Thursday, December 16, 2021

18 countries heard on 28 MHz - 15th Dec 2021


Wednesday 15th December 2021:
For a change, I decided to let the radio listen for FT8 signals instead of the WSPR signals on the 28 MHz band to get an idea of what band conditions were really like.

Back at the end of October 2021, I heard 78 countries on 28 MHz in one day. On the 15th of December, condition were much more subdued with just 41 stations in 18 countries heard.

It's wasn't all doom and gloom as there were some DX stations on the 10m band including three from Australia.

Txmtr Band Mode Distance Time (UTC)
VK2DG 10m FT8 16956 km 09:42:29
VK5MRD 10m FT8 16794 km 10:22:14
VK6AS 10m FT8 15053 km 11:54:59

Note however though there was nothing from South and North America.

The solar flux was up at 103 which is reasonable but I suspect conditions on 28 MHz will remain subdued until we head towards the equinox in March. Hopefully, there will be some big mid-Winter Sporadic-E openings in the next 3-4 weeks to liven things up.

Wednesday, December 15, 2021

Trans-Pacific 50 MHz opening between New Zealand and South America - 14th Dec 2021


14th December 2021: It's interesting to see that long distance paths across the Pacific on the 50 MHz band are now beginning to get better in the southern hemisphere.

The map above shows some of the 6m signals heard by ZL1RS in New Zealand with paths to South America ranging from 9,836 kms to 12,595 kms.

 Txmtr Band Mode Distance Time (UTC)
PY4AQA 6m Q65 12595 km 22:30:30
PY2XB 6m Q65 12202 km 22:49:29
PU2MBY 6m Q65 12059 km 23:13:27
PY5EW 6m Q65 11967 km 23:33:27
PY5KD 6m Q65 11893 km 23:13:27
PT9FD 6m Q65 11825 km 23:08:29
LU5FF 6m Q65 10736 km 22:52:29
CE3VRT 6m Q65 9836 km 23:20:32

Note the mode... Q65! FT8 isn't the only weak signal mode.

The times are in UTC so in reality, this opening was during the daytime with the sun over the Pacific.

Propagation Mode??... As it's December, the Summer Sporadic-E season in the southern hemisphere has started and is likely to get better. 

If we assume the average Sporadic-E hop to be say 2000kms, did 5 or 6 of these hops line up for the 50 MHz signal to get from South America to New Zealand?

I'd be pretty certain that Sporadic-E was involved to some extent but I don't think anyone can say for certain it was 100% responsible. Was part of it chordal hop? Was the mesosphere region associated with noctilucent clouds involved?

As the openings get better, it'll be interesting to see the signals extend as far as Australia and what paths open up then.

Update from Bob, ZL1RS: Bob mentions that there have been several openings from ZL1 (North Island of New Zealand) to South America on 6m in the last few weeks.

25th Nov 2021 - CE (Chile) and PY (Brazil)
26th Nov 2021 - CE and LU (Argentina)
01st Dec 2021 - LU (RX only)
02nd Dec 2021 - CE
10th Dec 2021 - CE
14th Dec 2021 - as noted above

Bob adds... "... and on another date that I did not note, with propagation from ZL3 to SA.
... and signals from SA have been reported as received in VK3 and VK5 (while the operators were out of the shack). Having said that, the opening on 14 Dec was the most sustained so far this season ... signals in and out from 21:15 UTC until 23:15 UTC."

Tuesday, December 14, 2021

Lots of bursts on 28 MHz from Geminid meteor shower - 14th Dec 2021


On the morning of the 14th of December 2021, I noticed a lot of meteor scatter bursts of weak signals from G0MBA and G0PKT on 28 MHz. Both stations are located about 650kms to the east of me and the bursts were due to the Geminid meteor shower.

They are both sending QRSS signals which is very slow morse code which can be decoded visually and they transmit about 400Hz below the WSPR signals on 28 MHz. 

