News archive April 2015 - Koos van den Hout

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2015-04-30 DAB services scan 30 April 2015 5 years ago
Volgens Radio en TV zenders Nederland zijn de regionale DAB+ multiplexen gestart op 6B Oost/Noord Nederland, 7A Zuid Nederland, 9D Noordwest Nederland en 9D Zuidwest Nederland. De multiplex op 8A Zuid-Holland, westelijk deel Utrecht en zuidelijk deel Noord-Holland zal starten per 1 september.

Ik was natuurlijk benieuwd of Oost/Noord Nederland het tot bij mij in Utrecht zou halen dus ik heb een volle scan gedaan met de Pure One Mini radio. Die kreeg ik niet, maar wel 7A Zuid Nederland met een zwak maar werkend signaal, met als eerste service die ik zag L1 Radio, de regionale omroep voor Limburg. Daarnaast ook Omroep Brabant, Omroep Gelderland en Puur NL die nog stilte geeft. Maar dus nog geen Radio M Utrecht via DAB+ hier.

De Noxon DAB USB stick had weer wat meer moeite met ontvangen en kreeg deze multiplex niet mee. Dus in de verwerkte scanlijst nog niet zichtbaar.
Read the rest of DAB services scan 30 April 2015

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2015-04-27 Upgrading the homeserver to Ubuntu 12.04 5 years ago
And to get to a version of Ubuntu with support available I kept doing and did 'do-release-upgrade' again today on the homeserver greenblatt.

Again the upgrade was running for a while. A big improvement is that the process now uses screen so I was able to attach to that running console from other sessions and answer questions.

After the upgrade the reboot came, and after the reboot I noticed resolving was broken. This was traced back to the ppp0 interface for the connection to the outside world and the internal interface for services having started completely without IPv6 support. Doing an ifdown and ifup helped, but this should all start correct automatically.

I noticed the new Postgresql 9.1 is already installed, but Postgresql 8.4 is the default version available over port 5432, so I can do the pg_upgradecluster when I have time for that.

Later I noticed some packages were held back. I traced this back to /etc/apt/preferences still being optimized for Ubuntu 8.04 hardy and hardy-backports. I emptied the preferences file and it all sorted itself out and now everything is up to date.

This was probably the reason Postgresql 8.4 was left installed and active. After the updates above apt-get autoremove was going to delete Postgresql 8.4.
Read the rest of Upgrading the homeserver to Ubuntu 12.04

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2015-04-26 Upgrading the homeserver to Ubuntu 10.04 5 years ago
This weekend was about the last weekend that I could have access to Ubuntu 10.04 LTS for upgrading my homeserver greenblatt from Ubuntu 8.04 to Ubuntu 10.04 which will run out of support this month, making it unavailable as an upgrade path. I postponed this for way too long because I expected a lot of work fixing things, especially asterisk which runs our home phone system.

The solution to asterisk was simple: I disabled it and reprogrammed a Gigaset C450IP base to deal with our VoIP provider directly. After all the upgrading is done I'll go fix things with the OpenVox ISDN card in a test machine and when all is stable again I will move things to production.

For the rest it was a matter of typing 'do-release-upgrade' and hope for the best. Reconfiguring packages took the longest and the biggest issue was that the upgrade from Postgres 8.3 to Postgres 8.4 wasn't done automatically but I had to do this myself using the hints from How tu [sic] upgrade Postgresql 8.3 database file to 8.4 - stackoverflow.

The documentation says to do this beforehand but Postgresql 8.4 isn't available before the upgrade and it took a bit of fiddling to have Postgresql 8.3 available after the upgrade. But then pg_upgradecluster ran. It complained about a few tables and the end result I noticed was that those tables were dropped out of the upgrade completely. I re-enabled Postgresql 8.3 and migrated those databases or tables using pg_dump. Not a complete smooth upgrade but I think it went ok.

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2015-04-26 Tried APRS on my way back from Apeldoorn 5 years ago
After I visited the Interessedag Amateursatellieten 2015 in Apeldoorn I decided to give APRS a try again.
aprs data 2015-04-25 PD4KH-7 data from aprs.fi
All received APRS data from PD4KH-7 on the way back from Apeldoorn
I tried APRS over a year ago and it works with APRSdroid on my tablet and the vox function of my radio.

On my drive back I wanted to try this again. Outside antenna on the window of the car, radio and tablet in a bag so the vox would work. I heard the familiair buzzsaw noises from the bag from time to time during the drive but the end result is one whole position report seen on the APRS network.

