Friday, April 23, 2021
Weak opening to South America on 28 MHz - 22nd Apr 2021
Thursday, April 22, 2021
More reception reports of the South African 40 MHz beacon in Europe - Apr 2021
Following on from my previous post about the South African 8-metre ZS6WAB beacon on 40.675 MHz being heard by SV2DCD in Greece, there are now three more reports!
IZ0BCD: Francesco, IZ0CBD in Rome, Italy report reception of the 8m ZS6WAB beacon on the 20th of April 2021.
Video...
Francesco was using a Kenwood TS2000 and a 6-element Yagi for 50 MHz and the distance was around 7500kms.
9H1TX: David, 9H1TX on the island of Malta heard the 8m beacon on the 19th of April using a 7-element Yagi for 50 MHz.
Video...
SV8CS: Spiros, SV8CS heard the South African 8m beacon also on the 19th of April 2021 using a 7-element Yagi by I0JXX.
Video clip at this link... https://raag.org/to-zs6wab-akoystike-sti-zakyntho/
Propagation Mode: As outlined in a previous post, the mode of propagation was TEP (Trans-Equatorial Propagation). As shown in the map above, both the beacon and the receiving stations are equidistant from the Geomagnetic Equator.
Links...
1) For more information on the 8-metre band, visit my 40 MHz page.
* * *
Addendum:
1st Update - 22nd Apr 2021: Info from Paulo, CT2IWW
CT7ASY: Eduardo, CT7ASY near Lisbon heard the ZS6WAB 8m beacon on the 20th of April.
CT7ASY... " My name is Eduardo Arraia and I´m an amateur radio operator licensed as CT7ASY, in Portugal, locator IM58gv.
Whilst monitoring the 8 meter band this afternoon, I came across the ZS6WAB beacon. As you can see by the attached image, I received the following message, decoded on CWSkimmer, at about 15:41 UTC, this afternoon, on 40.674MHz: TAR de ZS6WAB DE ZS6WAB DE ZS6WAB BCN LOC K R4
I am monitoring the band with an Icom IC7300 and a Sirio GPA 40-70 ground plane vertical antenna.
Until a couple of years ago, the 40MHz band was used, in Portugal, by the fire services in a country wide repeater network.
Since all emergency and police services moved to the new TETRA UHF network, this portion of spectrum was freed up and we can monitor some beacons, from Europe. South Africa is a first, though.
Cheers and 73, Eduardo, CT7ASY"
Modest opening on 28 MHz to Brazil & Europe - Wed 21st Apr 2021
Wednesday 21st April 2021: This was a pretty reasonable day on the 28 MHz band with an opening to Brazil and to Europe.
Opening to Brazil: I have a large local hill in the direction of South America so if I hear anything then it must have been a good opening. As for the propagation mode??? I think it's impossible for anyone to state definitively what it was. It could have been...
a) 100% F2 propagation from Ireland to Brazil
b) One hop Sporadic-E to the south of me and then via F2 propagation to Brazil.
c) One hop Sporadic-E to the south of me and then via TEP propagation to Brazil.
The Brazilian signals were heard between 15:00 and 19:00 UTC. It's possible it was just one of the propagation modes above, perhaps it was a combination of them at different times. That's the thing with 28 MHz, sometimes you can never be certain as so many propagation modes overlap.
Opening to Europe: There was a modest Sporadic-E opening to Europe as can be seen from the distribution of stations above.
Overall, a total of 178 stations in 19 countries were heard. The solar flux was at 80 which was slightly higher than recent weeks.
Wednesday, April 21, 2021
Good opening on 50 MHz as propagation modes overlap - 20th Apr 2021
Tuesday 20th April 2021: This was a really good day for DX on the 6-metre band with distances of 9000 to 12000 kms being worked on North-South paths.
Tuesday, April 20, 2021
Opening to Indonesia & USA on 28 MHz - Tues 20th Apr 2021
Tuesday 20th April 2021: This was an unusual day on the 28 MHz band in that it opened up to Indonesia and the USA. I haven't heard signals that far east and west in quite a while.