An example of what the signals should look like is shown below. This is from a Sporadic-E opening last May.


I did note this morning that while I was hearing all of these meteor scatter bursts, I was getting no WSPR decodes from either station. This was no great surprise as WSPR signals are nearly two minutes in length and only exceptional meteor bursts are that long even on a low frequency like 28 MHz.

As you can tell from the initial image, signals from meteor scatter look a bit of a mess and I'm sure this doesn't help with decoding either.

I did manage some WSPR decodes from both G0 stations later but I suspect it might have been weak Sporadic-E.

UTC (y-m-d) TX txGrid RX rxGrid MHz W SNR drift km
2021-12-14 08:38 G0MBA JO01 EI7GL IO51tu 28.126066 0.2 -19 -1 645
2021-12-14 09:18 G0MBA JO01 EI7GL IO51tu 28.126067 0.2 -20 -1 645
2021-12-14 09:38 G0MBA JO01 EI7GL IO51tu 28.126065 0.2 -24 0 645
2021-12-14 08:08 G0PKT JO01mt EI7GL IO51tu 28.126078 0.2 -22 0 647
2021-12-14 08:38 G0PKT JO01mt EI7GL IO51tu 28.126077 0.2 -15 -1 647
2021-12-14 09:18 G0PKT JO01mt EI7GL IO51tu 28.126078 0.2 -18 0 647
2021-12-14 09:38 G0PKT JO01mt EI7GL IO51tu 28.126075 0.2 -18 0 647
2021-12-14 12:18 G0PKT JO01mt EI7GL IO51tu 28.126076 0.2 -21 -1 647

28 MHz Meteor Scatter contacts??? ... I wonder if anyone has tried making meteor scatter contacts on 28 MHz with dedicated MS modes like MSK144? Considering how many bursts there are during major showers, contacts in the range of 500 to 1000kms should be really easy.

Saturday, December 11, 2021

Pause on new 40 MHz experimental permits in the USA


In a previous post, I outlined how seven experimental licenses were issued for the 40 MHz band in the USA. It now seems as if the FCC, the licensing authority in the USA are now turning down new applications.

It's possible there may be two reasons for this...

1) The FCC may have been contacted by existing users of the 40 MHz band about their fear of interference from these new experimental stations.

2) The FCC may feel that this is an attempt by radio amateurs to gain access to a new VHF band by the back door so to speak.

Hopefully, the FCC will be assured that the licenses issues are issued to people who want to conduct propagation experiments and it's not just another band for talking or DX-ing.

Links...
1) My 40 MHz page

Friday, December 10, 2021

3000km+ opening on 144 MHz between Australia & Fiji - 9th Dec 2021


As the Summer Sporadic-E season begins in the southern hemisphere, there have been reports of openings on the 50 MHz and 144 MHz bands.

In Australia, there is a very active community of stations using WSPR beacon mode on the 2m and 6m bands with a lot of success. On the 9th of December, the 144 MHz WSPR signal from VK2IJM near Sydney was heard almost 3200 kms away on the island of Fiji by 3D2TS.

UTC (y-m-d)        TX         txGrid  RX         rxGrid MHz W SNR drift km
2021-12-09 23:08 VK2IJM QF56ni 3D2TS RH91fv 144.490586 20 -29 -1 3218 

As you can see from the single reception report, the signal was -29dB which is an incredibly weak signal.

The two stations tried to complete a FT8 contact just 14 minutes later. 3D2TS on Fuji could hear VK2IJM at-21dB but 3D2TS wasn't strong enough in Australia to complete a contact.


Propagation Mode???... The next question is how did a 144 MHz signal get from Sydney to Fiji? The maximum distance for one hop Sporadic-E is about 2300kms so something else has to account for the additional 900kms.

It's probably no accident that this happened over a sea path and the most likely explanation is a combined one hop Sporadic-E signal that coupled into a marine duct over the ocean. The above tropo forecast map from Pascal, F5LEN certainly supports this theory.

