6m 18 May 2013

This Saturday morning there was a big Sporadic-E opening on 6m. There were some pretty big signals, though once again I seemed to be on the edge of the opening. The Sporadic-E seemed centered over northern Europe and you can see from the map that it was pretty intense!.

6m on 18 May 2013 at 0930z. Map from DXMaps.com

I had KComm's DX Cluster window open. I don't use the cluster on HF and dislike it intensely, but spotting stations on the cluster (in a specific format with locators for both endpoints) is how VHF contact information gets to DXMaps.com.

I saw a couple of contacts from Ireland spotted on 2m so I switched bands.

2m on 18 May 2013 at 0940z. Map from DXMaps.com

As you can see, two lucky EI stations managed to work into northern Italy, one of them using a vertical antenna! Signals must have been strong but when I QSYed to 2m I didn't hear anything. The Es must have been over the northern French coast and you can see that the same Es cloud must have permitted F6HTJ to spot the GB3ANG beacon and enabled DG7IG to work EA1CCM as the paths intersect at the exact same point..

I wasn't lucky on 2m but I was a bit more successful on data and tuned to the PSK part of the 6m band just in time to catch a French station signing off with Tim, G4VXE. I managed QSOs with Gerard F4LKG and George EA4GB but I don't think many stations were listening because my CQs went unanswered.

It seems as if the 2013 Sporadic-E season is off to a good start!

EX8MT Kyrgyzstan

This afternoon JT9-1 gave me my first contact into Kyrgyzstan, with EX8MT.

Looks a bit like the English Lake District!

TO7BC Mayotte

A good day today. Not much operating as I had to install a new PC monitor here in the shack and then a new Freetime Freesat receiver down in the living room. It's one of the new ones with WiFi support so I don't need to run a network cable down to the living room which all existing boxes have required.

After that I came up to the shack to see if I had installed any new QRM generators. Switched to 10m PSK31 and heard a single solitary station - TO7BC  from Mayotte!

I'm not a DXer but this signal on its own in the clear was too much to resist. It took about 15 minutes to break the pileup. I couldn't hear any other callers so I used XIT to dial in 0.5kHz up and hoped for the best. After a while with no success I decided to go up another 100Hz and he came right back! I must have been the only station who received a 579 report.

I shall check the website later to see if I got in the log. I will also have to find out where Mayotte Island is! I don't often get to work DXpedition stations so I'm quite pleased with this afternoon's work. I'll check for QRM generators another time.

Richer pickings on PSK

I only managed 4 QSOs in abour as many hours using JT9-1 this morning. I worked LU8EX whom I recognized having made a JT65A contact with him in the past. Hopefully more operators will make the switch from JT65A to JT9-1. At the moment it feels like I've worked everybody. I was spotted many times by VK3AMA even when I was running 5 watts. Pity there is no-one else in Oz using the mode yet.

I switched to PSK31 in the afternoon and my QSO rate immediately improved. A nice catch was Luc PR8EP whose QSL card I picture here.

Another good one was Eric HS0ZJK in Phetchaburi, Thailand. He is only the second Thai station I have worked, and both were on 15m.

JT on JT9

I had an all-day session on the JT modes today. Actually, almost all of today's contacts were on JT65A. I did listen for JT9-1 signals a few times but most of the time I only saw stations I had already worked before.

I put out a CQ call on 15m JT9-1 and Joe Taylor K1JT came back to me. I've decoded Joe's WSPR signals numerous times and I've exchanged several emails with him but I had never had a radio contact with him until now, so that was a nice surprise.

Then it was back to JT65A. The contrast in activity was extreme. There were so many stations active I couldn't find a space to call CQ, so I had to wait and pounce on new stations that called.

I must say that when using JT9 I miss the infrastructure that has been built up around the JT65A mode - the reverse beacons, the auto-spotting to PSK Reporter so you can see how far your signals have got, the JT-Alerts when you decode someone you've worked before. I especially need the B4 alerts. My memory is so bad I can't remember the calls of stations I've worked before so I have often called people who I have worked only a couple of days earlier. I guess that due to the lack of new stations they probably don't mind too much!

ISS on 20m

No not that ISS! This is station II5ISS which I worked on 20m PSK31 whilst testing some tweaks to KComm.

If you're interested, you can win an award by working II5ISS on three or more bands before the end of 2013.

Andalucia Day

I switched on the radio this afternoon, started up KComm, and the first station that printed up on the screen was EG7DCA, a special call to mark Andalucia Day. A rapid exchange of signal reports and he was in the logbook.