KW4SP 10m FT8 6319 km 13:26:29
South African 8-metre beacon on 40.675 MHz heard in Greece - 19th April 2021
Following on from the report last month of the ZS6WAB 8-metre beacon being heard in Portugal, we now have news that the beacon on 40.675 MHz has been heard in the north of Greece by SV2DCD!
In a report by email, Leonidas SV2DCD informs me that he first heard the beacon on the 19th of April 2021 at 14:00 UTC and it peaked around 15:40 UTC. Leonidas was using an 8-element Yagi for 50 MHz to listen to the beacon on 8m.
You can see a video of the reception below...
As outlined in the video title, Leonidas feels that the propagation mode was TEP (Trans-Equatorial Propagation). I have shown the Geomagnetic Equator in the map above and it seems to be roughly equidistant from both stations.
The distance was approximately 7,220 kms.
Now that we have concrete evidence of the 8m South African beacon being heard in Europe, hopefully others will try to have a listen and report it.
Analysis... This new 40 MHz beacon could prove very useful for serious 6-metre operators in Europe checking to see if there is a propagation path to South Africa. There is quite a jump from say 28 MHz to 50 MHz where as if the band is open at 40 MHz then 50 MHz may not be far behind.
Links...
Monday, April 19, 2021
Very weak Sp-E opening on 28 MHz - 19th April 2021
The Sporadic-E opening on the 19th of April 2021 was a pretty weak affair with just 22 stations in 8 countries heard on 28 MHz. It's hard to claim that the band was open for 5 days in a row as this one was so weak.
One interesting signal was R7AZ at 3660 kms. Double hop Sporadic-E or one hop F2? On 10-metres, it's sometimes impossible to tell.
BBC to close another batch of Medium Wave radio transmitters in 2021
In a posting on the 14th of April 2021, the BBC announced that they were going to close the medium wave service for ten regional stations in May & June of this year. With fewer and fewer people now listening to medium wave radio, the BBC felt that the transmitter didn't offer value for money.
"As I have written about in previous blog posts, we have been closing some Medium Wave (MW) transmitters across the UK which no longer offer sufficient value for money for licence fee payers."
"A large and increasing share of radio listening in the UK - including to the BBC - is digital, and the BBC is committed to a digital future for radio. In recent years we have made significant investment in local DAB expansion, all of our local radio stations are available on digital terrestrial TV (such as Freeview), and we have transformed our online and mobile offering with BBC Sounds."
A total of 14 medium wave transmitters will be closed down and these are shown below...
Most of them are reasonably low power with powers between 0.5 to 2 kW. The large one is the 160 kW Radio Ulster transmitter near Belfast which would have been heard all over Europe at night.
They also announced that four regional transmitters will be reducing their output power.
The current power levels are shown above as it's not yet clear what the new power level will be.
"In addition, the following stations will have reduced MW coverage:
Impacted areas including North of Snowdonia, Anglesey, Bangor, Caernarfon, Conwy, and Betws-y-Coed and Areas around Wrexham and east of Snowdonia. Still available on, FM, DAB, and online and on all TV platforms (Terrestrial, Satellite, and Cable)
Radio Gloucestershire
With areas around Stow-on-the-Wold being impacted DAB will likely be the best option for most listeners. Available on 104.7 FM around Gloucester, 95.0 FM around Stroud and 95.8 FM around Cirencester. Still available on Freeview/Youview and online (through a smart phone, computer, or smart speaker)"
The BBC announced its intention to close MW transmitters back in 2011. It's likely that more will close in the years ahead.
Link...
1) Next phase of changes to some local BBC radio Medium Wave services - Apr 2021
Another Sporadic-E opening on 28 MHz for the 4th day in a row - 18th April 2021
Sunday 18th April 2021: The 28 MHz band opened for the 4th day in a row with a modest Sporadic-E opening to the south of Spain and Scandinavia.
Most of the signals from Spain were slightly long at 1600-1700kms with nothing coming from the centre of the country.
The opening to Scandinavia was unusual in that it was the first Sporadic-E opening in that direction this year. The FT8 signals were strong enough that it prompted me to do a few scans and I heard two beacons.
