Miles Per Watt - 10M Beacon

I enjoy working QRP and, usually, run 5 watts when working CW or SSB. Sometimes, I get grumpy and turn my power down as low as I can to 792 mW on my ICOM 7300. I figure, if they cannot hear me, they need a better antenna. HI HI

There are 1000 Mile Per Watt awards that are offered to Hams that work stations on low power. I have a paper certificate around here - somewhere. I have learned that 1000 miles per watt is Child's Play. As this article shows, there are two ways to reach out and touch someone with less. Turn your power down and you will see. 

Fig. 1, Typical 1000 Miles/Watt Award

The better your antenna, the better your chances. It has been said, "If you have $100 to spend on your hobby, put $90 into your antenna, $9 into your receiver, and $1 into your transmitter.

Recently, I setup a CW 10 M beacon on 28.2365 MHz. It drives a 20 M Vertical tuned to 10 M and is on-air during daylight hours when I am not using the rig. I have been running it at about 5 watts (QRP) with decent results. This morning, I decided to get bold and drop the power as low as I can go with my ICOM 7300 rig. It turns out that the lowest I can go is 792 mW or +29 dBm. I can get lower but I would have to put an attenuator inline. That is 8 dBm below 5 watts.

Fig. 1, ICOM-7300 Banging My 20 M Vertical

I turned the ICOM loose and let it bang away at my 20 M Vertical antenna tuned for 10 M. I was pleased with the initial results reported by the Reverse Beacon Network ⁽³⁾. Figure 2 and 3 show some typical results for my beacon operating at 792 mW.

Fig. 2, RBN Map of Contacts @ 792 mW

Fig. 3, RBN Report, Miles Per Watt

At 5 watts, I routinely see KH6LC in KEAAU, HI Keaau, HI. I just started this experiment today so time will tell if I can reach that far.  That is 2914 miles and would be 3679 miles/watt.

Another opportunity to test propagation is reports sent in on the [Beacon] email group. I've seen my call sign in reports from Germany (at 5 W). Again, time will tell.

Stay Tuned!

References:

1. https://www.naqcc.info/awards_1000mpwswa.html
   
2. https://www.skccgroup.com/operating_awards/qrp_mpw/
   
3. RBN - W7YV/B Filter
   

Review of an "RF Signal Generator"

I needed an RF Signal Generator for testing radios. They can be expensive. I found the one described in this article on Amazon for $104 including tax. It arrived today and, given my initial mixed reaction, I thought I would offer this review.

Unboxing

It came in a well-taped tightly wrapped box with no documentation to be seen anywhere. Lots of bubble-wrap but no docs. The product photo is shown in Figure 1. Other than the front panel, there are no inputs or outputs on any side.

Fig 1., Signal Generator, Front View

Having no documentation, I searched for a manual. I found a couple but they did not explain the functions. Figure 2 is a useful YouTube video that turned the light on for me, at least so far as my uses are concerned.

Fig 2, YouTube Video, OM0ET

I won't detail instructions herein - do your own research. F1 is your Go To button.

Testing with ICOM 7300

The author of the video, OM9ET Paul, Slovak Republic, demonstrated using the product to test sensitivity of an HF radio in the 20 M band. I did the same test using my ICOM 7300 and got the same result. This pleased me because, now, I know my ICOM is functioning well - at least on 20 M.

When I get time, I'll use it to evaluate some of my other receivers.

Bottom Line

Well, for the money, it works. Looks ugly, but works.

Common Mode Currents

 I was explaining to a fellow ham the other day about the need for baluns in the shack. For my purposes, I have a balun on my antennas that are naturally unbalanced. For example, feeding a dipole directly with a coax creates an unbalanced condition.

This causes common mode currents to flow on the outside of the coax feed line. This causes the coax shield to radiate into space - most commonly, into your neighbors stereo system.