It's not possible to completely rule out a 100% marine duct or a chordal hop Sporadic-E opening with two Sp-E clouds but the highest probability is a combined Sp-E / tropo duct.

Links...
1) Check out my 144 MHz page for details of more 3000km+ openings.

Thursday, December 9, 2021

End of the road for the World Radio TV Handbook (WRTH)


It was announced today that the World Radio TV Handbook is coming to an end and the 2022 edition will be the last one.

In a statement, the publishers wrote... "Having produced this book for the past 24 years, we are very sorry to announce that WRTH 2022 will be the final edition of World Radio TV Handbook produced and published by WRTH Publications. 

This has been an extremely difficult decision and was only made after a lot of thought and discussion. 
We know that many people rely on WRTH and greatly enjoy getting the new edition every year. 

We realise that this news will be disappointing for many people. We wish to thank you all for your loyal support over the years.

Good DX and Happy Listening,

Nicholas Hardyman (WRTH Publisher) and the WRTH Editorial team
"

Back before the widespread use of the Internet in the mid to late 1990's, this book was a must for any serious short wave listener.

Fast forward to today and there is a huge amount of information available for free online. In addition to that, shortwave broadcasting in many parts of the world has disappeared or declined.

The current price for the 2022 edition is £35 which is about €41 or $46. There may be post & packing costs to be added to that so it is quite expensive in contrast to what is free online.

If you would like to purchase the 76th and final edition of the World Radio TV Handbook then go to their website... https://wrth.com/_shop/

Wednesday, December 8, 2021

More information about the proposed Amateur TV experiments at 29.250 MHz & 51.7 MHz

In a previous post in August of 2021, I outlined how some radio amateurs in Europe plan to experiment with digital ATV (Amateur TV) on the 10-metre band in the Summer of 2022. That post generated quite a bit of interest.

On Monday the 6th of December 2021, the BATC streamed a YouTube presentation about current Amateur TV techniques and activity as part of the RSGB Tonight at 8 series.

While the video is about 75 minutes in length, the piece I found really interesting was about the proposed ATV experiments at 29.250 MHz and 51.7 MHz. They refer to these as the 'lower ATV bands'.

Amateur TV up to now has normally been used on the UHF and microwave bands. This new development at 29 MHz and 51 MHz will potentially allow ATV signals to be sent on frequencies which will achieve much greater distances via the ionosphere - i.e Sporadic-E and F2 layer.

I find it amazing that there is the potential of sending amateur TV signals between say Europe and  North America on the 10-metre band.

 The presentation with time guides are shown below...


Video guide...
03:35: Introduction starts
05:15: G8GTZ begins his presentation
06:55: What is ATV - Amateur TeleVision / Why amateur television? / ATV is going digital
12:00: Analogue V Digital ATV / Reduced bandwidth (RB-TV) / 80 kHz RBTV
16:30: UK ATV activity and repeaters
20:45: ATV on the air - 1 The lower ATV bands
22:45: ATV on the air - 2 Low cost 5.6 GHz FM ATV with example contact
29:45: ATV on the air 3 - DATV on QO100 (Geostationary satellite)
38:20 - DATV equipment / Getting started / Ryde DATV receiver / Portsdown DATV transceiver / DATV receive system / DATV transmit system / 
57:55: Info about British Amateur Television Club (BATC)
1:01:00 Q &A session

I am told that the numbers involved are likely to be small with perhaps something like 20-30 stations taking part. Special boards are being developed at present and no doubt, these will be be got ready for the Sporadic-E season next May.

It would be very interesting if some radio amateurs in North America got interested in this project.

Links...
1) BATC website... https://batc.org.uk/

Tuesday, December 7, 2021

Skewed propagation path on 28 MHz between Australia & South America - Dec 2021


Recently, Scott VK4CZ reported a skewed path on 28 MHz between Australia and South America.