EI7GL 28237.4 LA5TEN/B 12:25 18 Apr IO51TU<ES>JO59JP Norway
The LA5TEN beacon near Oslo is also probably one of the most consistent signals that I hear from Scandinavia so it was no real suprise to hear it first.
Sunday, April 18, 2021
Did a VHF APRS signal cross the North Atlantic on the 17th of Apr 2021? (Spoiler-Probably not)
The Ham Radio Concepts Facebook page put this image up on Saturday the 17th of April with the comment... 'Wow! Is this a computer glitch? A transcontinental band opening on VHF?'
I've edited the image to remove the parts of the map which aren't of interest and left the important parts.
The Facebook post was put up around 17:00 UTC on Saturday the 17th of April. Other than that, we don't have any other info to go on.
Who? What? Where? When?... Other than the time stamp on the image which may not be UTC, we have no other info. Was it a 144 MHz FM APRS signal? What was heard? Who heard it? When was it heard? Is it even real?
I looked at the mennolink website but couldn't really get any further. I'm posting it here so that others can investigate if they want to.
I looked at the F5LEN tropo forecast website and it does show some enhancement in the Atlantic for large parts of the path but that in itself proves nothing.
Until such time as there is some actual real data, I'd be inclined to write it off as a non-event.
Links...
Modest Sporadic-E on 28 MHz for the 3rd day in a row - 17th April 2021
Saturday the 17th of April 2021 was the third day in a row where there was a modest Sporadic-E opening on 28 MHz. The main Sp-E opening was again to the Iberian Peninsula with some F2 propagation as well to South Africa, St Helena and South America.
According to the PSK Reporter website, I heard 108 stations in 20 countries.
I think it's safe to say that the Summer Sporadic-E season for the Northern Hemisphere has started.
Saturday, April 17, 2021
That 3000km opening to the Azores on 144 MHz that didn't happen
This is a story about why you should be very careful taking unusual VHF propagation reports at face value. Someone sent me an email to say that the PSK Reporter website had shown the reception report of CU3HN in the Azore Islands by a Dutch radio amateur on 144 MHz.
At first glance, this looked like an incredible 2m reception report with a distance of just under 3000 kms. I checked the PSK Reporter website myself this morning and it said that four stations had heard CU3HN on 144 MHz!
G8ECI 2m FT8 2635 km 22:21:44
PA3GNZ 2m FT8 2898 km 22:21:30
PA2CV 2m FT8 2969 km 22:09:15
DF8JO 2m FT8 3016 km 22:21:44
I then checked the tropo forecast from the website of Pascal, F5LEN. While there was a sign of some conditions near the Azores, it looked poor at the eastern end of the path near the Netherlands and Germany.
I then checked the PSK Reporter website to see what bands CU3HN was on by using 'All' instead of '2m' and it shows a lot of reports for 14 MHz (20m) late last night.
I sent Fábio, CU3HN an email this morning and he confirmed that he was NOT on 144 MHz last night.
So what was going on??? ...I can think of two possible reasons.
1) Someone near the Netherlands was pirating CU3HN's callsign and locator and transmitting on FT8 on 144 MHz. Maybe it's possible but I would have expected more stations to hear and report the bogus signal if that was the case.
2) Some sort of glitch in the PSK Reporter website where CU3HN was reported on the wrong band? The thing here is that some of the receive stations listed above were not reporting 20m at any stage.
I'm not 100% sure how it happened but it goes to show that you always need to be careful and question any reception report that looks out of the ordinary.
Update: See suggestion below from Kees, PA3GHQ which might be the best explanation.
"I had the same problem 2 months ago. I saw calls from Belarus, Saudi Arabia, Turkey and later from Canada on 2 mtr. After some investigation the issue was on the same time when an amateur from my region calls on 2 mtr in FT8. I’ve called him by phone and we did some tests. The issue was the audio from his 40 mtr transceiver was receiving FT8 and the audio mixed with his FT8 modulation signal when his 2 mtr transceiver was transmitting. Both radio’s worked via 1 computer and when he turned the HF radio off the problem was solved. ...Best regards/ 73 Kees PA3GHQ "
Another opening on 28 MHz - Fri 16th April 2021
The 16th of April 2021 was another reasonable day on 28 MHz with 86 FT8 reports from 20 countries. There was a bit more Sporadic-E compared to the 15th with stations from plenty of German stations making an appearance in contrast to yesterday.