To my surprise and delight, I ran across a YouTube video published by Gregg Messenger - VE6WO where he shows how common mode currents can occur on a feedline.

How To Build A Terrible Antenna!
Common Mode Current Experiments

Noise Sources in the Shack

Efforts to hear weak signals are hampered by noise. Most often, noise outside of the home cannot be mitigated. However, noise on your own property can often be eliminated. The purpose of this post is to document my Noisy Fox Hunting efforts.

04/4/2025 Broadband noise on 10 M

For some time, I've been seeing a band of noise wandering through my spectrum display on 10 M. I finally took time to track it down. My shack has switched outlets, one on the north and one one the south. These are controlled by voice commands. This is cool because I can say, "Hey, Google, turn radio shack off." The outlets are on the north and south wall. The north wall is where all the ham gear is. When I turn the north side off, everything goes down except the radio and the computer.

When I turned the north side off, the noise you see in the display went away. I traced it to my main ASUS display. It turns out that, when the screen is active, the noise is present. If the screen goes dark, via a power down or screen saver timeout, the noise goes away. So, at least I know what it is! I don't know if the noise is from radiation from the active display but I suspect that is the case.

I have another ASUS monitor mounted above that, so far as I know, does not exhibit this problem.

Problems like this are Buying Opportunities to upgrade to a larger monitor. The monitor size is you shack is a function of your age.

03/25/2025 Broadband noise on 20 M

For a day or so, there has been a broadband noise on 20 M and other bands. I finally took my QODOSEN DX-286 around the house. I could hear the noise throughout the house so I went outside on my rear deck. The noise decreased. As I approached the back door of the garage, it increased.

Fig 1. QODOSEN DX-286

Wandering around in the shop, the noise increased as I approached a power strip on my bench. When the strip was turned off, the noise I was hearing on the AM radio at 14012 KHz went away. Figure 3 shows the noise with  the strip on. Figure 4 shows the ICOM display with the strip OFF.

Fig 2. The Dirty Power Strip in the Shop

Fig 3. Noise on 20M Band - Power Strip ON

Fig 4. Noise on 20M Band - Power Strip OFF

Conclusion

In Figure 3 and 4, the frequency display spanned 80 KHz. In Figure 4, when I reduced the span to 16 KHz, the remaining noise was spread out enough that it could not be seen. It appeared to be a modulated signal. It is steady frequency-controlled. Noise from USB sources is not frequency stable.

The literature suggests that power strips with built-USB ports are known to generate noise. Given that evidence, I intend to search my entire house for noisy USB supplies and devices. The hunt continues.

References:

1. https://www.perplexity.ai/search/cfcdda66-337a-4355-b018-625c37e8f32a
   
2. https://kl7aa.org/usb-interference-fun-on-hf/
   
3. https://www.arrl.org/power-line-noise
   
4. ARRL, "The ARRL RFI Book," First Edition, Edited by Ed Hare W1RFI, c1998

03/25/2025 Broadband noise on 20M (Douk Audio ST-01/ ST-01 PRO)

Stay Tuned!

Why is coaxial cable most often 50 ohms.

 I was studying an ancient book, "Transmission Lines Antennas and Wave Guides." In the first chapter, it derived the impedance that represented the lowest loss. This was 77 ohms. I asked Perplexity.ai why we use 50 ohms. The answer is below:

Question:
Coaxial cable often has a characteristic impedance of 50 ohms. However, literature states that the lowest loss is cable having an impedance of 77 ohms. Explain why we have most cables at 50 ohms. What are the reasons behind this?

Answer:
The prevalence of 50 ohm coaxial cables in many applications can be attributed to several key factors, despite the fact that a 77 ohm impedance offers the lowest signal loss. Here are the main reasons why 50 ohms became the standard:

Compromise Between Power Handling and Signal Loss

1. Maximum Power Handling: The highest power handling capacity is achieved with a characteristic impedance of about 30 ohms. This is because lower impedance allows more current to flow, which is beneficial for high-power applications 1 2.

