 MHz what gives 14.25 MHz final freq. Ok for contest, for CW operations will have to make it little bit longer.





Finally connected the coil and using variable slider fine tuned the desired 14,25. Connected to radio antenna works with SWR 1.3 in whole 14MHz band.







I listened for a while - probably my "DXes" were still sleeping because I could hear only the local stations (Germany, Italy, Malta, Poland).

Screen from RBN:





Not bad...

wtorek, 14 maja 2019

IARU 2019 - preparations

14.05.2019


As every year somewhere around mid of May I start preparations for this year IARU HF Championship Contest. I participate every year so more or less everything is ready however always trying to thing what went wrong last year and what could be improved.

The early list for this year is:
1. replace end fed antennas with something more efficient (they were worst from all my antennas)
2. maybe say "hello again" to vertical delta on 40m. somehow this antenna intrigues me. or maybe this time horizontal delta for 40m?
3. have full size dipole on 80m
4. have vertical for 40m - either separate or as additional element on vertical for 80m
5. review spiderbeam as many elements unglued from the pipes and needed to be fixed with tape.


26.05.2019


With the new FAA-450 Antenna Analyzer I have checked the coaxial cables I have. All the thick cables (RG-213, Aircell-7) show loss around 1db however the 50m of H155 shows around 4db! Seems not fantastic especially as I participate in the QRP what means that some percentage of the outgoing poor 5w goes into heat instead of being radiated by the antenna. This cable is much longer than needed so maybe I will split it into two 20 and 30m pieces. Or maybe just replace by some better coax. Anyway adding this into list of things "todo".


17.06.2019


Today decided to test my GP antenna - especially that required some improvements and I want to be sure that still works...













The results (15w) seem to be very good:








25.06.2019


So, probably have the final list of antennas for this year:

Higher bands - 20..10m

1. Spiderbeam
2. NEW 5/8 for 20m - may let me to hear some stations when Spiderbeam looks somewhere else

Lower bands - 160-40
1. GP for 80 & 40m on 18m mast
2. NEW dipole for 80m (must decide which direction)
3. NEW 2 x vertical deltas for 40m (crossed on 1 mast)
4. a 40m dipole as one element of the Spiderbeam

Still considering usage of the Windom antenna however the general rule is to use monobanders.

So will need 6 separate cables and 2 antenna switches.


29.06.2019


Farmer visited.
Field is available for me :)
Many thanks Herr Müller!!!

In the evening I have built 5/8 for 20m. First experiments tomorrow. Fingers crossed.

30.06.2019

Antena tested (see separate entry on the blog). Not bad :)


09.07.2019


4 days to contest...
Antennas ready - but the final list is here:
1. spiderbeam with 40m dipole
2. GP for 40 & 80m
3. Inverted V for 40 & 80m (on one balun)
4. Vertical delta for 40m
5. 5/8 for 20m
6. Windom (tuner from HB9BXE, antenna built)

Now charging the batteries, preparing cables, laptop, software, etc etc..