AmateurRadio.com

JT65A is a wonderful mode, and JT65-HF by Joe Large W6CQZ is a wonderful program that makes it enormous fun to operate. True, the mode only allows the exchange of signal reports, though a very brief amount of extra information (such as power and antenna) can be sent in a custom message. But so many contacts using other modes also only result in the exchange of such limited information. On the other hand, there is a certain magic in seeing faint musical tones sent by a faraway station translated into a message on your screen. Many people have said that JT65A is addictive. I agree.

If there is one problem with the mode, it is that the 50 second transmit cycles where nothing is decoded on to the screen until the end makes it easy for your attention to wander. I’m ashamed to admit it, but many is the time someone has replied to my calls and I missed it because my mind was elsewhere. So I was really pleased to discover an add-on for JT65-HF written by Laurie VK3AMA called JT-Alert. One of a pair of add-ons he has written (the other is a kind of macro tool for custom messages) it watches the decoded text and sounds an audible alert when a CQ call is received or when a station replies to your call. You can have different sounds for the two alerts, and the audible alert is optional and can be disabled. The tool can dock to the bottom of the JT65-HF window (as in the screenshot above) so the two function as one program.

I have been monitoring for activity on ten metres, which is dead most of the time. It would get pretty boring sitting in front of a blank window for hours at a time but I have set the CQ alert to a loud klaxon which will bring me running to the shack from wherever I am in the house if/when a call on 10m is received. It’s a really useful tool (though it does get a bit annoying when working on 20m and my XYL isn’t so keen on it either!)

I made a number of nice contacts on 20m using JT65A today, including CO2VE (Cuba), PJ2MI (Curacao) and LU6AM (Argentina). I also worked a fellow blogger, David K2DBK. Unfortunately my custom message to David didn’t get sent as I got caught by a quirk in the JT65-HF program that was pointed out to me later by members of the JT65-HF support group. Apparently if you start a message with 73, those two characters are sent as a special shorthand sequence and the rest of the custom message is ignored. I had actually read that in the documentation, but I’m afraid due to the onset of senility RTFM often isn’t the answer as I FTFM (Forget The Frigging Manual) immediately after I’ve read it. Oh well.  🙁

It was a fine afternoon and I needed some exercise so I took the VX-8GR and the Albrecht 10/12m handheld and went for a stroll over Watch Hill. I put out a call on the 2m FM calling frequency and was answered by Jim, G3XPD, a few miles away. I asked if he could QSY to 28.500MHz SSB and he said he could, so I was able to make my first contact with the new radio.

When I first heard Jim call on 10m his audio was clear but very weak. This was puzzling when he told me he was hearing me quite well and was running 100W to my 4W. Eventually I realized this was due to the RF gain setting of the Albrecht. It is accessed via a few button presses, effectively on a menu, so I had left it as it was set by default. This clearly made the gain very low. After winding it up to maximum (see, I’m turning into a CBer!) Jim’s modulation was rattling the loudspeaker. No shortage of gain there, for sure.

The receive audio was very clear. Jim commented on some wind noise on my transmissions, which I was able to tame by changing position so the internal microphone was shielded by my head. I didn’t ask if he could hear any FM on my SSB modulation and he didn’t mention it. That’s good, as it suggests the problem isn’t noticeable enough to prevent making contacts and there is no urgency to try the modification that is supposed to cure it.

The main problem would seem to be tuning the radio on SSB. The Albrecht AE2990AFS is basically a CB radio designed to work on fixed 10kHz channels, even though it does have dedicated ham band modes. The tuning steps of the radio are 10kHz just like a CB radio. You can press a couple of buttons and select 500Hz steps but you can’t tune the band this way. You can tune in 500Hz increments up to just before the next 10kHz multiple then the VFO rolls back to where you started.

There is a clarifier or RIT control which is designed to tune in stations that are slightly off the 10kHz channel. It’s range is something like +/- 5kHz so it is quite touchy. There is no centre detent to mark the off position. What this all means is it’s quite hard to tune the band looking for signals and if you do tune someone in the chances are you’ll call them off-frequency.

A better solution, in my opinion, would be to dispense with RIT and make the clarifier change both the transmit and receive frequency. But if it was possible to do that one wonders why the manufacturer didn’t. I imagine that the control works by pulling an oscillator using a varicap diode so there is a risk of making the FM problem worse under the varying load conditions of SSB transmission. But if it could be done without affecting the transmitter frequency stability that would be a mod worth doing.

In the wake of the Japanese nuclear disaster there has been a surge of interest in interfacing Geiger counters to home weather stations so that radiation levels could be monitored via APRS. When you think about it, it seems a very good idea. Even if the measurements were not of lab grade accuracy, they would be good enough to show what was going on. It could avoid unnecessary panic – and equally make it impossible for officials to hide the existence of a radiation leak – if data from a network of amateur radiation monitoring stations worldwide was publicly available. This could be a real application to make APRS relevant even to the general public.