2. Minimum Signal Loss: The lowest signal attenuation is achieved with an impedance of approximately 77 ohms. This is due to the optimal ratio of the inner to outer conductor diameters, which minimizes energy dissipation in the cable 1 2.

3. Compromise: Since no single impedance can optimize both power handling and signal loss simultaneously, 50 ohms emerged as a practical compromise. It offers a balance between these two competing requirements, making it suitable for a wide range of applications 1 2 3.

Practical Considerations and Industry Standards

1. Manufacturing and Design: The choice of 50 ohms also reflects practical considerations in manufacturing and design. It allows for efficient use of materials and is compatible with a variety of dielectric materials, such as polyethylene, which is commonly used in coaxial cables 2 4.

2. Industry Standardization: Over time, the telecom and RF industries have standardized on 50 ohms for many applications, including microwave transmitters and two-way radios. This standardization facilitates interoperability and simplifies system design 6 7.

3. Impedance Matching: In RF systems, impedance matching is crucial for efficient signal transmission. Using 50 ohm cables ensures that devices and components can be easily matched to this standard impedance, minimizing signal reflections and losses 5.

Historical Development

The adoption of 50 ohms as a standard dates back to the early days of the telecom industry, when engineers sought to balance power handling, voltage capacity, and signal loss in coaxial cables used for radio transmitters 37. While other impedances like 75 ohms are used in specific applications (e.g., television and microwave cables), 50 ohms has become the default for many RF and high-frequency applications due to its versatility and the widespread availability of compatible components 4 6.

Citations:

1. https://cablesondemand.com/blog/whats-the-difference-between-50-ohm-and-75-ohm-coaxial-cable/
2. https://www.shure.com/en-us/insights/all-about-wireless-transmission-lines-part-i/
3. https://www.linkedin.com/pulse/mystery-behind-50%CF%89-impedance-supantha-sen
4. https://www.thebdr.net/why-is-50-ohms-the-standard/
5. https://www.wanmatianyi.com/news/understanding-the-importance-of-50-ohm-braiding-in-coaxial-cables.html
6. https://resources.pcb.cadence.com/blog/2022-using-standard-50-ohm-coaxial-cables-for-high-power-and-voltage-transfer
7. https://resources.altium.com/p/mysterious-50-ohm-impedance-where-it-came-and-why-we-use-it
8. https://www.data-alliance.net/blog/bnc-cables-50-ohm-75-ohm-distinctions-applications-connectors
9. https://www.microwaves101.com/encyclopedias/why-fifty-ohms
10. https://www.belden.com/products/cable/coax-triax-cable/50-ohm-coax-cable
11. https://ham.stackexchange.com/questions/1291/understanding-coax-impedance
12. https://ham.stackexchange.com/questions/14765/why-are-there-so-many-coaxial-cable-impedances
13. https://www.highfrequencyelectronics.com/Jun07/HFE0607_Editorial.pdf

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Answer from Perplexity: pplx.ai/share

Introduction

 This site documents my activities in the hobby of Amateur Radio. It is intended for a wide audience, not only for hams, but also, for those that might want get into the hobby.

I was licensed on 1/17/2006, right after Hurricane Katrina. My original call was KE7FMN. Once I obtained my Extra, I was granted the vanity call of W7YV.

My favorite mode is CW and I love QRP. I always say, "If they cannot hear me, they need a better antenna."

10M and Geomagnetic Storms

 

My efforts to document 10 M propagation are listed in this post.

03/14/25 0530Z

Another day of a geomagnetic storm. As of 0000Z, the Kp index has advanced to 6 from 5. This does not bode well for 10 M. See https://www.spaceweatherlive.com/en/auroral-activity/kp-index.html for current conditions.

