AmateurRadio.com

I do not do much operating in my radio room in the house, most of my operations are done portable. But for some time now I have been plagued with some major noise to my rigs, the noise is about S9 or more at times and varies on certain frequencies and sometimes with odd sounds.

Not too long ago I had rebuilt my 24v battery pack for my PRC-104 with NiMh batteries, what I had found when the charger was working was the noise was atrocious, once battery was charged the noise would subside but I guess it was never totally gone. So one day when all of our power was down for a tree on the line I tested the radios with battery and found zero noise levels, none what so ever, so it lead me to start searching a bit deeper, looking at TV noise, routers etc, but still no luck nailing the problem.

So I continued to do a bit of more pulling of plugs and seeing what and where the noise could be coming from. I own many types of battery packs and chargers, batteries for radios, cameras and scanners, so I had to start one at a time. I leave the chargers always plugged in ready to go, so never really anticipated that this would be my issue. But I was very surprised when I found two of my chargers that were the problem.

The one charger was indeed my smart charger for my NiMh battery pack for my PRC-104.

 

The other charger that turned out to be an issue was a Duracell battery charger that I use for my camera batteries. It was amazing at how quiet things got once they were unplugged. The noise on my VX-1700 with these chargers plugged in and not being used would be a solid 9 and more, once I unplugged both of these units the noise dropped to a 3 and I could hear stations once again. I need to look at some of the other chargers in the house that are used for routers and other items in the house.

The NiMH charger when charging makes all bands useless when it is actually charging, the charger for my VX-1210 is the same, very loud noise levels emitted from these units.

So I am glad I did a bit of unplugging and checking and have found some of the issues that have plagued the home shack. Many of today’s electronics is just plain noisy and does emit all kinds of stray RF and noise.

Fred Lesnick, VE3FAL, is a regular contributor to AmateurRadio.com and writes from Thunder Bay Ontario, Canada. Contact him at [email protected].

Some years ago (in my fit days) I build a simple DSB WSPR rig for 10m based around a low cost 14.060MHz crystal bought from the GQRP club.  The idea was to pull and double this crystal and use it in a simple DSB TX and direct conversion RX.  Both TX and RX have been built separately, but I was ill before I got around to combining the 2 into a 10m WSPR transceiver. Both parts worked well.

See https://sites.google.com/site/g3xbmqrp3/hf/wispytx .

Roger Lapthorn, G3XBM, is a regular contributor to AmateurRadio.com and writes from Cambridge, England.

One of the best rigs I once owned was the 10W Icom IC703. This was a well equipped QRP radio with a decent receiver, DSP and auto ATU. I sold it to a local amateur who was a poor pensioner but I regret selling it now! No fan needed at 10W.  Just a first class rig.

See https://sites.google.com/site/g3xbmqrp3/hf/ic703 .

Roger Lapthorn, G3XBM, is a regular contributor to AmateurRadio.com and writes from Cambridge, England.

From time to time I have heard of those of who manage to contact 100 DXCC countries during one weekend. This past weekend it was my turn to try.

If you have a contest station with 1 kW and monoband yagi antennas, then this goal shouldn’t be too hard. But for my station with only an 80 m horizontal loop (loop skywire) circling its way through my garden from treetop to treetop and 100 W of transmitter power from my K3, the challenge was greater.

About 6 hours before the end of the test and with 87 countries, I had almost given up so I sent the tweet above. The status for the second day of the contest was that I had only worked two more countries.

But then in the final hours I heard and then contacted Tunisia, Malaysia, Australia og Kosovo (Z6) to bring me to 91, and then Laos and Albania. But then it took a long while for some new ones: Spanish Africa (EA9) and Argentine. I also managed two more Caribbean stations (J3 and CO) and Peru and Sardinia.

Finally in the last hour of the contest two more Caribbean stations (PJ2 and VP9) and in the end Mexico 21 minutes before the end of the contest. That brought the total to 102. I think that was needed as Kosovo isn’t really an approved country and I also had contact with what was probably a pirate and not a station from Andorra. That signature was C31XR which most likely is the name of an antenna and not a real station.

My total was 47 European countries, 19 from Asia, 12 from North America, 10 from Africa, 9 from South America and 3 from Oceania. I think it helps to be in Europe as I had almost half of the countries quite close by, but it would be interesting to hear comments from North Americans on how realistic they consider this goal to be from their location.

Sverre Holm, LA3ZA, is a regular contributor to AmateurRadio.com and writes from Norway. Contact him at [email protected].

From time to time I have heard of those of who manage to contact 100 DXCC countries during one weekend. This past weekend it was my turn to try.

If you have a contest station with 1 kW and monoband yagi antennas, then this goal shouldn’t be too hard. But for my station with only an 80 m horizontal loop (loop skywire) circling its way through my garden from treetop to treetop and 100 W of transmitter power from my K3, the challenge was greater.

About 6 hours before the end of the test and with 87 countries, I had almost given up so I sent the tweet above. The status for the second day of the contest was that I had only worked two more countries.

But then in the final hours I heard and then contacted Tunisia, Malaysia, Australia og Kosovo (Z6) to bring me to 91, and then Laos and Albania. But then it took a long while for some new ones: Spanish Africa (EA9) and Argentine. I also managed two more Caribbean stations (J3 and CO) and Peru and Sardinia.

Finally in the last hour of the contest two more Caribbean stations (PJ2 and VP9) and in the end Mexico 21 minutes before the end of the contest. That brought the total to 102. I think that was needed as Kosovo isn’t really an approved country and I also had contact with what was probably a pirate and not a station from Andorra. That signature was C31XR which most likely is the name of an antenna and not a real station.