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2015-04-19 () 5 years ago
Google+Koos van den Hout : At least here in the Netherlands there is a difference whether the button was pushed or not.
But a different rant is detection loops that will make the button light up making me think I don't have to push the button and after a number of seconds the button light goes out again.
2015-04-14 (De ontwikkeling is niet nieuw maar het is goed om het zo leesbaar te zien) 5 years ago
Google+Koos van den Hout : De ontwikkeling is niet nieuw maar het is goed om het zo leesbaar te zien
2015-04-14 (The last pass sunday 21:15 utc with just partial decodes.) 5 years ago
Google+Koos van den Hout : The last pass sunday 21:15 utc with just partial decodes.
2015-04-13 Partially decoded images from the last ISS pass with SSTV active over my location 5 years ago
RS0ISS image 11 (part) RS0ISS image 11 (part) RS0ISS image (part)

From the last pass of the ISS with SSTV active over my location some partial decodes, this is where qsstv has some problems. That's why the above are posted screengrabs, qsstv decided not to want to save the partial images.

This pass started at 21:15 UTC, slowscan TV was scheduled to end at 21:30 UTC.

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2015-04-13 (You don't know Flack is one of the podcasts I follow. This episode is about something that's part of...) 5 years ago
Google+Koos van den Hout : You don't know Flack is one of the podcasts I follow. This episode is about something that's part of life in the US midwest: tornadoes.
I am interested in the weather and I watched Twister and the Storm Chasers. This is the other side: being in the area or being in that house where the tornado can strike next.
My compliments to Rob "Flack" O'Hara.
#podcast #tornadoes
2015-04-12 (Parade for Yuri Gagarin. From the 19:39 pass at my location. Number 8 of the series. The pass started...) 5 years ago
Google+Koos van den Hout : Parade for Yuri Gagarin.
From the 19:39 pass at my location. Number 8 of the series. The pass started with a different image running but I haven't tickled qsstv into decoding that yet.
2015-04-12 (From the pass 16:27 utc here. Partial decode, but I tickled qsstv into saving it. I also heard voices...) 5 years ago
Google+Koos van den Hout : From the pass 16:27 utc here. Partial decode, but I tickled qsstv into saving it. I also heard voices, probably Russian on the downlink.
2015-04-12 Partial decode of an image from RS0ISS 5 years ago
RS0ISS decoded image commemorative diploma From the pass over my location (16:27 UTC) I decoded this partial image. I also heard speaking what sounded like Russian, with for me clear "Romeo Sierra .. India Sierra Sierra" so I guess there is one lucky russian radio amateur with a confirmed contact with RS0ISS.

Recording added to this post. I am looking for a transcription and translation.
Listen to audio attachment:
MP3 media: Part of ISS pass at JO22NC, voice traffic 2015-04-12-1627 by PD4KH (rightclick, select save-as to download)

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2015-04-12 Parade for Yuri Gagarin 5 years ago
Parade for Yuri Gagarin, in memory of Yuri Gagarin, image 8 of the RS0ISS series This evening pass (19:39 UTC) had a less good timing for me, but almost a full image decode. On the start of the pass a previous image was running but I can't make qsstv pick that up.

Image 8 of the RS0ISS series.

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2015-04-12 ("Man Enters Space", in memory of Yuri Gagarin Image 2 of the RS0ISS series. Received at locator JO22NC...) 5 years ago
Google+Koos van den Hout : "Man Enters Space", in memory of Yuri Gagarin

Image 2 of the RS0ISS series. Received at locator JO22NC, pass starting 11 april 2015 20:33 UTC.
.. and I'll have to explain our neighbours that wasn't a car alarm somewhere but just an image from space.

Equipment: video tripod, Arrow dual band antenna (but only 2 meter connected to the radio), FT-857 radio with gpredict doing the tuning and showing me where to point the antenna. Recording the audio with audacity and decoding the images from the recording with qsstv.

Normally I set up gpredict to ignore any passes below 15⁰ elevation, signal from most amateur satellites will be too weak. RS0ISS is high-power so I have to set the minimum elevation to 5⁰.
2015-04-11 Man Enters Space, in memory of Yuri Gagarin 5 years ago
Man Enters Space, in memory of Yuri Gagarin, image 2 of the RS0ISS series Another chance this weekend for receiving images from the russians aboard the International Space Station (callsign RS0ISS). I had luck again with this pass and one image came through near-perfect.

Image 2 of the RS0ISS series.

Equipment: video tripod, Arrow dual-band antenna with just the 2 meter antenna connected to the radio, FT-857 radio. Laptop controlling the radio with gpredict and recording the audio with audacity. Decoding the recorded audio with qsstv.