03/13/25 0239Z

Today, the Kp index is 5, my 10 M band goes quiet. This is a G1 Geomagnetic storm. I have a beacon located at DN40ap. Through this day, the only responses have been from HI and Costa Rica. The Reverse Beacon Network indicates little activity in the northeast of the US. Very few signals across the band. The only signal I hear is a beacon only 5 miles from me. I expect that is ground wave. So it seems the ionosphere is not propagating my signals. Is this due to absorption or to the 10 M signals simply going through and not being reflected. Explain this.

Perplexity's Answer

When the Kp index is 5, indicating a G1 geomagnetic storm, it can significantly affect radio propagation, particularly on the 10-meter band. The lack of activity you're observing is likely due to a combination of absorption and altered ionospheric conditions.

1. : During geomagnetic storms, the ionosphere's lower layers, especially the D-layer, become more ionized. This increased ionization leads to higher absorption of radio signals, particularly those in the HF range, including the 10-meter band. Signals may be absorbed rather than reflected back to Earth, reducing their propagation distance and effectiveness 45.

2. : The ionosphere's ability to reflect radio signals is also affected. Normally, the ionosphere acts as a mirror for HF signals, allowing them to bounce back to Earth. However, during geomagnetic storms, the ionosphere's structure and density can change, potentially reducing its reflectivity. This means that signals might pass through the ionosphere without being reflected back, leading to poor propagation 57.

• : The 10-meter band typically performs well during daylight hours due to the ionosphere's increased reflectivity. However, during geomagnetic storms, this reflectivity can be disrupted, leading to poor propagation even during the day 7.

• : The fact that you can hear a beacon only 5 miles away suggests that ground wave propagation is working, as it does not rely on ionospheric reflection. Ground waves propagate along the Earth's surface and are less affected by ionospheric conditions 6.

• The lack of responses from the northeast US and the limited activity on the Reverse Beacon Network indicate that the geomagnetic storm is affecting propagation across a wide area. The signals you received from HI and Costa Rica might be due to specific ionospheric conditions or paths that were less affected by the storm.

In summary, the quietness on the 10-meter band during a G1 geomagnetic storm is likely due to both increased absorption and reduced reflection of signals by the ionosphere. Ground wave propagation remains effective for local signals but does not help with long-distance communication.

Citations:

1. https://www.spaceweatherlive.com/en/help/the-kp-index.html
2. https://mavicpilots.com/threads/kp-index-5-33.145952/
3. https://ham.stackexchange.com/questions/1225/what-are-the-general-effects-of-a-geomagnetic-storm-on-propagation
4. https://www.zl2al.com/1377/propagation-primer-101/
5. https://www.taitcommunications.com/en/about-us/news/geomagnetic-storm-impacts-radio-communications-power-grids
6. https://vu2nsb.com/radio-propagation/ground-wave-propagation/surface-wave-propagation/
7. https://strykerradios.com/10-meter-radio/introduction-to-10-meter-band/
8. https://www.swpc.noaa.gov/products/planetary-k-index
9. https://www.pa9x.com/propagation/
10. https://www.reddit.com/r/HamRadio/comments/11zmioe/i_never_hear_local_10m_stations_its_always_from/
11. https://en.wikipedia.org/wiki/10-meter_band
12. https://watchers.news/2024/12/17/cme-impacts-earth-geomagnetic-storm-december-17-2024/
13. https://www.swpc.noaa.gov/noaa-scales-explanation
14. https://3fs.net.au/making-sense-of-solar-indices/
15. https://www.reddit.com/r/amateurradio/comments/1co2eg4/solar_flares_and_hf_propagation/
16. https://en.wikipedia.org/wiki/K-index
17. https://forum.dji.com/thread-203507-1-1.html
18. https://www.swpc.noaa.gov/phenomena/geomagnetic-storms
19. https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2020SW002641
20. https://www.swpc.noaa.gov/content/tips-viewing-aurora
21. https://thehill.com/homenews/nexstar_media_wire/4552740-severe-geomagnetic-storm-conditions-impacting-earth-noaa-says-what-to-know/
22. https://www.arrl.org/news/propagation-update
23. https://yuneecpilots.com/threads/just-how-important-is-the-kp-index.3954/
24. https://www.swpc.noaa.gov/phenomena/solar-flares-radio-blackouts
25. https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2020JA028261
26. http://forums.radioreference.com/threads/x-class-solar-flare-10-28.433711/
27. https://en.wikipedia.org/wiki/Geomagnetic_storm
28. https://www.radioddity.com/blogs/all/how-meteorology-shapes-hf-radio
29. https://austinhams.org/solarwxintro/
30. https://www.sws.bom.gov.au/Educational/1/2/5
31. https://hamstudy.org/browse/E3_2019/G3A
32. https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2023SW003500
33. https://reflector.sota.org.uk/t/geomagnetic-storm-g4/35293
34. https://www.okdxf.eu/files/NM7M_HF_Propagation_tutorial.pdf
35. http://forums.radioreference.com/threads/hf-lf-propagation-question.464386/
36. https://www.youtube.com/watch?v=yD92cmm-3kQ
37. https://resources.pcb.cadence.com/blog/2023-understanding-rf-propagation-types-and-properties
38. https://www.boldmethod.com/learn-to-fly/navigation/shoreline-effect/
39. https://www.reddit.com/r/amateurradio/comments/r6fyk0/question_about_10m_propagation_in_poor_conditions/
40. https://en.wikipedia.org/wiki/Ground_wave
41. https://chieftain.training/radio-propagation/
42. https://ham.stackexchange.com/questions/22708/a-first-homebrew-design-band-antenna-and-ground-wave-propagation
43. https://groups.google.com/g/rec.radio.amateur.antenna/c/sqn1ay7YU84
44. https://en.wikipedia.org/wiki/Radio_propagation
45. https://www.qsl.net/wj5o/10meterband.htm
46. http://www.wa2ooo.com/propagation.html
47. https://gbarc.ca/Week%203%20-%20Chapter%206%20-%20Propagation.pdf
48. https://www.droneacademy.com/what-is-kp-index/
49. https://clouglobal.com/navigating-the-storm-understanding-geomagnetic-storms-and-their-impact-on-the-power-grid/
50. https://www.swsc-journal.org/articles/swsc/pdf/2012/01/swsc120026.pdf
51. https://www.d1store.com.au/lounge/content/what-do-kp-numbers-mean-how-does-it-affect-drone-flying
52. https://www.nature.com/articles/s41598-023-45900-y
53. https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2024.1462160/full
54. https://moonrakeronline.com/us/blog/when-solar-storms-strike-how-hams-ride-the-ionospheric-rollercoaster
55. https://www.swpc.noaa.gov/content/global-d-region-absorption-prediction-documentation
56. https://hamstudy.org/browse/CA_B_2014/L11
57. https://peer.asee.org/the-d-and-f-ionosphere-layers-why-are-am-broadcast-signals-mostly-local.pdf
58. https://ham.stackexchange.com/questions/17260/sanity-check-should-i-be-able-to-hear-this-20m-beacon

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Answer from Perplexity: https://www.perplexity.ai/search/today-the-kp-index-is-5-my-10-8_4QSa61Raezd7F9ttnH6w?utm_source=copy_output

Shack Battery Power

• Introduction
• Astron RS-20A Power Supply
• Battery Source
• RIGRunner 4007U
• Super PWRgate PG40S
• Automatic Shutdown

Introduction

This articles describes my shack power supplies. The shack operates from AC Mains unless there is a power outage or the 12 VDC Charger is turned off at night. Sometimes, I run beacons through the night and, if the charger is off, I have experienced shutdown of the beacons due to low battery voltage.

