Svensk manual WSJT-X 1.8.0-RC2


Lagom till releasen av WSJT-X 1.8.0-RC2 kunde jag färdigställa den svenska översättningen av användarmanualen för programmet. Denna finns nu tillgänglig för nerladdning på WSJT:s hemsida.

En direktlänk till manualen hittar du här.

Notera att manualen är inte komplett då denna tillhör en RC version. Den bygger på det arbete som hittills har utförts i den engelska manualen fram till RC2-utgåvan varför det kan fattas information alternativt finnas felaktig sådan.

För er som använder manualen är jag väldigt tacksam för kommentarer och förslag till förändringar då målet är att göra användarmanualen så bra som möjligt!

73 de SM7VRZ




Svensk manual, WSJT-X 1.8..


Svenska användarmanualen, WSJT-X 1.8

Arbetet med användarmanualen för WSJT-X 1.8 går framåt och jag har nu översatt och korrigerat majoriteten av materialet. Nu kvarstår införande av ev. ändringar och lite finputsande på meningar, stavfel och annat som upptäcks efterhand. Min tanke från början var att denna skall släppas ungefär samtidigt som den skarpa versionen av WSJT-X 1.8.

Dock finns det kanske ett behov av att släppa det tidigare då RC1 versionen har fått stor spridning. Därför är min intention att så snart som möjligt släppa ett utkast till användarmanualen så att de som idag använder RC-versionen har ett stöd i en Svensk version av användarmanualen. När och om detta sker kommer att meddelas här på min blogg.


73 de SM7VRZ

SOP-activity 2017, results are in..

It’s a new month and with that the end of the SOP-activity for this year. The results are in and it seems like I’ve managed to get enough points to for the award this year aswell! From an activity point of view I’ve didn’t manage to get that many stations worked as hoped and only digimode but there will be more chances  to do better next year! 🙂

The complete log will be available soon on Clublog and for thoose interested to see wich stations that was worked.

Some quick statistics for this years activation: 🙂

Top three worked continents:

Quantity Continent
226 Europe
6 Asia
5 North America

Top three longest distance:

# Call Mode Band Distance
1 W0OGH FT8 20m 8814km
2 JR3IIR FT8 20m 8489km
3 JA4FKX JT9 30m 8397km

Top three shortest distance:

# Call Mode Band Distance
1 SM7IUN FT8 40m 111km
2 SP1BBV JT65 20m 287km
3 DF9OX FT8 17m 361km

Rarest QSO:

Call Mode Band Distance
SO1WS FT8 10m 3872km

Number of worked SOP-qualified countries:

Quantity Country
44 Germany
19 Russia
14 Finland
10 Poland
8 Sweden
4 Norway
2 Lithuania
2 Latvia
1 Estonia
1 Denmark
1 Kaliningrad

Already looking forward to the next activation and hopefully a lot more stations in the log! 🙂

73 de SM7VRZ

New release candidate for WSJT-X

The development team behind WSJT-X announced the new release candidate for WSJT-X version 1.8.0 (WSJT-X 1.8.0 rc1) for about two weeks ago. Since then, more and more users are “upgrading” to the new RC-version exploring the new exciting functions that have been developed.


The greatest attention has undoubtedly been the new mode FT8, Franke Taylor 8-FSK modulation. Since the release the number of stations working FT8 has been growing immensely on the bands. The supporting software, JTAlert by VK3AMA, have also been updated to support the new mode.

The new mode have been developed by K1JT and K9AN and uses 15sec TX/RX-sequences. Compared to JT65/9:s 60sec this means it´s about 4 times faster. Because of this, the modes puts the operators timing skills to the test and requires a much more quicker operating style than JT65/9. But don’t worry, the software has a built in auto-sequencing function that will help you with the fast maneuvers required. The message structure is similar to the other JT-modes and the normal JT65 user will find it familiar right away.

The list below summarizes more details on the FT8-mode (according to release note):

  • 15 sec T/R-sequence length.
  • 75 bit messages length + 12 bit CRC.
  • LDPC FEC-code.
  • 8-FSK modulation with 6.25 Hz tone spacing.
  • Constant-envelope waveform.
  • 50 Hz bandwidth.
  • 7×7 Costas array synchronization at start, middle and end.
  • 12.64 sec transmission duration.
  • -20dB decoding threshold. With the forthcoming “AP” decoding some extra dB:s will be possible.
  • Multi decoder to decode signals i passband, just as in JT65. Multipass decoder possibility is under development.
  • Auto sequencing (optional) as well as optional auto reply function when sending CQ.

More functions are being developed and as usual the input from the users is an important factor for enhancing the operating experience. Hopefully there will be an second release candidate some time soon so more exciting functions will be available.

If you would like to download the release candidate, click here and choose the correct package for you platform.

Regarding the user guide, the work with translating it to Swedish is under way. However a release date for the user guide is not available for the moment.

73 de SM7VRZ

SJ7SOP 2017 Activation


The first of July is coming closer and the preparations for the 2017 activation is under way. Antennas are checked, the rigs are prepared but sadly the shack computer conveniently crashed during the preparations. 😦  However my laptop will fill in as a replacement for the time being. 🙂

The activation plan this year is to cover as much bands possible with as many modes as possible. Please have a look at the SJ7SOP page here on the blog or the SJ7SOP page for more information. I normally do prefer digital modes but this year I will try to make an effort to work more SSB.