I also managed to hear two beacons on the band... one from Madrid and one from Gibraltar.
EI7GL 28251.0 ED4YAK/B 13:58 16 Apr IO51TU<ES>IN80FK
That was my first time hearing those two beacons this year. I also heard EA8DHV on CW who was a reasonably strong signal ~559.
EI7GL 28016.0 EA8DHV 17:22 16 Apr IO51TU<>IL18UL Canary Islands
I'm not sure what the propagation mode was for the EA8 station. It's too far for one hop Sporadic-E so it either involved more than one hop OR it was from the F2 layer. That's the thing about 10-metres, sometimes you can never be 100% sure what the mode of propagation is.
Friday, April 16, 2021
VO1FN 144 MHz Trans-Atlantic Project mentioned on Radio DARC broadcast on the Short Wave Band
Radio DARC is a short program broadcast on 6.070 KHz with 100 KW on Sundays at 09:00 UTC (11:00 CEST) about amateur radio with a lot of music.
On Sunday the 18th of April 2021, the VO1FN Trans-Atlantic project on 144 MHz gets a mention in their news items at about 10 minutes in.
While the program is broadcast in German, it does raise awareness about the 'VO1FN Trans-Atlantik Projekt' among a much wider community.
Radio DARC broadcast locally via FM and DAB in Germany, Austria and Italy. It is also broadcast on 3955 kHz and 9670 kHz for an audience outside of Germany. If you hear the broadcast then you can send them a reception report.
You can find out more about Radio DARC and their transmission times here... https://www.darc.de/nachrichten/radio-darc/
More information about the VO1FN Trans-Atlantic Project can be found in this previous blog post.
Thanks to Joerg, DM4DL for the above information.
Reasonable Sporadic-E opening on 28 MHz - 15th April 2021
The 15th of April 2021 was a reasonably modest day on 28 MHz with a Sporadic-E opening to the Iberian peninsula, some F2 propagation to Greece, Turkey & Israel and some F2 propagation to South Africa and South America.
If we were relying on CW beacons to tell us the band was open then we would miss most of the weak openings. Whatever some people think about the FT8 digital mode, it is a fantastic propagation tool.
The Solar Flux on the 15th was down at 74 which is very low for F2 propagation on 10-metres.
The opening to Spain and Portugal is a sure sign that we are approaching the Summer Sporadic-E season which usually starts near the end of April every year. The openings will come in fits and starts but they will get more numerous and stronger as the weeks pass.
Thursday, April 15, 2021
New Android App for decoding DRM digital radio broadcasts
On the 13th of April 2021, a company named StarWaves announced the release of a new Android app called DRM SoftRadio. The app allows a user of a Software Defined Radio (SDR) to listen to any DRM digital broadcasts on an Android smartphone or tablet.
DRM or Digital Radio Mondiale is the global digital radio standard used for digital transmissions on medium wave and short wave in several countries.
Some of the features...
Languages: English, German, Simplified Chinese
Convenient frequency tuning and DRM Service selection
Journaline, DRM’s advanced text application, allows to interactively browse through latest news, sports and weather updates, programme background information and schedules, distance learning/RadioSchooling text books, travel information, and much more
Free tuning to any DRM broadcast frequency
Supports all DRM frequency bands – from the former AM bands (LW/MW/SW) to the VHF bands (including the FM band), depending only on RF dongle functionality
Graphical spectrum view to check the signal on the tuned frequency
For live reception, an SDR RF dongle must be connected to the device’s USB port (with USB host functionality). The following SDR RF dongle families are currently supported, along with a range of specifically tested models:
Supported SDR receivers...
SDRplay family: SDRPlay RSP1A, SDRPlay RSPdx, SDRPlay RSPduo, SDRPlay RSP1, SDRPlay RSP2, SDRPlay RSP2pro, MSI.SDR Panadapter (Note: SDRPlay family support on Android is currently limited to the 32-bit version of this app.)