Astron RS-20A Power Supply

This supply provides 16 Amps continuous duty with ICS of 20 Amps. Fuse is a GMC 5A. Line draw: idle 215 mA, full load 3.4 Amps

Row 2, Column 1	Row 2, Column 2

Battery Source

Interstate Batteries 12V 75Ah Deep Cycle Mobility Battery Group 24 VRLA SLA AGM (Insert Terminal) 

RIGRunner 4007U

RIGrunner 4007U

Super PWRgate PG40S

Super PWRgate PG40S

Automatic Shutdown

The RIGRunner has an automatic over or under voltage feature. High Trip is 15 VDC and Low Trip is 11.0 VDC. With both rigs running a beacon at night on battery power only, the battery voltage can drop below 11.0 VDC. This sets of the Low Trip feature and takes the beacons down. 

I had forgotten about this feature so I was initially perplexed to discover the figs had gone off air overnight.

Have pulled the trigger on a logging bench meter. Life is good.

Exploring the Digital Weed Patch

Amateur radio is hobby with many layers, like a large onion. Repeaters on one patch, HF on another, antennas another. At each point, you can burrow in deep and deeper like a worm - discovering ever more fascinating layers.

There is a patch on the onion that I will characterize as the Digital Weed Patch. Amidst that patch are many digital modes of amateur radio. Some are very useful, some are a "flash in the pan." Some are completely useless. My opinion of these various modes will certainly differ from yours in many respects.

The modes are too numerous to list here. And, the means to implement them are even more numerous.

I have a friend who, just the other day, was able to get Ham Radio Deluxe implemented on his ICOM 756 Pro. He is, also, looking to implement FLDigi. He will be successful, I am sure. He is a new ham and I am proud of his accomplishments. He may burrow even deeper into the digital modes and try WSPR. A mode that takes minutes to send a single sentence. How fun! Sure, if you like sending email at a snails pace.

Some years ago, I was well-practiced with many of these software packages and have many QSL cards to attest to my skills.

As time passed, however, I abandoned all digital modes with the exception of one. Morse Code, the original "Digital Mode" was invented in 1844 and was the basis for the successful telegraph system. This evolved into radiotelegraphy. I like to think of it as the original Meat Computer Mode.

There are many software programs that can decode Morse Code very effectively.

But, what if there were no computers! What if "The Big One" hits? No more computers. No more electricity, no more Walmart, no more gasoline. No more Windows Updates from Microsoft. A dim, dark world, to be sure. Morse code is the one digital mode that is always there. The original "meat computer," if properly trained, can send Morse Code to the cave across that canyon using a campfire or flashlight (can't get new batteries at Walmart). How many of us can say we can do that? Not "could," but "can and have?"

So, who haunts the Digital Weed Patch? It is those nerds that know how to use these digital modes when needed. The original version of this person was Samuel Morse - a truly Silent Key that invented it all.

3900 Saturdays

I purloined this story from the Internet. It has been a project of mine for 20 years. The other day, I turned 75 and took the last penny out of my box. I used pennies - marbles are expensive. In any case, this was a 20 year project for me. Having pulled the last penny from the box, I can crow about still being alive. I've put 262 pennies back in the box. That will take me to my 80th birthday in 2030. Enjoy the story. I certainly have.

------------------------------

The older I get, the more I enjoy Saturday mornings. Perhaps it’s the quiet solitude that comes with being the first to rise, or maybe it’s the unbounded joy of not having to be at work. Either way, the first few hours of a Saturday morning are most enjoyable.

A few weeks ago, I was shuffling toward the garage with a steaming cup of coffee in one hand and the morning paper in the other. What began as a typical Saturday morning turned into one of those lessons that life seems to hand you from time to time. Let me tell you about it:

I turned the dial up into the phone portion of the band on my ham radio in order to listen to a Saturday morning swap net. Along the way, I came across an older sounding chap, with a tremendous signal and a golden voice. You know the kind; he sounded like he should be in the broadcasting business. He was telling whomever he was talking with something about “a thousand marbles.” I was intrigued and stopped to listen to what he had to say

“Well, Tom, it sure sounds like you’re busy with your job. I’m sure they pay you well, but it’s a shame you have to be away from home and your family so much. Hard to believe a young fellow should have to work sixty or seventy hours a week to make ends meet. It’s too bad you missed your daughter’s “dance recital” he continued. “Let me t ell you something that has helped me keep my own priorities.” And that’s when he began to explain his theory of a “thousand marbles.”

