Category Archives: Amateur Radio

iPhone and LHS

Recently I’ve started using the iPod functionality on my iPhone.  I don’t know why I never figured it out before, but it plays the audio out throught my Car’s stereo over the bluetooth connection.  I’ve been using this newly-found functionality to catch up on Linux in the HAM Shack, which I also only discovered recently.

I have to say, I do like the format Russ and Richard have adopted, and though I’ve been in the hobby for a good few years, and using Linux even longer, I’m both enjoying it and learning from it. If your a HAM, and looking for an alternative to Windows head on over to the  website and check it out.

Cheers Guys.

Sean Kelly Tour – a different view

And this is it…

SeanKellyTourSnapshop.jpg

What has this got to do with the Sean Kelly Tour? well, the Sean Kelly Tour took place last Sunday (August 30th), and from all accounts it was quite successful with roughly 2700 hardy cyclists taking to the roads.

The above screenshot (covering an area of roughly 900 square kilometers) is taken from the xastir window of my home Ubuntu desktop after I got home from the event. It shows the trails left from the APRS equipment in several vehicles (including some of these, these, one of these and one of these), several objects and a few home stations. As the screenshot is from the end of the day, it is quite confused looking.

AREN was at the event to assist Civil Defence in maintaining an accurate location of as many of the three different sub-events (50k, 100k and 160k) as we could, allowing them to more cleverly deploy their own medical resources around the course. Great use was made of the SEARG APRS digi-peater network, and it definitely (as can be almost seen) proved it’s usefulness on the day, allowing the guys in Net Control Tim, EI2KA and Bernard, EI8FDB (see below) to keep both the the Civil Defence and event organisers updated as to the locations of various items almost in real time, throughout the day.

P1030384

It was a good days exercise for AREN, and best of all I wasn’t manning Net Control!

CASTOR and POLLUX

Castor and Pollux
I really love this image of Castor and Pollux shortly after being deployed from STS-127.

Both ANDE-2 satellites were successfully launched from STS-127 at 17:23utc July 30th over Texas, USA. Below, in the Youtube movie from OZ9AEC, the deployment starts at 05:13:

I don’t have a particularly effective satellite receive set-up (no steerable aerials, just an omnidirectional vertical aerial) for attempting to monitor these, but now and again, I’m able to receive a telemetry packet. Here is one from today:

1k2: fm POLLUX-1 to CQ via TELEM ctl UI pid=F0(Text) len 100 12:55:47
0000 MEMS 1017126 24.06 23.112 21.09 -1.02 -0.03 0.558 -8.31 -2.63 5.
0040 30 25.54 26.81 26.17 2.60 1 14 52 ..

For some reason, I find it pretty cool to receive something other than TV from a satellite in space, maybe it’s the fact that they have a finite lifetime, who knows, but I still like the picture!

My Favourite “Ham Activity”

While travelling recently, I came across the make magazine. The edition I picked up, had some great technology projects in there covering a mixture of eco-friendly ideas, along with advice for the sustainable garden along with other more practical advice. They also have a blog where they post a mixture of “cool” and useful ideas/projects. Earlier this month, they featured a post by a young Fashion Designer from New York City named Diana. Funnily enough, it wasn’t about fashion. It was about her favourite activity in Amateur Radio, which is “Catching satellites on ham radio“.

Several things surprised me about the post. Diana is, well, a girl, and fashion designer at that. Why is that surprising? The hobby is heavily biased towards (middle aged, overweight) men. The antenna in the picture is homebrew, i.e. it looks like she made it herself (I particularly like the orange tips on the antenna elements).

Even “within” the hobby, a lot of folks don’t bother homebrewing anything, they just hand over hard earned cash. I’m guilty of this myself as much as anyone. (Though in my defence, my current HF antenna’s are a mixture of wire, fishing poles and pull-ties).

Lastly, I don’t know of a) any fashion designers, b) girls, c) girl who homebrew, in the hobby. I think it’s great! Welcome to the hobby Diana, and I hope to work you on the bands at some stage.

Twittering using Morse Code.

Yes, you read it right.

A massive project to bounce voices from Earth to the moon and back to another spot on Earth will be launched June 26. Several former astronauts and other famous people have signed on, and so can one lucky Wired Science reader.

We’ve secured a spot for one Tweet to be bounced off the moon, so send your most space-worthy 140 characters to @wiredscience or e-mail betsy_mason@wired.com. The winner can go to a moon bounce station to personally send the message to the moon.

Read the full article here. Thanks Jeff for spotting it. No doubt about it, it is a big (literally) project, and the article does a very good job at explaining it

paclink-unix

I posted before about using the Airmail through Wine on Linux to access the Winlink system. It’s fine, it works, but it is a lot of overhead. Recently, in a response to a question, Dana, KA1WPM posted to one of the Winlink email lists that I’m on about the existence of paclink-unix. Paclink-unix was started by Nick Castellano, N2QZ.