The image above shows what happened. The direct and shortest path from VK4CZ to CE2SV is 11,800kms and is shown in Green. The beam heading from eastern Australia is 142 degrees.

VK4CZ however found that the FT8 signals from CE2SV peaked at about 70 degrees, a skewed path that was about 70 degrees off the direct path.

Scott mentions that the skewed path opening was from 21:00 - 22:00 UTC and I believe at that time period, the sun was directly over the centre of the Pacific.

VK4CZ was using an ICOM IC-7600 with a 5-element monoband Yagi for 28 MHz at 20 metres above ground level.


Scott, VK4CZ writes... "It's been amazing to see the scatter path to South America out of the North Pacific available again on 10m yesterday and again this morning. This path was a consistent feature through the peak of last cycle, and with digital modes it's becoming available now!

Worked/seen this morning were HK (Columbia), LU (Argentina) and CE (Chile) all peaking at a QTF of 70. Direct QTF for CE 145... so well off a direct path.

It's an interesting propagation mode that I regularly observe across the Pacific. As I understand, it's trans-equatorial scatter.

The same path should be available to Africa in the afternoon/evenings from here.

The likelihood of it also being available at 50MHz is high.... we'll just need the cycle to progress towards the peak to be sure.

A couple of cycles back, I heard Peter PY5CC in Brazil on 6m CW using the same path (albeit late afternoon when TEP peaked to KH6 / Hawaii)."

Analysis... This is my understanding of what happened and I'm open to correction. Directly under the sun near the equator, the solar radiation is at it's highest and the F layer of the ionosphere is highly ionized with a high maximum usable frequency (MUF).

This is usually split into two zones of high electron density either side of the geomagnetic equator but in December, the southern one is much larger.

This can be thought to be like a tube like structure that is stretched out east-west.


The above graphic is a bit rough but you can get the general idea of the signal hitting the F layer from the side.

Skewed paths are a fascinating subject and are allow serious DXers and contesters to exploit paths when the direct path isn't possible. This is especially true on the higher HF bands like 28 MHz where the shortest east-west paths are often closed.

I suspect these skewed paths happen a lot more often than we realise especially now that so many people are using weak signal modes like FT8.

Sunday, December 5, 2021

Guest Post: VHF & UHF operation... by Alan Johnson, VK3DXE

VK3DXE in Australia recently posted this article on his Facebook page and it is republished here with his kind permission to reach a wider audience. In it, he outlines what attracted him to the VHF bands.


I've been a member of a number of VHF/UHF Ham pages for a while, and keep seeing a lot of misconceptions and myths being picked up and quoted over and over by newcomers, and sadly a lot of not-so-newcomers who’ve brought their HF Game with them to the higher bands. 

I first became fascinated with VHF tropo propagation as a young kid living in the country, where we only had 2 TV channels, but occasionally we’d get the channels from the city suddenly appear when the conditions were right. You can imagine the excitement for a young kid way back then who's suddenly discovered some new TV channels! We had a neighbour up the hill who happened to be a Ham, and he explained to me how tropo worked. I was hooked, and from then on, whenever the weather forecast maps looked promising, and we got the right conditions, summer or winter, I’d start looking for the telltales that the city channels were going to pick up.

Fast forward 7 or 8 years, and I eventually got my Australian Novice license, quickly upgrading to the Advanced Call within a year when I was about 15 or 16. We were near the top of the sunspot cycle at the time, so I went nuts on HF for the next few years. But as the sunspots waned, I was drawn to the higher bands…..

As a youngster it was sometimes tough putting up a decent 2m yagi, but I always found a way of getting something in the air, and making the most of what I had available, even when living in rental housing. I just had to be creative, and sometimes a bit cheeky. The good thing about a 2m yagi though, was that even if anybody noticed it, they'd just figure it was a TV antenna.....  

You can build a small yagi like this in an afternoon with some simple tools.