“You see, I sat down one day and did a little arithmetic. The average person lives about seventy-five years. I know, some live more and some live less, but on average, folks live about seventy-five years. Now then, I multiplied 75 times 52 and I came up with 3900, which is the number of Saturdays that the average person has in their entire lifetime. Now, stick with me, Tom, I’m getting to the important part”.

“It took me until I was fifty-five years old to think about all this in any detail”, he went on, “and by that time I had lived through over twenty-eight hundred Saturdays. I got to thinking that if I lived to be seventy-five, I only had about a thousand of them left to enjoy. So I went to a toy store and bought every single marble they had. I ended up having to visit three toy stores to round up 1000 marbles. I took them home and put them inside a large, clear plastic container right here in the shack next to my gear.”

“Every Saturday since then, I have taken one marble out and thrown it away.

I found that by watching the marbles diminish, I focused more on the really important things in life.”

“There is nothing like watching your time here on this earth run out to help get your priorities straight.”

“Now let me tell you one last thing before I sign-off with you and take my lovely wife out for breakfast. This morning, I took the very last marble out of the container. I figure that if I make it until next Saturday then I have been given a little extra time. And the one thing we can all use is a little more time.”

“It was nice to meet you, Tom. I hope you spend more time with your family, and I hope to meet you again here on the band. This is a 75 Year old Man, K9NZQ, clear and going QRT, good morning!”

You could have heard a pin drop on the band when this fellow signed off. I guess he gave us all a lot to think about. I had planned to work on the antenna that morning, and then I was going to meet up with a few hams to work on the next club newsletter.

Instead, I went upstairs and woke my wife up with a kiss. “C’mon honey, I’m taking you and the kids to breakfast.” “What brought this on?” she asked with a smile. “Oh, nothing special, it’s just been a long time since we spent a Saturday together with the kids. And hey, can we stop at a toy store while we’re out? I need to buy some marbles.”

Running A Beacon During Idle Time

• Introduction
• Beacon List
• Beacon Station
• If You Hear Me
• Activity Log

Introduction

I was playing radio the other day and copied a 10 metre beacon on 28.1995Mhz.  I copied VVV VE3IIM/B EN94 73.  Super strong, no QRM and nil QRN. 599. S Meter S1 to S3. I looked him up on QRZ (Tim Smith, Hanover, ON N4N 2R5 Canada) and responded to his request for reception reports. 

He responded and we had a nice email chat. Tim was very helpful and gave me some useful research links. 

This gave me the idea of running my own beacon using my ICOM 7300 memory keyer capability. I setup a memory of VVV DE W7YV/B W7YV/B DN40 K with a 4 second repeat interval.

I am sending this on 10M or 20M. Have not tried 40 or 80, yet, due to antenna issues.

The results are intriguing. I was contacted by Jerry, AC5JM, the IARU Region 2 HF Beacon Coordinator informing me that I was not using a coordinated frequency. He provided a list of "clear channel" beacon frequencies and I chose 28.2365 MHz for my 10M beacon frequency. 

Tim gave me another idea. Last week his 10m beacon was heard by ZL7DX Chatham Island, east of New Zealand. He went to the online receivers, found one down that way, and listened live to his beacon. He said it was lots of fun checking on this propagation..

