AmateurRadio.com

For our local 2m net, the Net Control Station asks a Question of the Night to stimulate some discussion. Recently, the question was:

Do you have any interest in CW. If yes, Do you currently operate CW or do you plan to learn? If you have no interest in CW, what other modes besides voice do you operate on or would like to?

I am not a huge CW fan, but I do use it from time to time, especially when it comes to squeezing out difficult contacts on VHF or UHF. However, this question had me thinking about the various modes I have operated, so I made a list:

SSB - quite often on HF, VHF, UHF
CW  - not nearly as often but on HF, VHF, UHF
FM/PM - lots of VHF activity here, 2m FM is the Utility Mode
AM  - a few times, just to check it out
RTTY - I used to do this often but my interest has faded
PSK31 - I used to do this often but my interest has faded
FT8 - this one has taken over my digital operating
FT4 - a faster alternative to FT8, often better to use
Q65 - I just started using this for weak-signal VHF/UHF
MSK144 - for meteor scatter, but I haven't done that for a while
AX.25 - VHF packet radio, including APRS
DMR - the most common digital mode in Colorado
D-STAR - I used D-STAR when it first came out but lost interest
C4FM - Yaesu Fusion, I've used it a few times

Each one of these modes has a story behind it…often I was just looking for something new to try. (If you find yourself getting bored with ham radio, it might be time to try a new mode.)

This list also reminds me that I need to get back to chasing grids on the 2-meter band, using CW, SSB, FT8, MSK144, and Q65. I have a new tower up that I’ve not taken full advantage of for VHF/UHF.

That’s my list of modes used, what does your list look like?

73 Bob K0NR

The post Which Modes Have You Operated? appeared first on The KØNR Radio Site.

Lately, I’ve been getting questions about whether a ham needs to log radio contacts, whether they need to submit a log, and how to do it. Logging is a complex topic that can require a long and detailed explanation, but I am going to focus on the questions I’ve been hearing lately. I’ll also provide some links for further investigation. For starters, the ARRL has a good introduction to logging.

Why Keep A Log?

The FCC does not require you to log your amateur radio contacts. Many radio amateurs, especially if they just operate casually on 2m and 70 cm, don’t bother to keep a log. Probably the most common reason for having a log is to have a record of your radio contacts, in terms of stations worked, on what band and what conditions. This might be just for your own personal satisfaction or you might want to keep track of these contacts so you can get credit for an award, such as the ARRL Worked All States award.

Paper or Electronic?

The Old School way of keeping a log is on paper as shown in the figure above. This approach is simple and reliable technology but is quite limited in the information age. These days, most hams that record log information store it electronically. Imagine that you log thousands of contacts over time and then want to find a particular callsign or location. Much better to do this electronically. There are many good software programs available, too many to list here. I currently use Amateur Contact Log from N3FPJ. The good news is that there is a standard file format for storing and moving ham radio contact information: Amateur Data Interchange Format (ADIF). If you want to change logging software, you export an ADIF file and import into the new program.

I Worked a Contest Station, Do I Have to Submit a Log?

Sometimes radio ham works a few stations that are active in a particular contest and they wonder if they must submit a log to the contest authority for these these stations to get credit for the contacts. The almost universal answer to this is: No. Don’t worry about submitting a contest log if you aren’t really “in the contest.” The stations you work still get credit for your contact with them. (This is true for all major contests…I am still looking for a contest where this is an issue.) Contests are designed to encourage activity, so they want everyone to join in, even if they aren’t all that serious about contesting. (The contest sponsors will appreciate any and all logs submitted, so consider that.)

If I Am Actively Working a Contest, What Do I do?

If you are actively participating in a contest, you should use a logging program that is tuned for that particular contest. This is important because the contest logging software knows about the scoring for the contest and lets you know if you have already worked a station you hear. The most popular logging software for contesting is the N1MM Plus software. There are other programs you can consider. Typically, you would use N1MM during the contest and then export the info into an ADIF file, which is imported into your “main” logging program.

What is a Cabrillo File?