Now I had seen this mentioned before, but for whatever reason I never took the time to look at it. This time I took a closer look.

After downloading the source and having a quick browse, a few small modifications had to be made.

In mime2wl.c I changed Nick’s call-sign to my own. The same had to be done in mail.wl2k.c

in wl2k.c I changed

asprintf(&command, "%s -ba %s", SENDMAIL, emailaddress)

to

asprintf(&command, "%s -bm %s", SENDMAIL, emailaddress)

I’m not sure what -ba means to the original sendmail, but -bm for postfix, which I’m using, seemed to be what I was looking for, after consulting the manpage.

Next the configuration. After (very) briefly consulting the postfix docs. I came up with the following:


/etc/postfix/main.cf
....
transport_maps = hash:/etc/postfix/transport
...

/etc/postfix/master.cf

wl2k unix – n n – – pipe
flags=RXhu user=j0n argv=/usr/local/libexec/mail.wl2k
….

I mostly copied the maildrop line already in the configuration file. removing the ‘D’ in the flags and adding an ‘X’. I’ve not yet tested whether I need the ‘D’ or not.

X indicates ” Indicate that the external command performs final delivery. This flag affects the status reported in “success” DSN (delivery status notification) messages, and changes it from “relayed” into “delivered”.”


/etc/postfix/transport
...
winlink.org wl2k:localhost
...

So anything destined @winlink.org now gets sent through the local transport.

That’s pretty much it for the moment.

If I need to send to any other domains through winlink I could add the following “catch-all” to the transports file.

* wl2k:localhost

And everything would go through it.

Testing it then I sent myself an email at winlink.org, and tried to collect it using the supplied tools.

j0n@ns1:~/src/paclink-unix-0.3$ sudo wl2kax25 EI7IG "EI8IG-10 v EI2WRC-4" 1200 60 ei7ig@localhost
Connected.
---
<

<

<

<[WL2K-2.0.0.18-B2FIHM$]
wl2kax25: sid [WL2K-2.0.0.18-B2FIHM$] inboundsidcodes -B2FIHM$

>; EI8IG-10 V EI2WRC-4 DE EI7IG QTC 0
>[PaclinkUNIX-1.0-B2FIHM$]
>FF

wl2kax25: proposal code C type E mid 6L9CAL8YBRST usize 274 csize 236 next (nil) path (null) ubuf (nil) cbuf (nil)
79
wl2kax25: sentcksum=79 proposalcksum=79
wl2kax25: 1 proposal received
>FS Y
wl2kax25: title: Testing Postfix
wl2kax25: offset: 0
wl2kax25: STX
wl2kax25: len 236
wl2kax25: EOT
wl2kax25: extracting…
wl2kax25: calling sendmail for delivery
wl2kax25: delivery completed
wl2kax25: Finished!
>FF

j0n@ns1:~/src/paclink-unix-0.3$

wl2kax25 is like fetchmail. It connects out over a linux ax25 port (i.e. Radio) to a winlink node and retrieves it to be delivered to an email account of your choosing. In the above example, the winlink node is approximately 35km away, but not accessible directly. Consequently I used the EI2WRC-4 digital repeater (digipeater) to relay my packets.

For a ‘pre-alpha’ piece of software, it is working nicely for me, and it is good to have a Linux “Native” winlink client. Many thanks to Nick and Dana for their efforts.

Engineered – A week of wonder!

“During the week of the 9th to 13th of February over 18,000 students took part in a range of interactive engineering related activities in 20 counties across Ireland. The activities ranged from the following:.. more

I was asked if I could co-ordinate with Waterford IT the running/scheduling of the event on behalf of the Irish Radio Transmitters Society. The IRTS had developed a Morse Code Oscillator Kit, along with a presentation to be given beforehand. As it turned out, I ended up doing the presentation myself, along with assistance from a colleague.

We entertained students from Waterpark College on the first day and students from the Ursuline Convent the second (some pics here). I say entertained, as all the students were quite sceptical at the beginning of the class. But seemed prepared to give the kit a chance after watching the Jay Leno Clip (below).

At the end of the first day, only one group from Waterpark hadn’t got their oscillator going, the second day, there were a two or three kits that weren’t fully functional by the time they had to leave.  That said they all seemed to have a go at it, glad of the distraction from normal classes.  Some even had a go at sending Morse Code to one another.

I was reliably informed last week that at least one student out of the two classes intends to have a go at the Radio Experimenter exam, so I guess we can chalk that down as a ‘success’, and as good experience.

Ham Radio – A contact sport?