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2015-04-11 (Italian engineering at its finest) 5 years ago
Google+Koos van den Hout : Italian engineering at its finest
2015-04-10 No I gave up on ftp years ago 5 years ago
I am used to seeing ftp scans (single packet) or real connect attempts (three packets) in the firewall logs from time to time. But this is new, the last few days there have been repeated connection attempts (3 packets for each source port) from several different IPv4 addresses.
Apr  9 09:45:07 greenblatt kernel: [9368095.406323] FW reject: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=54188 DF PROTO=TCP SPT=42284 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0
Apr  9 09:45:07 greenblatt kernel: [9368095.406636] FW reject: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=54189 DF PROTO=TCP SPT=42285 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0
Apr  9 09:45:08 greenblatt kernel: [9368095.600015] FW reject: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=54206 DF PROTO=TCP SPT=42284 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0
Apr  9 09:45:08 greenblatt kernel: [9368095.600329] FW reject: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=54207 DF PROTO=TCP SPT=42285 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0
Apr  9 09:45:08 greenblatt kernel: [9368095.800311] FW reject: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=54209 DF PROTO=TCP SPT=42284 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0
Apr  9 09:45:08 greenblatt kernel: [9368095.834389] FW reject: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=54216 DF PROTO=TCP SPT=42298 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0

Apr  9 15:19:31 greenblatt kernel: [9376229.358588] FW dropped: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=21161 DF PROTO=TCP SPT=13089 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0
Apr  9 15:19:34 greenblatt kernel: [9376230.559851] FW dropped: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=21180 DF PROTO=TCP SPT=13089 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0
Apr  9 15:19:40 greenblatt kernel: [9376232.980904] FW dropped: IN=ppp0 OUT= MAC= SRC=46.119.76.40 DST=xx.xx.xx.xx LEN=48 TOS=0x00 PREC=0x00 TTL=111 ID=21224 DF PROTO=TCP SPT=13089 DPT=21 WINDOW=64380 RES=0x00 SYN URGP=0

Apr 10 08:21:04 greenblatt kernel: [9402534.350429] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=9124 DF PROTO=TCP SPT=10002 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0
Apr 10 08:21:04 greenblatt kernel: [9402534.653582] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=9273 DF PROTO=TCP SPT=10002 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0
Apr 10 08:21:05 greenblatt kernel: [9402535.002381] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=9320 DF PROTO=TCP SPT=10002 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0
Apr 10 08:22:25 greenblatt kernel: [9402566.855279] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=12941 DF PROTO=TCP SPT=10436 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0
Apr 10 08:24:00 greenblatt kernel: [9402604.705345] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=16545 DF PROTO=TCP SPT=10882 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0
Apr 10 08:25:45 greenblatt kernel: [9402646.825970] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=21008 DF PROTO=TCP SPT=11378 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0

Apr 10 09:35:50 greenblatt kernel: [9404337.065473] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=1738 DF PROTO=TCP SPT=11259 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0
Apr 10 09:35:51 greenblatt kernel: [9404337.387287] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=1859 DF PROTO=TCP SPT=11262 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0
Apr 10 09:35:52 greenblatt kernel: [9404337.748446] FW reject: IN=ppp0 OUT= MAC= SRC=117.204.35.104 DST=xx.xx.xx.xx LEN=52 TOS=0x00 PREC=0x00 TTL=112 ID=1964 DF PROTO=TCP SPT=11267 DPT=21 WINDOW=65535 RES=0x00 SYN URGP=0
All firewalled safely, there is no ftp service configured.

A new attack?

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2015-04-08 Audio in websdr without java 5 years ago
I noticed some of the websdr online receivers were only offering html5 audio and html5 waterfall display. The waterfall display started working ok in recent firefox for linux but the audio always remained silent. Until I checked and checked again and the solution seemed to be 'check audio settings'. And I found the 'AudioCallbackDriver' from application 'CubebUtils' with a firefox icon in pavucontrol (PulseAudio volume control) which was set to output level 0 (silence). Changing that to a more reasonable volume helped a lot!

Now I don't need java applets in my browser to use the different websdr servers.

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2015-04-04 Amateur radio away from buildings 5 years ago
I had this Friday al to myself and decided to try some amateur radio out in the field using the new longwire antenna I recently bought.

I was pondering taking the recumbent bicycle first but the outside temperature in the morning of 5 ⁰C made me chose the car which would give me a warmer shelter to sit in. I drove to a nearby outside recreation area (De Leyen near Groenekan) and there I was shielded from the wind so I could sit outside. I decided to set up the radio on a park bench near a tree.

During the setup someone did ask me what I was doing and I explained about amateur radio. That person asked whether that wasn't normally done from a room in the attic and I explained that being away from radio noise source would be an interesting experiment. This explanation seemed to answer that person's interest.

I used some nylon rope to hang one end of my longwire antenna up in a tree and anchor the other end at the base of another tree. A filled plastic water bottle makes a nice smooth weight to throw a rope over a high branch of a tree. The antenna was sloped downwards in southern direction.
Read the rest of Amateur radio away from buildings

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2015-04-01 New country for me in amateur radio: Afghanistan 5 years ago
Spotting T6T on pskreporter I saw T6T active on 10 meter PSK31 this afternoon, fading in and out. And quite popular with other stations, Afghanistan is a rare country to see active on amateur radio. But one go he saw my reply and we managed to have a short contact. Right after the contact he faded away completely again!

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

PGP key 5BA9 368B E6F3 34E4 local copy PGP key 5BA9 368B E6F3 34E4 via keyservers pgp key statistics for 0x5BA9368BE6F334E4 Koos van den Hout
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