While the ADIF file format is most universal in ham radio logging, there is another file format used for contesting. This is the Cabrillo file format. Your contest logging software can generate a Cabrillo file for submitting to the contest sponsor. You may also want to generate an ADIF file for your normal logging program.

I Worked a POTA Station, Do I Have to Submit a Log?

Parks On The Air (POTA) is set up such that only the activator station submits a log. If you are working an activator station, you are a hunter station. The POTA scores are all based on the activator logs and hunters cannot submit a log. What you can do is register on the POTA website to see the contacts that the activators have submitted for you.

I Worked a SOTA Station, Do I Have to Submit a Log?

Summits On The Air (SOTA) is set up so that both activators and chasers submit logs to the SOTA website. However, the SOTA system operates on the honor system, so an activator can claim a contact with you without you submitting a log. So if you hear a SOTA station, go ahead and work them. You don’t have to submit a log. On the other hand, if you want credit for chasing a summit, you need to submit a log. So that activator is fine not having you submit a log but you may want to do that to get credit for you.

How Do I Get Credit For Working A Country?

The gold standard for chasing countries, I mean entities, is DX Century Club (DXCC). If you are interested in DX, you should register with Logbook of The World (LoTW) with the ARRL. To get credit for working an entity (country), you need to submit your log and it must match the log submitted by the DX station. This is a higher level of confirmation because both parties must submit the log info and it must match within reasonable error limits.

There are other award systems for working countries, offered by QRZ, eQSL, etc.

How Do I Get Credit For Working a Grid on VHF/UHF?

The VHF UHF Century Club (VUCC) is the VHF/UHF equivalent to DXCC. Here the emphasis is on working maidenhead grid locators on the bands above 50 MHz. Again, Logbook of The World is the database that authenticates confirmed contacts on these bands. Both parties must submit the log info and it must match within reasonable error limits.

What If Someone Needs My Log Submitted?

Most of the time, us normal hams are not considered DX. That is, that other station in the Cayman Islands doesn’t really need our contact confirmed. But there are exceptions. You might be in a state the other station needs confirmed. Or maybe it’s your county they need. In such a case, you might want to make a special effort to provide your log information to the right database. It will depend on what the other station needs…if they are going for an ARRL award, then Logbook of The World is the right place to upload your log. But they might be after a QRZ award or eQSL award, it which case you would need to provide your log to those websites.

Wrap Up

These are some of the questions I’ve been hearing.
What did I miss?
Anything else to add?

73 Bob K0NR

The post Should I Submit A Log? appeared first on The KØNR Radio Site.

Commemorating 80 years 

An important stage in the liberation of Western Europe

Operation Market Garden was an Allied military operation during the Second World War fought in the German-occupied Netherlands from 17 to 25 September 1944. Its objective was to create a 103 km salient into German territory with a bridgehead over the Nederrijn (Lower Rhine River), creating an Allied invasion route into northern Germany. This was to be achieved by two sub-operations: seizing nine bridges with combined US and British airborne forces (´Market´) followed by British land forces swiftly following over the bridges (´Garden´).

The airborne operation was undertaken by the First Allied Airborne Army with the land operation by XXX Corps of the British Second Army. The airborne soldiers, numbering more than 41,000, were dropped at sites where they could capture key bridges and hold the terrain until the land forces arrived. The land forces consisted of ten armoured and motorised brigades with a similar number of soldiers. The land forces advanced from the south along a single road surrounded by flood plain on both sides. The plan anticipated that they would cover the 103 km from their start to the bridge across the Rhine in 48 hours. About 100,000 German soldiers were in the vicinity to oppose the allied offensive. It was the largest airborne operation of the war up to that point (Wikipedia ©). Perhaps the most famous, after D-Day, in the history of the Second World War.