I just love that title from Pat Rundell’s weblog (N0HR) so I couldn’t resist using it.

I was asked the other day, how ‘competitiveness’ gets measured, how can there be ‘contests’ on Amateur Radio. It is a good question which I will try and explain a bit better with an example. Below is my log (in Cabrillo format) in the IRTS 80 Meter Counties Contest from the first of January 2009, which I recently received back from Thos, EI2JD, the IRTS contest manager.

The purpose of the contest is to “work” i.e. speak to as many stations in as many Irish counties as possible in the three hour time window between 14:00 and 17:00UTC on the date of the contest. A contact is only considered valid if both operators exchange correctly their callsign, a signal strength report (in contests its always given ‘5’ by ‘9’ no matter what it really is), a serial number, and a county. Scoring is relatively straightforward. For any county in the 32 counties, the contact is worth 4 points, for any contact outside of the 32 counties, the contact is worth 1 point. Then, this total is multiplied by the number of different counties contacted. Make sense?, Right so, lets look at my log.

CLAIMED-SCORE: 2860
CLUB:
CONTEST: IRTS80M
CREATED-BY: YFKtest 0.0.9
NAME:
ADDRESS:                                   41 qso
ADDRESS:                                    8 oei  =    8
ADDRESS:                                   33  ei  =  132
ADDRESS:                                   20  co  =  140 x 20 =   2800
OPERATORS: EI7IG
SOAPBOX:
QSO:  3500 PH 2009-01-01 1540 EI7IG         59     1 WATERFORD EI3JB         59   049 WAT   4
QSO:  3500 PH 2009-01-01 1542 EI7IG         59     2 WATERFORD EI7GAB        59   051 DON   4
QSO:  3500 PH 2009-01-01 1544 EI7IG         59     3 WATERFORD GM3PAI        59   062       0  GM3POI
QSO:  3500 PH 2009-01-01 1545 EI7IG         59     4 WATERFORD EI7CD         59   071 DUB   4
QSO:  3500 PH 2009-01-01 1548 EI7IG         59     5 WATERFORD EI2GLB        59   081 KLD   4
QSO:  3500 PH 2009-01-01 1551 EI7IG         59     6 WATERFORD EI4GYB        59   125 CAR   4
QSO:  3500 PH 2009-01-01 1551 EI7IG         59     7 WATERFORD EI3JE         59   129 COR   4
QSO:  3500 PH 2009-01-01 1552 EI7IG         59     8 WATERFORD EI8BEB        59   073 SLI   4
QSO:  3500 PH 2009-01-01 1553 EI7IG         59     9 WATERFORD EI4GXB        59   086 CLA   4
QSO:  3500 PH 2009-01-01 1554 EI7IG         59    10 WATERFORD EI6GEB        59   125 LAO   4
QSO:  3500 PH 2009-01-01 1555 EI7IG         59    11 WATERFORD EI6JK         59   112 ROS   4
QSO:  3500 PH 2009-01-01 1556 EI7IG         59    12 WATERFORD EI3ENB        59   036 KLK   4
QSO:  3500 PH 2009-01-01 1558 EI7IG         59    13 WATERFORD EI9DZ         59   038 LEI   4
QSO:  3500 PH 2009-01-01 1600 EI7IG         59    14 WATERFORD EI5GTB        59   062 DON   4
QSO:  3500 PH 2009-01-01 1601 EI7IG         59    15 WATERFORD EI9FBB        59   093 COR   4
QSO:  3500 PH 2009-01-01 1604 EI7IG         59    16 WATERFORD EI6DL         59   045 WES   4
QSO:  3500 PH 2009-01-01 1606 EI7IG         59    17 WATERFORD EI2V          59   080 DUB   4
QSO:  3500 PH 2009-01-01 1607 EI7IG         59    18 WATERFORD EI8CE         59   115 WAT   4
QSO:  3500 PH 2009-01-01 1608 EI7IG         59    19 WATERFORD EI9HX         59   117 ROS   4
QSO:  3500 PH 2009-01-01 1610 EI7IG         59    20 WATERFORD EI4CF         59   088 GAL   4
QSO:  3500 PH 2009-01-01 1611 EI7IG         59    21 WATERFORD EI9JU         59   070 DON   4
QSO:  3500 PH 2009-01-01 1612 EI7IG         59    22 WATERFORD EI5GPB        59   070 COR   4
QSO:  3500 PH 2009-01-01 1613 EI7IG         59    23 WATERFORD EI8JA         59   061 WAT   4
QSO:  3500 PH 2009-01-01 1614 EI7IG         59    24 WATERFORD M0MCX         59   080       1
QSO:  3500 PH 2009-01-01 1620 EI7IG         59    25 WATERFORD EI3GRB        59   084 CLA   4
QSO:  3500 PH 2009-01-01 1621 EI7IG         59    26 WATERFORD GI8SKN        59   097 ANT   4
QSO:  3500 PH 2009-01-01 1622 EI7IG         59    27 WATERFORD EI8IU         59   087 LEI   4
QSO:  3500 PH 2009-01-01 1624 EI7IG         59    28 WATERFORD EI2CA         59   132 MEA   4
QSO:  3500 PH 2009-01-01 1625 EI7IG         59    29 WATERFORD M0DDT         59   058       1
QSO:  3500 PH 2009-01-01 1639 EI7IG         59    30 WATERFORD EI7GY         59   087 DUB   4
QSO:  3500 PH 2009-01-01 1644 EI7IG         59    31 WATERFORD G3WGQ         59   025       1
QSO:  3500 PH 2009-01-01 1645 EI7IG         59    32 WATERFORD MI0CLP/P      59   078 ARM   4
QSO:  3500 PH 2009-01-01 1645 EI7IG         59    33 WATERFORD G3LAS         59   037       1
QSO:  3500 PH 2009-01-01 1646 EI7IG         59    34 WATERFORD G4TPH         59   004       1
QSO:  3500 PH 2009-01-01 1646 EI7IG         59    35 WATERFORD G0MUR         59   011       1
QSO:  3500 PH 2009-01-01 1647 EI7IG         59    36 WATERFORD G3RXQ         59   031       1
QSO:  3500 PH 2009-01-01 1648 EI7IG         59    37 WATERFORD MI3CQX        59   021 DOW   4
QSO:  3500 PH 2009-01-01 1648 EI7IG         59    38 WATERFORD EI9FVB        59   114 COR   4
QSO:  3500 PH 2009-01-01 1649 EI7IG         59    39 WATERFORD MU0FAL        59   037       1
QSO:  3500 PH 2009-01-01 1651 EI7IG         59    40 WATERFORD EI5IH         59   046 CAV   4
QSO:  3500 PH 2009-01-01 1654 EI7IG         59    41 WATERFORD EI1DG         59   045 DUB   4
QSO:  3500 PH 2009-01-01 1657 EI7IG         59    42 WATERFORD EI7MRE        59   093 MAY   4
END-OF-LOG

