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Koos van den Hout

Welcome. This is my homepage where I write about my opinion, projects, things I note, things I try and other random stuff. Newsitems have tags for a bit of structure.

Latest news/thoughts/geeking/rants/notablog

2015-01-31 Received an image from ISS 8 hours ago
Image received from ISS SSTV callsign RS0ISS
Image received from ISS slow scan tv at location JO22NC 2015-01-31 starting 20:47
This chance of receiving images from ISS I took it and tried to recieve one. Not everything worked as planned: recording the audio while receiving the image with qsstv failed, someone tried to transmit on the downlink frequency to contact the ISS and the image is slanted which probably means I need to calibrate qsstv and/or the soundcard.

But, it worked! An image from the international space station!
Read the rest of Received an image from ISS

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2015-01-31 World news in my amateur radio contacts 14 hours ago
And sometimes world news gets into my amateur radio contacts, even when both sides don't really want that:
Pse QSL via LoTW,eQSLc .. please no bureau now. War here
This was in a contact with a radio amateur operator in the Donetsk region in Ukraine.

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2015-01-31 Interesting interference in the 10 meter amateur band 18 hours ago
waterfall plot of interference I had the radio and computer running checking for PSK31 signals at 28.120 MHz, the standard frequency for PSK31 in the 10 meter band. Suddenly I saw lots of carriers 5 Hz apart and very precise. I checked the websdr in twente and saw the same signal.

So I tried to make a screengrab of it and it went away. To show up at 27.120 MHz exactly the same and annoying some 27 MHz CB users.

I'm not sure what it was, my first guess was over the horizon radar which is 'famous' for interfering on HF amateur bands. Moving 1 MHz down when the HF propagation maximum frequency is dropping is also a sign of something like over the horizon radar.

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2015-01-27 Please use PGP when sending me e-mail 4 days ago
PGP lock logo I updated my PGP key and the page describing my use of PGP so it is easier to find the right key when e-mailing me feedback about any page on my site.

It is clear PGP is needed for any serious on-line private communications. Please use it as much as possible.

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2015-01-26 Upgrading a desktop system to Ubuntu 14.04 (for newer amateur radio software!) 5 days ago
Recently I found out I wanted the latest and greatest in some amateur radio software used on the desktop system thompson at home. So I upgraded ubuntu again. This system has run Ubuntu versions 8.04, 10.04 and 12.04, so it does show all those upgrades work!
Read the rest of Upgrading a desktop system to Ubuntu 14.04 (for newer amateur radio software!)

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2015-01-23 Amateur radio and geography 1 week ago
This evening when I had time to play with the radio the HF bands I can use were already going 'silent'. But I left the setup running om 14.070 MHz in fldigi in PSK31 mode. This is the recommended standard frequency for PSK31 in the 20 meter band, so a lot of people will try there first. I saw a CQ call from EA9BO and fldigi filled in the country as Ceuta & Melilla which I did not recognize.
Spanish autonomous cities Ceuta and Melilla
Map of Ceuta and Melilla, from Ceuta-melilla.png, Wikimedia Commons, Anarkangel
Which means one thing: a contact with a new country! I was able to answer his call after he had contacts with a few other stations and he got my signals and we had a short QSO. Afterwards I looked up Ceuta & Melilla which are the two autonomous Spanish cities that are within Morocco.

Again amateur radio learns me new things about geography! I already have looked up a number of interesting city names in eastern parts of Europe because of what I received as the cities of radio amateurs I had contacts with.

Oh and this is the first contact on the African continent.

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2015-01-21 (Interesting observations about the relationship between having time for radio and the chances of the...) 1 week ago
Google+Koos van den Hout : Interesting observations about the relationship between having time for radio and the chances of the bands being open...
2015-01-19 (First reports of QSO's with UT1FG/MM seen on twitter and on the Amsat mailing list. A rare opportunity...) 1 week ago
Google+Koos van den Hout : First reports of QSO's with UT1FG/MM seen on twitter and on the Amsat mailing list.
A rare opportunity to work otherwise impossible grids at sea!
2015-01-18 (When I started with amateur radio and read about contesting I thought that would not be interesting ...) 1 week ago
Google+Koos van den Hout : When I started with amateur radio and read about contesting I thought that would not be interesting for me.
But a perspective can change when you give it a try. I had a look in our club station when they were in the Sunday morning hours of the CQWW SSB contest last October and after some people convinced me to give it a try on 10 meters I spent the next hour or so with a headset and the logging program trying to get a few new calls in the log. And the previous weekend I tried some digimode operations and found out the UBA PSK63 prefix contest was going on. I checked my contest macros when I had time and made 10 QSOs and submitted the log. And this weekend the bands looked like http://idefix.net/~koos/newsitem.cgi/1421505951 and it made me consider working a bit on the setup at home so I can do voice on 20 meter (current 20 meter antenna is just right for digimodes but SWR gets too high on the voice part).
2015-01-17 Full amateur bands when a contest is going on 2 weeks ago
Websdr view with a contest active on 20m I like using the Wide-band WebSDR in JO32KF to check the actual conditions on the HF bands and to see if there are interesting voice contacts possible. Today I had a look at the 10 meter amateur band but it has no propagation at the moment. But the 20 meter band is doing fine and as visible in the waterfall display it is busy. A look at the HF contestkalender van PG7V op de Veron site (Dutch) confirms this: the HA-DX contest International Radioamateur Short Wave Contest organized by the Hungarian Radioamateur Society is active this weekend.

I decided not to participate on 20m voice: the SWR of my attic dipole gets to high in the voice part, triggering the SWR warning on my transciever.