My total was 47 European countries, 19 from Asia, 12 from North America, 10 from Africa, 9 from South America and 3 from Oceania. I think it helps to be in Europe as I had almost half of the countries quite close by, but it would be interesting to hear comments from North Americans on how realistic they consider this goal to be from their location.

Sverre Holm, LA3ZA, is a regular contributor to AmateurRadio.com and writes from Norway. Contact him at [email protected].

If you haven't seen this by now, you'll want to check it out! It seems that the world of astrophysics has been set all agog by a brilliant Australian undergraduate student's recent discovery. Cleo Loi from the University of Sydney has used a combination of radio telescopes to prove the existence of earth-surrounding tubular plasma ducts. Travelling from the ionosphere to the edges of space, these multi-layered plasma tubes were believed to exist but were never proven ... until Ms. Loi and her team managed to image them:


What the implications might be when it comes to their influence on radio propagation, if any, remains to be seen but I suspect that astrophysicists all over the world are having a close examination of long-held theories and the implications on their own fields of study.

You can read more details about this exciting discovery here.
Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].

The Idea Factory by John Gertner tells the story of Bell Labs from the 1930s to 1990s.  Bell Laboratories was the research arm of AT&T, the US phone company that had a monopoly position for decades, providing local phone service, long distance, and telecommunications equipment.  I just finished the book yesterday, and I highly recommend it. 

Bell Labs was responsible for so many innovations and discoveries it is mind-boggling. In fact, it’s difficult to find a modern device or technology Bell Labs didn’t have some involvement in or influence on.  Some of the things they accomplished include inventing the transistor and solid state electronics, developed microwave communications, created the Unix operating system, created automated electronic switching of telephone calls, developed fiber optics, authored information theory which lead to the creation of the digital computer, developed integrated circuits, created lasers, launched satellites, invented solar cells, and designed cellular telephone.  Bell Labs was perhaps the greatest collection of inventors, scientists, physicists, chemists, mathematicians, academics, and metallurgists ever assembled.  What made Bell Labs so unique and so successful?  Some reasons include:

1. Bell Labs researchers understood how and why the technology worked.  It was a departure from “cut and try” inventing, like that of Edison.
2. All employees could talk to and mingle with any other employee, and the buildings and corporate culture was designed to insure this interaction.  Junior researchers could bounce ideas off of senior (and often famous) employees in hallways, meeting rooms, and even in dinners in their home living rooms.
3. There was no direct motivation to produce usable, profitable products.  Some technology research, like the laser, even had no identifiable problem to solve or real life application at the time.
4. There was no pressure for researchers to seek funding or grants.  Funding came from revenue from the long distance and local telephone service operating companies of AT&T.
5. Research projects that were not bearing fruit could be ended without damning the researcher.
6. Researchers were free to pursue their own side projects and interests, and were actually expected to take on projects other than their direct assignments.
7. Bell Labs shared all technology and research with the public, due to an agreement with the US government in exchange to preserve its monopoly.

From the start of research to use in “The System” as they called the Bell System, was usually 20 to 30 years.  Technology and equipment were designed to last 40 years, or more.  Bell Labs was split from AT&T after Divestiture in 1984 and is now a shadow of itself, a division of Alcatel Lucent, still in the buildings in Murray Hill, NJ where the transistor was invented.  Their innovations continue to live on in most electronics and communications we use today.

Gertner covers the technologies and inventions of Bell Labs, skillfully and accurately describing them in a way that non-techies can understand but also resonates with technical geeks like me.  More importantly he goes in depth into the history of the people that made it all happen, people like Claude Shannon, Mervin Kelly, John Pierce, and William Shockley, not only talking about their accomplishments but also their culture, family, struggles, idiosyncrasies, and failures.

The book ends with somewhat of an indirect commentary on the demise of Bell Labs and the irony in that the technology they created led to Silicon Valley and the bubble/IPO/get rich quick and quarterly corporate financial results mentality we have today.  It’s no longer possible to achieve the monumental discoveries in major leaps like Bell Labs accomplished.  Unfortunately we have resigned ourselves to incremental improvements focused mainly on selling products, and not the pursuit of pure science and technology, which ultimately leads to better products and improvements in our lives.  Gertner makes note of the outstanding accomplishments of Bell Labs in light of the relationship with AT&T, the government, and the monopoly that was maintained, noting that it shows the tight relationship between government and capitalism.  I think there are lessons to be learned by both sides of the political spectrum from this, in regards to government involvement and regulations, and large corporations, both of which are often demonized today.

The Idea Factory doesn’t specifically mention amateur radio, but undoubtedly many radio amateurs worked at Bell Labs.  I think the book and the story of Bell Labs offers some lessons for us, however.  While none of us will have grand accomplishments like Claude Shannon, we can be be innovators, be creative, and pursue technology and science for merely the sake of pursuing it.  Most of the major Bell Labs researchers came from modest means, often in rural America.  The next Brattain or Bardeen may be that young kid in our midst who is interested in radio, astronomy, science fiction, or microcontrollers.  We need to not be satisfied with just being operators of radio technology, but understand it and experiment, and create.

My writing can’t do Bell Labs or The Idea Factory justice, however if you’re into technology and innovation, I highly recommend this book.

This article originally appeared on Radio Artisan.

Anthony, K3NG, is a regular contributor to AmateurRadio.com.