Andalucia Day, as this link will tell you, is the anniversary of a referendum held in 1980 in which people voted for the southern province of Spain, Andalucia, to become an autonomous region. This year that anniversary falls on 26 February, today.

I love Andalucia. The name immediately conjures up for me a vista of whitewashed villages nestling among rugged mountains, memories of walks on mountain paths and lazy days enjoying a glass or three of local wine in a tapas bar.

I often used to dream of living in an Andalucian village. I could happily have become one of the many British expats out there. But dreams don't always turn out how you imagine. The endless sunshine seems irresistible but summers can be unbearably hot and as one gets older you start to need things like healthcare, which is good, free and English-speaking in Britain. In view of what has happened to me in the last two years it's probably a good thing I didn't become an expat!

Still, I can't look at a picture like this without feeling nostalgic!

Canillas de Albaida, Andalucia

The prettiest ham and the longest call

Fifteen metres was again in good shape today. The contacts I made included the prettiest ham I've yet worked, and the station with the longest call I've ever logged.

Natali, RV3ADL

Call me a male chauvinist if you like, but whenever I work a YL (young lady) on the bands I can't resist looking to see if I can find a picture of her. I worked Natali from Moscow on PSK31 this afternoon and she must be the prettiest ham radio operator I've worked in my long career. She keeps a pretty neat shack, too.

The prize for the longest callsign ever logged goes to YO2013EYOWF which is the official call of the European Youth Olympic Winter Festival 2013 in Brasov, Romania. I pity anyone having to send that in CW! I don't have any pictures of the YO2013EYOWF operators but they do have a very pretty logo which I expect will be on their QSL.

My first JT9-1 QSO

PC4T Paul's blog post about working Tasmania with 5 watts gave me the spur to try the new JT9-1 mode, so I installed the WSJT-X software. The user interface is quite a bit different to the older WSJT programs but most of the same controls are there. I never really figured out how to use WSJT, much preferring the simpler interface of Joe W6CQZ's JT65-HF application.

Working SM5CS using JT9-1 mode

My experience with JT65-HF stood me in good stead as I was familiar with the sequence of exchanges, but I missed the JT65-HF user interface, its ability to decode all the signals in a swath of spectrum, and the alerts and built-in logging of it's companion JT-Alert application.

My first QSO, also using 5 watts, was with SM5CS - not as impressive as Tasmania but sufficient to satisfy myself that I knew how to drive the program. I'm puzzled by the panoramic display though: the two peaks of the spectrum analyzer display don't match up with the two traces shown on the waterfall.

I made the changes to KComm to allow me to log this new mode. I seem to have an increasing number of modes that I can log but not upload to eQSL.cc because the ADIF specification doesn't yet include them, though JT9 is already there.

My second DV QSO

Elie, OD5KU

Just as I was finishing writing my previous post I heard someone else calling on the 20m DV frequency. It was Elie, OD5KU. Yesterday I had heard him working a French and then a Dutch station but signals were weak and not good copy at all.

I replied to Elie but he couldn't make out my call. I tried several times and was about to give up when he called again with solid copy. Perhaps he had turned his beam my way. I tried calling one more time. This time he heard my reply and we had a good QSO with several periods of solid copy punctuated by occasional break-ups. These occurred when QSB took the digital signal down to near-invisibility in the FreeDV waterfall. I doubt that good SSB copy would have been possible at those times either.

I managed to make a recording of the end of this QSO so you can get an idea of the audio quality. It was recorded off-air using my Olympus digital voice recorder, then played back using the mic input of the USB sound dongle to make an MP3 file. Given the way it was created I think the clip is quite a good example of the FreeDV audio quality. As you'd expect from a digital signal either it's all there or you just get gobbledygook. It doesn't degrade gracefully.

Is this the future of ham radio? Have a listen and let me know what you think.

My first DV QSO

I was in the shack, messing about with ferrite rods trying to replicate Roger G3XBM's success using a ferrite rod as a transmit antenna. Meanwhile I was monitoring 14.236MHz, the 20m digital voice calling frequency.

Some audio came through the PC speakers. I didn't catch what it was, but the callsign OZ1BXN appeared below the DV application waterfall. I waited, and shortly Chris called again. We completed a QSO with 100% solid copy each side. I gave Chris 5 by 8, which was the actual K3 S meter reading, and Chris gave me 5 and 9. Chris said he was running 200W peak power. I had the K3 in DATA mode with the power level set to 25W which is the recommended level to use with a 100W transceiver. Whether that results in an average or a peak power of 25W I have no idea.

