ON3JT

VLF transmission of SAQ on 12:00 UTC on July 3th 2011

Joost — Sun, 03 Jul 2011 16:59:33 +0000

The second transmission today of the Grimeton base VLF transmitter SAQ was done with my normal HF transceiver. With the help of the Datong VLF converter and the home made ZS6BKW antenna the missiob was easy accomplished. Okay the converter was a bit overloaded with the ZS6BKW antenna, but I managed to receive them good. [...]

SAQ transmission of 9:00 UTC on July 3, 2011

Joost — Sun, 03 Jul 2011 09:31:02 +0000

Just received the full tranmission of the Swedish VLF transmitter SAQ on 17,2 kHz. The setup this time was my home computer with a soundcard. The antenna was a ZS6BKW connected to the soundcard. A software receiver was used : Speclab from DL4YHF and the audio was transferred with a Virtual Audio cable to FLdigi. I [...]

RTTY sound in movies

Joost — Fri, 24 Jun 2011 18:00:01 +0000

When watching a documentary today I noticed that the makers used the very known rtty sound when they are talking over wireless communication. I remember that in the James Bond films of the 60′s and probably the 70′s also they use the same sound. I guess it is a 75 or 100 baud rtty sound. [...]

The bandplan on 40m

Joost — Sat, 23 Apr 2011 08:38:52 +0000

This morning I saw T77NC in PSK31 on my screen. Dial frequency 7.035. I like to try to work him. Gathering all details like, name, location, qth locator and so on from his qso’s with others I suddenly heard a very strong cw signal just 400 Hz away. And very strong, so bye bye T77NC. A bit upset and [...]

And there will be snow

Joost — Fri, 17 Dec 2010 12:04:33 +0000

Lot’s of snow this morning. And I have a day off, lucky me Let the pictures speak for themselves : Nice…

A new receiver for me : SDR Ensemble RX II

Joost — Wed, 15 Dec 2010 20:06:29 +0000

Having built two monoband SDR kits, it was time for something new. The Softrock Lite II receiver kits are working fine, but I wanted something that covers more. The two monoband kits are made for 30m and 40m.With my soundcard that samples at 96 kHz I can see/hear the whole 30m band, on 40m however I [...]

My personal best dx using wspr

Joost — Sun, 12 Dec 2010 18:43:47 +0000

My top 5 of my best dx using wspr. On 20m the antenna is a half wave vertical. On 80/40 and 30m I used the Diamond W735 with an extra dipole for 30m. This antenna hangs just 2 meter above the lawn. 20 m : Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km [...]

Upgraded my blog

Joost — Sat, 11 Dec 2010 21:00:08 +0000

Finally upgraded my blog. Despite my presumption I did the upgrade with the automatic option of WordPress itself. And it failed miserably….. I had no blog anymore and a 500 server error when I tried to access the admin pages. Uploaded some of the old files in an attempt to regain control. No progress.. Cleaned [...]

I’ve been hacked by Ghost61

Joost — Sun, 28 Mar 2010 09:22:58 +0000

Received yesterday an email from the hosting company : Dear Customer, This afternoon we discovered some hacked customer sites. Since then we have been looking for the reason of the issue and are logging all affected sites. We expect to restore all original sites around 22h. We continue to investigate the cause and we will [...]

My 20m end fed or half wave vertical antenna

Joost — Tue, 23 Mar 2010 09:00:54 +0000

In a previous post I wrote that building a half wave antenna for 20m is on my todo list. The reason for this that my groundplane needs counterpoises or radials. For the half wave or end fed this is not needed. That is what people usually say. A few days ago I started building one. For the [...]