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2015-01-13 (Just finished listening to this episode. I started having more time for podcasts recently, so I'm going...) 2 weeks ago
Google+Koos van den Hout : Just finished listening to this episode. I started having more time for podcasts recently, so I'm going to hear stuff less than 6 months old soon!
Anyway, enjoyed the episode. The repeated mentions of CQRLOG mean I really have to give it a try. Currently using fldigi but I'd like to keep track of which QSOs were confirmed through eqsl/hrdlog/paper qsl. And I'd like to do some more voice qso's, logging those in fldigi is a bit of a long way around.
2015-01-11 Playing in a radio contest 2 weeks ago
Yesterday I switched on the radio for a bit and when I responded to a PSK63 CQ I received a four-digit serial number. I assumed some contest was going on and responded with serial 1001 because some contests require 4 digit serials starting at 1001. After that I found out I was right, the UBA PSK63 Prefix Contest was going on. But we had other plans, so that was just one QSO.

Today I had some more time before 12:00 UTC to play with the radio, changed the contest macros a bit for this contest and tried making more contacts. In total I made 10 contacts so it's just a checklog for the others.

Contesting is more fun than I expected when I first heard about it. And contesting in digimodes has its interesting things. I made all contacts in the 10 meter band, this is becoming my favourite HF band at the moment.

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2015-01-10 Tracking GPS without sharing the track details with someone else 3 weeks ago
I wanted to track a ride I made on my recumbent bicycle, but without uploading the track details to some cloud service. The trackdata does include where I was at what time and that's not something I want to share.

Cycling visualisation 2015-01-09 The solution is available and simple: use a local GPS tracker which saves a GPX file. I found one for android: Open GPS Tracker which gives me a file in the end which I can process myself. This application can also display the track on a google map/openstreetmap/opencyclemap (when available).

The colour scale is the speed, you can see the influence of the heavy wind last Friday. Cycling on my recumbent on the dike of the Lek river is great.

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2015-01-09 (Always keeping an eye on pskreporter when I'm working in PSK31 or other digimodes) 3 weeks ago
Google+Koos van den Hout : Always keeping an eye on pskreporter when I'm working in PSK31 or other digimodes
2015-01-05 (More 'how do I convert to' choices from google #newreligions) 3 weeks ago
Google+Koos van den Hout : More 'how do I convert to' choices from google #newreligions
2015-01-05 A too cold harddisk 3 weeks ago
A problem I did not expect to see: a harddisk getting close to being too cold. Last month of harddisk temperatures This disk in the weather station computer in the shed is a laptop harddisk and according to the specs the minimum operating temperature is 5 degrees Celcius, which was reached last week when the shed dropped just below 2 degrees Celcius.

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2015-01-05 Leap second announcement 3 weeks ago
Promptly after fixing the previus leapsecond file I get the IERS Bulletin C number 49 today which states:
                                   UTC TIME STEP
                            on the 1st of July 2015


 A positive leap second will be introduced at the end of June 2015.
 The sequence of dates of the UTC second markers will be:

                          2015 June 30,     23h 59m 59s
                          2015 June 30,     23h 59m 60s
                          2015 July  1,      0h  0m  0s
And I notice the IETF seems to update the canonical leap-seconds file about two months after the decision is made by the IERS.

It's a good thing ntpd starts complaining when the file is about to expire.

Update 2015-01-06: An update was available from ftp://time.nist.gov/ but only when I connected over IPv6. An interesting form of IPv6 promotion. Notice the difference in messages between the old file and the new file loading:
Jan  5 13:54:33 ritchie ntpd[13710]: leapsecond file ('/etc/ntp/leap-seconds.3644438400'): good hash signature
Jan  5 13:54:33 ritchie ntpd[13710]: leapsecond file ('/etc/ntp/leap-seconds.3644438400'): loaded, expire=2015-06-28T00:00Z ofs=35 (no entries after build date)
Jan  6 10:14:17 ritchie ntpd[26348]: leapsecond file ('/etc/ntp/leap-seconds.3629404800'): good hash signature
Jan  6 10:14:17 ritchie ntpd[26348]: leapsecond file ('/etc/ntp/leap-seconds.3629404800'): loaded, expire=2015-12-28T00:00Z last=2015-07-01T00:00Z ofs=36

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2015-01-04 (Probably illegal in several countries: filming fireworks with a drone. But it gives an awesome result...) 3 weeks ago
Google+Koos van den Hout : Probably illegal in several countries: filming fireworks with a drone.
But it gives an awesome result!

Found via https://mancave.conrad.nl/vuurwerk-quadrocopter-indrukwekkende-beelden/ (Dutch)
2015-01-02 (The mechanical portion of my 3d printed rotator for the arrow antenna is nearly complete!) 4 weeks ago
Google+Koos van den Hout : Seen in the Amateur radio community, but also interesting here!
2015-01-02 (Happy new year. Now where’s my flying car?) 4 weeks ago
Google+Koos van den Hout : Roads? Were we are going, we don't need roads. A good 2015, and drive safely while we wait for those flying cars.

News archive by year: 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015

The person

Father, cat owned/owner, Unix/Linux fan, Internet user, reader, recumbent byciclist, snowboarder, ipv6 fan. For those who don't speak Dutch: how to pronounce Koos van den Hout.

The job

Specialist information security at Utrecht University with a modern Profile page.
 

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Koos van den Hout, reachable as koos+website@idefix.net. PGP encrypted e-mail preferred.

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Meningen zijn die van mezelf, wat ik schrijf is beschermd door auteursrecht. Sommige publicaties bevatten een expliciete vermelding dat ze ongevraagd gedeeld mogen worden.
My opinions are my own, what I write is protected by copyrights. Some publications contain an explicit license statement which allows sharing without asking permission.
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