Although Chris's signal was solid copy with no dropouts the audio was rather boxy and I found it more difficult to read than a typical SSB signal. This is probably a consequence of the fact that Codec2 has been designed to use a 1.4kHz bandwidth rather than the 2.8kHz required by SSB. I can understand the thinking behind this decision but I agree with David G8JGO who commented on one of my earlier DV posts that it is a pity the codec wasn't designed to give better than SSB fidelity within an SSB bandwidth. I think that would make the adoption of digital voice more compelling. I can see many people, particularly skeptics who can't see the point of digital voice at all, being turned away by the audio quality. Has DV shot itself in the foot?

Having said that, Chris reported that I had very good audio. I had tweaked the equalisation built into FreeDV to give some treble emphasis and bass cut, so perhaps some adjustments are possible.

From attic to attic

Thanks to some excellent support from JT-Alert's author, Laurie VK3AMA, I now have my alerts fully working and have gone back to JT65A with renewed vigour. I was getting a bit frustrated as many DX stations that I could decode clearly were not returning my calls. Is there something wrong with my setup? Perhaps it was just because it was the weekend and busier than usual so that others whom I couldn't hear were replying to the same call and the DX couldn't decode any of us. A few times the station I called replied to someone else.

I still managed to work several DX stations on 10m and 15m using 30 watts of power. Best contact of the day was with KC2WUF who said that he was running 3 watts to an attic dipole. (Actually he sent "3W ATIC DP" but I got the message!) It's a pity I wasn't running QRP this end as it would have been good to have a 2-way QRP QSO attic to attic!

China on a handheld

Wu, BG6RRN

Today was cold and frosty. I was sitting downstairs in the warm browing through my newly-arrived January 2013 RadCom. In the shack my K3 was listening for beacons, my K2 was being a Robust Packet APRS gateway on 30m and my TM-D710 was being the local VHF APRS gateway whilst the other side of this dual band radio was running my Echolink node and logged in to the IRELAND conference (Echolink's equivalent of D-Star's reflectors.)

The Baofeng UV-3R+ on the table burst into life and I heard Wu, BG6RRN making a call. No-one replied to him so I called back. And so I found myself having a chat about Chinese radio equipment with a Chinese radio amateur using a Chinese handheld!

Wu spoke pretty good English - better than my Chinese anyway! He asked what I thought about Chinese radio equipment and I replied as diplomatically as possible that I liked it because it was cheap but the quality control could sometimes be better. Wu was familiar with the UV-3R+ I was using to link into my Echolink node and said that they were very popular in China as well.

Wu told me that he has had an Icom IC-7000 transceiver for a month but had so far not made any European contacts. He has never tried PSK31 so I encouraged him to try it. I hope I'll hear him on the HF bands one day. Today's chat may not have been a proper radio QSO but I do enjoy the opportunities Echolink provides to talk with hams with whom I would not otherwise make contact.

10m 22 November 2012

10m WSPR spots @ G4ILO 22 November 2012

Really excellent propagation this afternoon to the eastern USA as the WSPR spots show. An hour's break before afternoon tea resulted in QSOs with 7 new stations.  I actually had people calling me after I signed with another station. I like the callsign of the first station...

2012/11/22	14:41	28.123	BPSK31	W2PSK	599		599		Andy	South River, ...
2012/11/22	14:53	28.121	BPSK31	KB8ZUN	599		599		Jeffrey	North Ridgevi...
2012/11/22	14:57	28.122	BPSK31	KD4JMV	599		599		Harry	Naples FL
2012/11/22	15:07	28.123	BPSK31	W3SW	599		599		Andy	Binghamton NY
2012/11/22	15:20	28.120	BPSK31	KA3UJE	599		599		Terry	Lykens, PA
2012/11/22	15:26	28.120	BPSK31	WA2VMO	599		579		Bob	Staten Is. NY
2012/11/22	15:36	28.121	BPSK31	KB3CUP	599		599		Elza	Greensboro, PA

20 November 2012

Today my main rig has spent even more time on other things than WSPR. Besides trying to work some PSK31 DX I have also been testing a beta release of K3 firmware. This new version has an improved CW decoder that is a bit less finicky about settings. It works very well but is still beaten by the Windows program MRP40 which I regard as the gold standard for CW decoders. As Wayne N6KR says, the MRP40 algorithm is probably ten times more sophisticated and the K3 MCU doesn't have enough code space for it.