RTL-SDR family: The experimental support for RTL-SDR based RF dongles requires that you manually start the following separate tool before opening this app (on standard port ‘14423’): The app ‘SDR driver’ can be installed from the Google Play Store and other Android app stores.
Analysis... While DRM (Digital Radio Mondiale) has been around as a digital radio standard since 2003, it has proved difficult to get accepted by broadcasters and the general public. Broadcasters were unwilling to use DRM due to a lack of suitable receivers and the public weren't interested because there were a lack of DRM transmissions.
That has changed of late with the introduction of DRM transmissions in the medium wave band in India. Considering its population, it is assumed that this will kick off the development of cheaper DRM receivers.
While SDR receivers are probably used more by those interested in technology and radio rather than the general public, this new app does open up DRM transmissions to a whole new audience.
The app costs in the region of €5/$5 which is very modest for most SDR users.
It is my understanding that a Windows version is being developed by the company and this should be of interest to an even wider audience.
Links...
Opening to the South Atlantic on 28 MHz - 14th Apr 2021
ZD7JC 10m FT8 7542 km 18:31:14
IK7FPV 10m FT8 2323 km 17:51:59
IZ0GIY 10m FT8 1979 km 17:52:59
IK5BSC 10m FT8 1681 km 16:38:59
IU5LQC 10m FT8 1642 km 18:22:27
DF8XC 10m FT8 1154 km 11:43:05
MM0ABM 10m FT8 482 km 15:44:29
EI4GEB 10m FT8 79 km 19:13:14
EI8GS 10m FT8 7 km 11:47:45
Tuesday, April 13, 2021
144 MHz beacon on the US Virgin Islands to investigate 6000km TEP path to South America
The 2m NP2X beacon is now operational from St.Croix in the US Virgin Islands and its primary purpose is to investigate the TEP (Trans-Equatorial Propagation) path to South America.
The beacon is on 144.291 MHz and sends its ID in CW. It runs 100-watts into a 15-element Yagi antenna. The beam heading is 170 degrees as the primary target area is Uruguay (CX), the south of Brazil (PY) and Argentina (LU).
The beam width of a 15-element is about 30 degrees i.e. +/-15 deg. The map above shows the direction for the main beam heading as well as the -3dB points. The photo below shows the antenna and the sea path to the coast of South America.
Location: St. Croix, US Virgin Islands
Elevation: 91 metres above sea level
Transceiver: Kenwood TR-751A
Amplifier: RF Concepts 160 watt, reduced to 100 watts for beacon operation
Antenna: 15 element Yagi @ beam heading (QTH) of 170 degrees (Uruguay)
Frequency: 144.291 MHz
Monday, April 12, 2021
Weak opening to South America - 12th Apr 2021
New National Shortwave Listeners Club in Ireland
A new National Shortwave Listeners Club has been established in Ireland to help those interested in going for their amateur radio licence.
The Irish Radio Transmitter Society (IRTS) is the national society representing radio amateurs in Ireland and they are currently running very successful online courses which have generated a lot of interest.
The IRTS carried this news item last Sunday the 11th of April 2021..
National Shortwave Listeners Club.
The inaugural weekly meeting of the newly formed National Shortwave Listeners Club was held on the Zoom platform last Sunday evening and attracted 60 attendees. Online classes continue on Tuesday, Wednesday and Thursday evenings with over 100 students hoping to get licensed in the coming months. Club meetings are held on the Zoom platform every Sunday evening at 2000. Information about the new club is available on swl.ie.
There are currently about 2000 EI callsigns so having an additional 100 waiting to take the exam is very encouraging.
Like many other countries, the old model of holding physical exam classes is largely broken. By having classes online, most of the costs like room rental, insurance, printouts and traveling expenses disappear and the catchment area also changes from say a large city to the size of a country.
It's probably something that should have happened 20 years ago but the widespread acceptance of platforms like ZOOM now make it more feasible.
For more information on the new National Shortwave Listeners Club, go to https://swl.ie/