Wideband Worldwide Shortwave Receiver Map

References:

1) https://listof10mbeacon.blogspot.com/2023/06/worldwide-list-of-10-meter-beacon.html

2) Wideband Worldwide Shortwave Receiver Map

3) List of Shortwave Beacons Worldwide

Beacon List

FCC Regulations

It was pointed out to me by Ron WB9YZU that operation of an "automated beacon" is not allowed on bands below 10M. This was a new learning experience for me. I verified this using Perplexity.ai and got quite a tongue lashing!

I had been running a beacon on 14.058 MHz during nighttime in the US. As a result of this new information, my beacons will be at 10M or higher in frequency.

The following lists the beacons I am running or plan to run. I will stick to these schedules as much as possible, however, if the rig is needed for other work, the beacons will be turned off. Hopefully, one day, I'll have a dedicated transmitter on 10M.

Band	Frequency
80 M	Not allowed
40 M	Not allowed
20 M	Not allowed
10 M	28.2365 MHz Coordinated by IARU Region 2 HF Beacon. Starts around 1200Z and ends around 0230Z. Rig is an ICOM 7300 running 5 watts into a 20M vertical that is tuned to 10M.
6 M	Pending
2 M	144.281 MHz. New implementation. Sporadic operation. ICOM 7100 running 20 W into 2M/70 cm vertical up 15 ft. Being heard by http://websdr3.sdrutah.org:8903/index1a.html, a WebSDR located near Corinne, Utah, about 80 miles (94km) north of Salt Lake City and about 14 miles (23km) east of the Golden Spike National Historic Site. The ICOM 7100 is an all-band rig and could be adapted to other beacons. The problem is the antenna!

Beacon Station

If You Hear Me

If you hear one of my beacons, please let me know by email or via comments here. My email address is available on https://www.qrz.com/db/W7YV. It is always fun to hear from others that listen to beacons. 

When I was a youngster (1958 ish), I would spend hours copying beacons in front of an old Attwater Kent shortwave radio. It was difficult due to noise and not knowing Morse Code at the time (8 years old). I sent lots of reception reports and received lots of QSL cards.

Activity Log

03/12/2025 2343Z Very poor response from the RBM to my 29.2365 MHz beacon. In 5 hours, from 1502 to 2343Z *8hr 41min), only two stations responded. HI and Costa Rica. Only 23 spots Current solar conditions are Kp 5. A G1 (Minor) geomagnetic storm levels are expected on 12 Mar due to prolonged periods of southward Bz.
See https://www.perplexity.ai/search/today-the-kp-index-is-5-my-10-8_4QSa61Raezd7F9ttnH6w#0

What Is My Favorite Band?

I don't have a favorite band. Each band serves a purpose at the right time and place.

Right now, I am mostly locked out of 80 and 40 but only due to the fact that my Skywire Loop Antenna is down. So, for now, I have a 20M vertical field antenna. See photo of the antenna being used in the field. The guy wires serve as 1/4 wave tuned radials, i.e., the "other side of the vertical". I am able to tune the antenna from 80 meters to 10 meters. On 80, I can get a signal out of the back yard but not far. Thank you, Jesus, for antenna tuners. On my antenna, I placed a 1:1 balun at the feed point - the grey box where the radials intersect. This ensures that I don't get any feedline radiation.

80 M is a great band for NVIS work. My Skywire Loop excelled at that and I usually had armchair copy out to 500 miles or better.

80M serves my CW net interests. I don't do much phone rag chew other than working Special Event Stations in 80, 40, and 20. 10M is great for DX and for working POTA, SOTA, and stuff like that.

I also have a 6M dipole that works well. It is homebrew and uses the metal tubes that hold shower curtains. I still have a bunch of those tubes.

I liked working 160 on my loop. If you have a good tuner, you can load up a range fence or your rain gutters (metal, of course).

Attachments area

Preview YouTube video Will It Antenna? Put a BALUN On A Curtain Rod, Make a Covert Ham Radio Antenna

Will It Antenna? Put a BALUN On A Curtain Rod, Make a Covert Ham Radio Antenna