A standard for representing radiation measurements in APRS weather packets is being worked out as I write. The question is how to interface a radiation monitor to an APRS system and what hardware is needed to measure the radiation? Unfortunately, if not surprisingly, the final bid price of dosimeters on eBay has gone through the roof in the last couple of days. But in any case they all seem to be standalone instruments with no computer interface. I don’t know if a homebrew device would be possible, given that calibration would be needed, but if someone could develop one I think it would be a popular project.

Like anyone with an ounce of compassion, Olga and I have been concerned about the welfare of the people of Japan. But it is becoming clear, at least to me, that most of the anxiety we initially felt about a nuclear catastrophe occurring in the country has been caused entirely by irresponsible and sensationalist reporting by the western mass media.

Scrolling news headlines screamed about fear of meltdown even while nuclear experts on the same channels were explaining how, due to the design of the reactors, this wasn’t likely. Fear has been generated over increased radiation levels in Tokyo causing many expatriates to flee home, many on the advice of their own western governments. But whilst reporting these increased levels, the news media have not bothered to put them into context, such as how the amount of radiation compares with that received on the flight home to London or on a holiday in Cornwall in the south west of England, a place where the naturally occurring level of radiation is so high that nuclear plants cannot be built there because they would exceed the legal radiation limits before they even started.

Yesterday, apparently, the Italian relief agency did a test for radiation on the roof of the Italian embassy in Tokyo and got a reading which is lower than the usual reading in Rome! The problems with the Fukushima reactors are almost a non-event compared to the tsunami which has displaced half a million people and wiped whole towns off the map. If the rest of the world wants to help Japan it should get a grip and focus on the real disaster.

In my search to try to find out what is really going on I have found a couple of blogs which I have added to my blogroll. The first is A Brasspounder’s Cafe by Leo, JJ8KGZ. He has just begun to write about his experiences during the earthquake last Friday. The second, The Intercultural, is written by a British academic working in Tokyo. The author is not a ham at all, but the blog is very well written. Finally I have added the blog of Atsu, JE1TRV which is called CW4EVER. He hasn’t written much about the disaster and his interests are a bit different than mine but my blog was already in his blogroll which is good enough for me to add his to mine!

Meanwhile we continue to think of the people of northern Japan, and especially the 50 heroes struggling to regain control of the power plants at Fukushima, and hope that things start to get better for the Japanese people very soon.

Over at “the Brasspounders Cafe” blog, Leo, JJ8KGZ, gives a first hand account of what his experiences were of the earthquake that struck Japan recently. I recommend you read his The 3.11 post.

Our thoughts are with the all the people in Japan as they work to recover and deal with the aftermath and challenges resulting from the earthquake and tsunami.  Donations are being sought for that region through the usual organizations, web searches will reveal your national charities or try organizations like the International Committee of the Red Cross or  Médecins Sans Frontières. Canadians can use the Canadian Red Cross or see the list at CBC’s website for donations.

Welcome to Handiham World!

Photo: Fukushima nuclear plant near Okuma, Japan before the earthquake and tsunami damage. View shows three cooling towers and one of the reactor buildings with ocean and docks to the right of the picture. Image courtesy Wikimedia Commons, from Wikipedia.

The unfolding tragedy in Japan is front and center in our minds this week. I talked with long-time Handiham volunteer Mark Booth, WA0PYN, earlier this week. He had already handled a couple pieces of health & welfare traffic on 20 meters. ARRL is keeping us up to date on its website, so there is no need to go into detail on events that are already being covered at ARRL.org. Rick Palm K1CE, edits the ARRL ARES E-Letter, which refers amateurs to the ARRL.org story “Japan Asks Radio Amateurs to Keep Frequencies Clear As Country Goes into Recovery Mode after Devastating Earthquake”. Information about the operations of the JARL HQ station JA1RL and the list of frequencies are found in that ARRL story. We suggest checking ARRL.org periodically for updates.

Some of our members who check into the daily Handiham net have been asking about Shinji, JA7QHM. I have not heard from him and would appreciate any news if anyone else has contacted him recently. Shinji had regularly checked into the Handiham net, but usually in the summertime when Daylight Saving Time is in effect. This makes the timing a bit easier as he doesn’t have to stay up so late. I called him on Skype this morning but there was no answer or voicemail message.

As long as I mentioned DST, I might as well remind everyone that the Handiham net stays true to local time. That means the difference between GMT and Minnesota time becomes 5 hours instead of 6. Since we are west of Greenwich about 1/4 of the way around the globe, GMT is always ahead of us. By the time the Handiham net is getting underway in the late morning in Minnesota, it is already late afternoon in Europe. You might think that it would be easier to stick to UTC, or “Coordinated Universal Time”, which is the same as what us older guys refer to as “GMT”. We tried that years ago, but the confusion about the net made the “tech support” just about impossible. We gave up on that and returned to keeping the net at local time, which means that it shifts one hour relative to UTC (GMT).

Since today is Wednesday, that means we also have the evening net to think about. We meet once again at 19:30 hours Minnesota time (7:30 PM), which is at 00:30 hours GMT, or just after midnight in Universal Time. If you are in Europe, that makes it slightly easier to check in because you don’t have to stay up quite as late.