Maybe I`ll be seeing you on the bands? 🙂



SJ7SOP lives on!

As I blogged in November last year, it seemed like the 2017 SOP-activity would be the last with the SJ7SOP callsign due to new regulations from the Swedish telecom authorities, PTS.

The Swedish Amature Radio society, SSA, has been delegated the exercise of authority over certain amature radio related questions for a number of years (along with military organisations). During the end of 2016 the delegation expired why the PTS sent out a new proposal for delegation to the SSA which contained a number of changes in the management of callsigns. To make a long story short, the new proposal hindered the SSA from issuing and prolonging any callsign i the SJ-prefix series which meant that the call would be invalid after July 2017. The prefix series was to be reserved for future use by the PTS. This limitation in the new delegation, together with other matters was addressed by the SSA to the authorities and a negotiation was made.

Last week, the SSA announced that they had accepted the delegation which now had been modified in certain areas, among others the management of callsigns. To my joy the already registered callsigns in the SJ-series was accepted to remain and now also able to be prolonged. No new callsigns in this series is to be given out why the SJ7SOP call is now a rare call!  😀

So, this means that the annual SOP-activation with the SJ7SOP call is secured for at least a number of years ahead! 🙂

73 de SM7VRZ

80M Antenna experiments..

As the prognosis for the higher bands looks quite sad now when the eleven year cycle is heading for a low, I decided last summer to try to build an antenna for the 80M band and eventually also 160M. These bands have not been that much activated in my home QTH yet and why not get more active? 🙂

As a general rule, I prefer to have dipole antennas, mainly to keep a balance in my antenna system but with a rather small garden and the fact that a dipole for 80M is rather long I had to leave my principles and look for alternative solutions, balanced or not.

I started my experiment in July with trying to fit a full length dipole, in some way, in the backyard. Since I knew from the beginning it wouldn’t be an easy task as the whole garden itself is far from enough space to put it up in a conventional way, I started to look at alternative ways to get it up. My final solution, far from the most effective one, was to elevate the feedpoint of the dipole and leaving one leg a about 3m above ground and the other straight vertical down to ground level, using the leg more as a counterpoise. A half dipole so to speak. 🙂 The result, well I did get it to resonate but the effectiveness is probably not that good and radiation diagram should be more or less high angles. I managed to work some European stations with the antenna in the SOP-activity and after that as well. The coverage seemed to be mainly Europe and no DX-stations either heard or worked so i guessed the antenna could use more elevation.

The only way to elevate the antenna about 1/4 wavelength at my QTH is to use the house to mount the center of a full length dipole in a Inverted-V configuration. The backside is that only one leg of the antenna would be able to go the full stretch without needing a “bend”. The conclusion was to look for other alternatives.

I wanted to reduce the length of the antenna itself to make it possible to fit, both in the garden and possibly mounted on the house. I stumbled upon an antenna construction consisting of a 80m dipole made shorter with inductances which made the total length only about 17m. I decided to give it try!

The antenna is made up of four segments of FK1,5mm2 wire and two 30uH coils, spooled with the same type of wire. The antenna is feed through a 1:1 balun, which I disregarded for the time being. The segment are two 3000mm and two 5600mm wires connected as shown below. The final length of the outer wires was not consistent with the drawing as it depends on where in the 80m band you will tune it to as well on other factors.


80m shorted dipole

The coils are made of the same wire as used for the antenna segments. For my part using 40mm diameter pipes, it took about 55 turns to achieve the correct values. The inductances was winded up on the PVC-pipes and, with the help of my Rigexpert AA30, carefully adjusted to about 30uH. I also had a small home brew center isolator with a fitted 50ohm cable which was used for the antenna. The build itself took about 8h, including the purchase of 40mm PVC-pipes on the local hardware store. To get the wires I needed I used parts of an old 3×1,5mm2 cable I have laying around looking for suitable project. After the build, it was ready to be tested.


One of the antennas coils

I erected the antenna in a inverted-V position using my 5m fishing rod in the garden and measured the antenna. The end wires needed some extensions since the antenna was to short. A quick fix with some spare wire and the soldering iron solved the problem extending the antenna about 1m on each end. Since it is a shorted antenna, the bandwidth is no more than 20-30 kHz why it not suitable for use in the complete 80m band. I focused mainly on tuning the antenna to the lower segment of the band, aiming for 3576 kHz primarily (JT65/JT9). After some tuning in the rain and +2C (cold day) I was satisfied with the result and went in to the warm shack to do some on the air testing. After a few hours I decided to mount it more properly and moved the antenna to the back garden, removing the fishing rod. It is now mounted about 3m above ground as a conventional dipole with one end from the house and the other end in a tree, just at the edge of the garden.


The 80m shorted dipole in the garden

When moving the antenna, the tuning made earlier of course changed why it need some more fine tuning, however the change was acceptable and I left it as it was. Further testing during the evening showed that, although mounted quite low, it still seemed to have a more favourable radiation diagram than my first experimental antenna. I actually got more heard stations outside Europe than ever before. Even a few VK-stations (VK6 and VK5) was decoded with acceptable levels. Since it’s now colder outside, I´ll leave the antenna as it is for more evaluation. Iplan to look for a mounting point on the roof of the house when the weather gets a bit warmer. 🙂


The home brew center insulator and feeding point.


The 80m short dipole viewed from the side with the coils to the left and right.

73 de SM7VRZ