I've been interested in Morse decoders since the first home computers and can remember keying in a program listing in BASIC from a QST article in the late 70s. Later I wrote a decoder in Hisoft Pascal which ran on my ZX Spectrum. It actually decoded strong, perfectly sent Morse but it was not reliable enough to be useful. More recently I tried implementing a Morse decoder in KComm but it was a total failure.

I didn't have a lot of success with PSK31 DXing on 10m either. I only made two contacts but I heard what would have been two new South American countries: HC7AE in Ecuador and CE4BRO in Chile. I didn't need to look up HC in a book as I remember from my teenage SWLing days hearing HCJB Quito, the Voice of the Andes!

I think band conditions were better today but they supported more propagation from Europe so there were higher QRM levels (and lower operating standards ;) ) I moved up the band to try and get away from all the IMD products but hardly anyone was listening up there so it was a bit futile.

Someone who did hear my CQ calls was Vito IZ7DMT. He was a whopping signal but was signing IZ7DMT/QRP. He told me he was running 5 watts from an FT-817 and was rather indignant that I wouldn't use the illegal /QRP suffix during handovers. Nice QSL though!

Here is the result of today's WSPRing:

10m WSPR spots @ G4ILO 20 November 2012

10m 18 November 2012

I nearly got myself locked out of the WSPR map page today. I must have managed to save the settings to try to display spots for all bands for the last 24 jours, or something like that, because whenever I went to the page the web browser froze up while it tried to render the map and I couln't get back to the settings boxes to change it. I had to find out how to delete all cached files in Chrome before I could access it again.

10m WSPR spots @ G4ILO 18 November 2012

I lost quite a lot of time trying to sort that out. I also spent an hour or so seeing what I could work on 10m PSK31. I managed to QSO with several US stations including N7WET in Tucson, Arizona and KB5IAV in Baton Rouge, Louisiana.

I worked two all time new countries as well. Fabio CU3HN in the Azores has one of those QSLs that never fail to bring a smile to my face.

QSL of CU3HN

Victor, HP1AVS in Panama I had heard before but not managed to work. So I was pleased to add his call to the log as well.

QSL of HP1AVS

I love 10 metres!

10m wide open!

Ten metres has been wide open today. Stations have been heard or worked in just about all directions. I ran 2 watts of WSPR during the periods that I wasn't in the shack and the program screen resembled 30m!

WSPR spots on 10m at G4ILO, 26/9/2012

After a short period of WSPR I switched to voice mode and made a nice SSB contact with Ken, JA2FJP near Nagoya (nothing to do with cheap Chinese antennas!) After a rubber-stamp contact with R100BG I found phone a bit hard going with all the QRM and pileups so I retreated to the more restful pastime of working digimodes.

Digital stations hrd/wkd at G4ILO, 26/9/2012

I made one more Japanese contact - with JI4POR - and made my first-ever China contact - with BG8GAM - all on PSK31. I heard several more stations from those countries and also one from Korea (South, presumably) and one from Indonesia but didn't manage to work them. Better luck next time!

A session of calling CQ produced an endless succession of Russian stations. Where do they all come from? There is no chance of working interesting DX unless you search and pounce on the DX stations. Even when calling a specific DX station I was being called by Russian stations! Why do they do it? I lost the chance of a couple of first contacts because of it.

As the afternoon wore on many stations from North America and Canada started to be in evidence. My final PSK31 contact for the day was with Bob KZ0G in Missouri which is probably a first for that state for me.

Not a bad haul for a few hours listening / operating using a maximum of 40 watts PSK31 to an attic dipole. I wish there were more days like that!

PSK31 to Amman, Jordan

Conditions have been good recently on 15m. On that band I have a choice of two antennas - the multiband dipole or the magnetic loop. The multiband dipole doesn't actually have elements for 15m so on that band I think the 40m element must do the work. The K3 ATU is needed to produce a good match.

There is quite a big difference in performance between the two antennas on 15m. The magnetic loop, surprisingly, has a higher noise level but it also produces stronger signals on some stations. On other stations the dipole seems best. It's a pity I don't have a sub-receiver in the K3. It would be interesting to try diversity reception one day.

Amman, Jordan

Whenever a band is open you can usually find some PSK31 activity even if you can't hear any phone. That was the case yesterday on 15 metres when I worked Nart, JY5IB from Amman, Jordan. That's an all-time new country for me so I was very pleased to get him into the log. On this occasion it was the magnetic loop that did the job.