As part of Operation Market Garden paratroopers of the Allied forces, such as American, British, Canadian, Polish and Dutch troops, landed in the Nijmegen region on 17 September 1944. The region became a battlefield during Operation Market Garden and most of the inhabitants took refuge in the woods or neighbouring towns. It took more than a week of heavy fighting before parts of the region were temporarily liberated. Many people and military were killed and buildings and bridges were destroyed. At the cost of many young soldiers the important Waal-bridge in Nijmegen was conquered. In our collective mind the entire region was completely liberated in 1944, but this was only for a period of three weeks. There was still hard fighting during the winter and complete liberation was not achieved until may 1945.

YouTube video: Operation Market Garden

The special event

From September 13 to 19 a special event station will be operating in the Nijmegen region of the Netherlands commemorating 8Ø years of freedom. The callsign is PA8ØOMG.

During 7 days they will activate the callsign PA8ØOMG and work amateur radio operators across the world. If you find yourself in the vicinity of Groesbeek and Nijmegen, be sure to visit us throughout the activities of the special event station. We are situated at one of the exact landing grounds of the 82nd Airborne division in 1944. Our website https://radioclublimburg.nl/pa80omg/index.html

~

This livestream recording is from September 1, 2024 – the NW7US Radio Communications Channel Livestream.  We do this livestream every Sunday at 21:15 UTC.  Here is the link to the livestream from this past Sunday:

The livestream list is here:

https://www.youtube.com/@nw7us/streams

I hope to see you in our livestream live chat, during the next session on Sunday, at 21:15 UTC.  See you there!

In the classic educational film titled “Electronics at Work,” produced by Westinghouse in 1943, viewers are introduced to the fascinating world of vacuum tubes. This film highlights the crucial role these devices played in both military and commercial sectors, including radio telecommunications, radar, and various industrial applications. The narrative suggests that vacuum tubes provided the United States with a significant advantage during World War II, particularly in enhancing communication and technology.

The Continuing Relevance of Vacuum Tubes

Despite advances in technology, vacuum tubes remain in use today for several applications, including:

– Transmitting radios
– Medical devices
– Audio amplification systems
– High-frequency applications

Understanding Vacuum Tubes

The film outlines the six basic functions of electronic tubes and illustrates how each type is employed in different industrial and military contexts.

[embedyt] https://www.youtube.com/watch?v=ZJ6rN7WEjbc[/embedyt]

Structure of a Vacuum Tube

A vacuum tube typically consists of two or more electrodes housed within a vacuum inside an airtight enclosure. Key features include:

– Electrode Types: Most vacuum tubes have glass envelopes, although some utilize ceramic or metal casings with insulating bases.

– Leads and Sockets: The electrodes connect to leads that pass through the envelope via an airtight seal. These leads often take the form of pins, allowing for easy replacement in a tube socket, as tubes were a common point of failure in electronic devices.

– Capacitive Design: Some tubes feature a top cap on the electrode to minimize interelectrode capacitance, enhancing high-frequency performance and maintaining safety by separating high voltages.

The Evolution of Vacuum Tubes

The earliest vacuum tubes emerged from incandescent light bulbs, which contained a heated filament sealed in an evacuated glass envelope. When heated, the filament releases electrons into the vacuum through a process known as thermionic emission.

– Electrode Functionality: A second electrode, known as the anode or plate, attracts these electrons if it holds a more positive voltage. This mechanism results in a flow of electrons from the filament (cathode) to the plate, creating an electric field due to the potential difference between them.

– Diode Function: A vacuum tube with two electrodes is termed a diode, which functions as a rectifier. Diodes allow current to flow in only one direction, converting alternating current (AC) into pulsating direct current (DC). This technology is widely used in DC power supplies and in demodulating amplitude-modulated (AM) radio signals.

Film Availability and Production Details

This film is available in the public domain under Creative Commons, and it can be accessed through the Library of Congress Prelinger Archives. The film has been edited and converted to HD quality for better viewing. Introductory and closing music is provided by Nero 10, with commercial use rights granted.

This film not only serves as an educational tool but also highlights the enduring legacy of vacuum tube technology in the realm of electronics, illustrating its significant contributions to both past and present technological advancements.

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Amateur Radio Fun in the Colorado Mountains
August 2 through 5, 2024
www.ham14er.org

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