All of this reminds me that we are such a worldwide system, email remains the tried and true way to touch base for many of us. It’s a great way to work around all of these time shifting issues. I’m not sure if all of you knew about it, but my son Will, KC0LJL, spent a semester studying in Japan last year and made many friends there. We also had quite a parade of Japanese exchange students though our home over the past year, so obviously we have an interest in keeping track of how they are doing. Facebook has been a great contact tool and, as ARRL points out, internet connectivity has remained good in most of Japan. We are considering a Handiham group under the wing of Courage Center’s Facebook page. Although I prefer email to using Facebook for individual messages, I know that this new media is more and more in the news these days and sometimes general interest stories in ham radio might be better covered in a Facebook forum. ARRL is on Facebook, as are many ARRL and Handiham members. It’s something to think about for sure!

Finally, the Japanese situation includes a nuclear reactor emergency. This is bound to create a new awareness of communications preparedness related to ARES training. Some time back, a local ARES group here trained with other emergency services personnel in a mock nuclear plant scenario. It will be interesting to see what new procedures might come about as we learn more from following the news and response to the Fukushima nuclear plant damage. Communications technology and procedures are always changing to meet new and different challenges.

ARRL members who wish to receive the ARRL ARES E-Letter may manage their mailing lists directly from the member section of ARRL.org.

Patrick Tice, WA0TDA
Handiham System Manager
[email protected]

Welcome to Handiham World!

Photo: Fukushima nuclear plant near Okuma, Japan before the earthquake and tsunami damage. View shows three cooling towers and one of the reactor buildings with ocean and docks to the right of the picture. Image courtesy Wikimedia Commons, from Wikipedia.

The unfolding tragedy in Japan is front and center in our minds this week. I talked with long-time Handiham volunteer Mark Booth, WA0PYN, earlier this week. He had already handled a couple pieces of health & welfare traffic on 20 meters. ARRL is keeping us up to date on its website, so there is no need to go into detail on events that are already being covered at ARRL.org. Rick Palm K1CE, edits the ARRL ARES E-Letter, which refers amateurs to the ARRL.org story “Japan Asks Radio Amateurs to Keep Frequencies Clear As Country Goes into Recovery Mode after Devastating Earthquake”. Information about the operations of the JARL HQ station JA1RL and the list of frequencies are found in that ARRL story. We suggest checking ARRL.org periodically for updates.

Some of our members who check into the daily Handiham net have been asking about Shinji, JA7QHM. I have not heard from him and would appreciate any news if anyone else has contacted him recently. Shinji had regularly checked into the Handiham net, but usually in the summertime when Daylight Saving Time is in effect. This makes the timing a bit easier as he doesn’t have to stay up so late. I called him on Skype this morning but there was no answer or voicemail message.

As long as I mentioned DST, I might as well remind everyone that the Handiham net stays true to local time. That means the difference between GMT and Minnesota time becomes 5 hours instead of 6. Since we are west of Greenwich about 1/4 of the way around the globe, GMT is always ahead of us. By the time the Handiham net is getting underway in the late morning in Minnesota, it is already late afternoon in Europe. You might think that it would be easier to stick to UTC, or “Coordinated Universal Time”, which is the same as what us older guys refer to as “GMT”. We tried that years ago, but the confusion about the net made the “tech support” just about impossible. We gave up on that and returned to keeping the net at local time, which means that it shifts one hour relative to UTC (GMT).

Since today is Wednesday, that means we also have the evening net to think about. We meet once again at 19:30 hours Minnesota time (7:30 PM), which is at 00:30 hours GMT, or just after midnight in Universal Time. If you are in Europe, that makes it slightly easier to check in because you don’t have to stay up quite as late.

All of this reminds me that we are such a worldwide system, email remains the tried and true way to touch base for many of us. It’s a great way to work around all of these time shifting issues. I’m not sure if all of you knew about it, but my son Will, KC0LJL, spent a semester studying in Japan last year and made many friends there. We also had quite a parade of Japanese exchange students though our home over the past year, so obviously we have an interest in keeping track of how they are doing. Facebook has been a great contact tool and, as ARRL points out, internet connectivity has remained good in most of Japan. We are considering a Handiham group under the wing of Courage Center’s Facebook page. Although I prefer email to using Facebook for individual messages, I know that this new media is more and more in the news these days and sometimes general interest stories in ham radio might be better covered in a Facebook forum. ARRL is on Facebook, as are many ARRL and Handiham members. It’s something to think about for sure!

Finally, the Japanese situation includes a nuclear reactor emergency. This is bound to create a new awareness of communications preparedness related to ARES training. Some time back, a local ARES group here trained with other emergency services personnel in a mock nuclear plant scenario. It will be interesting to see what new procedures might come about as we learn more from following the news and response to the Fukushima nuclear plant damage. Communications technology and procedures are always changing to meet new and different challenges.

ARRL members who wish to receive the ARRL ARES E-Letter may manage their mailing lists directly from the member section of ARRL.org.

Patrick Tice, WA0TDA Handiham System Manager [email protected]