The first thing you’ll notice is that my claimed score (2860) is higher than the score Thos gave me (2800). I obviously made an error in my calculations, but also notice that I make a mistake in the third QSO. I must no have heard the other station correctly and entered their call-sign incorrectly. Also if you look at the time of my first log entry, you’ll notice that I didn’t actually start until 15:40, the contest was nearly half over by then (I was elsewhere and had to rush back for the contest).

Now, how would I got about improving my score i.e. make my station more competitive? Well there’s a few things I could do. First, getting on air for the entire duration of the contest would be a great help. Next, given as I’m fairly restricted at home in the size of an antenna that I can put up, I’ll probably have to ‘go portable’ for the next contest. Somewhere along the copper coast most likely, which would give me a very good ‘ground’ for an antenna that will allow me to hear and work stations around Ireland much easier. This would then hopefully lead to me hearing more counties, which would increase my number of multipliers (mult count), and thus increase my score. Based on what I heard on air on the day, I’m expecting to see the winning score to be somewhere over 12,000 maybe even higher (150-160 contacts, 31 counties).

Now, to competitiveness. I guess it would go along the lines of beating my own score first, then to try to beat the score of everyone else in the local club/county/province/country. The first one should be easy, the rest, well we’ll just have to see what happens on the Sunday the 21st of June.

73, and see you on the band!

de John, EI7IG

The first sea rescue by radio

Today, it’s taken for granted that if you are at sea, and in distress you can summon assistance by doing one of the following:

  • press and hold the red button on your DSC equipped VHF Radio (if within range of land)
  • if your VHF radio isn’t DSC equipped, you can call on VHF Channel 16 (if within range of land)
  • out of VHF range? if your vessel is large enough you could possible get assistance using your MF Radio (DSC or Voice)
  • or you could use a Satellite Phone or EPIRB

None of this is particularly difficult, yet many vessels still go to sea daily without any of these safety features on their vessels. They then depend on the radio that is their Mobile Phone when they are in trouble.

Any of the above methods of communication, once used in a distress situation will immediately bring into play many air and sea assets in order to render assistance. However this wasn’t always the case.

The “first rescue of a ship at sea by radio” was used was on January 23rd, 1909. It was mostly good luck that led to a successful outcome. It made a hero of the radio operator Jack Binns, but it also led the shipping companies to come to the (incorrect) conclusion that all subsequent collisions would have the same successful outcome.

Amateur Radio operators still use the “CQ” call today.