I learned about aircraft enhancement in the days before we had all the funky tools we have today, before the widespread coming of the Internet. We managed to regularly make 2m SSB contacts of up to 700km (400+ miles) with smallish yagis and relatively low power - one path of 740km was quite good even with my portable station, with just a little 4 element yagi and Yaesu FT-290R II running only 2.5 watts!  

Living in inner city urban areas, I really began to appreciate low noise antenna designs (DL6WU & K1FO were the early leaders) and radio frontends that didn't collapse in the presence of strong out of band signals. I learned about GaAsFET LNAs (Low Noise Amplifiers, or preamps) too, and the importance of what was in front of the radio on RX. You have to think of your station as a system.

In the early 1990’s the Bible of VHF+ was published. The VHF/UHF DX Book very quickly became the must-have tome in every serious VHFer’s library. Although some of the chapters are now a bit dated, especially those relating to equipment, I strongly suggest everybody with even a fleeting interest in the higher bands downloads a copy and reads it. Hopefully it’ll help to undo some of the myths about VHF+ that have persisted in the hobby for far too long, things like the belief that troppo is only a summertime thing, and that troppo is the only worthwhile propagation mode on VHF+. Download it here: http://www.trpub.net/assets/applets/VHF-UHF_DX_Book.pdf

As the Internet came along and people developed all sorts of new tools, and we learnt about Forums, email reflectors, and then FaceBook pages, the opportunities to learn and collaborate grew amazingly.

Then the WSJT suite of software changed things overnight. All of a sudden, the little guys running just 100w to a 10 element yagi could successfully work stations on the other side of the world on 2m and above via EME, or Earth-Moon-Earth. I worked a dozen countries with just a single yagi and less than 200w at the antenna. 

Just last weekend, I was listening to HB9Q in Switzerland on 23cm for hours here in my /P shack while we're living in temporary accommodation, with a beautiful steady signal, often quite audible in the speaker, all on a tiny 60cm x 90cm gridpack antenna. 


Eventually, once I get my 2.4m dish in the air and find a suitable amplifier, I hope to be able to work him on 23cm SSB at home.... JT65 and Q65 will be an absolute walk in the park.

Lots of signals on 23cm with the gridpack.

In Australia, where we don’t have the population of Europe or North America, the Ham fraternity have embraced WSPR on 2m, and have demonstrated VHF paths of sometimes thousands of kilometres that no amount of listening to white noise for beacons or a coincidentally-timed CQ would find with the naked ear. Those paths are now being exploited regularly on digital modes, with people moving to SSB when conditions become strong enough. I've been around the hobby for a long time, but so too have the "old farts", some of whom vociferously decry the use of digital modes, but our experience here in Australia has really demonstrated how digital modes can be exploited to help get those SSB contacts that very probably would never have taken place otherwise. WSPR has been so successful that there are now WSPR beacons on Hawaii (often heard on West Coast USA), and in New Zealand, with a fantastic signal into East Coast Australia during the summer tropo season.

A little 4 element Cushcraft yagi. Even this is enough to decode some of the Big Guns off the Moon. I had many WSPR 2-ways with this one, out to 700km with Aircraft Enhancement

Next time you're asked by anybody (PARTICULARLY CHILDREN AND YOUNG PEOPLE) about the hobby, instead of trying to excite them with boring stories of talking on HF or FM repeaters, which they tend to equate with the equivalent of dialing random numbers on their cellphone to talk to old farts with bad combover hairstyles about their hemorrhoids, try telling them about stuff like all the space comms stuff we have access to, and can actively participate in, like using the repeater on the ISS, and all the other satellites we have access to. Tell them about Moonbounce, and how you can actually demonstrate the speed of light in action - you know exactly when the station on the other end has stopped transmitting, but can still see and hear his signal coming back at you for those additional 2 or 3 seconds it takes to travel all the way to the Moon and back. THAT gets young people more excited than listening to old farts! Try talking to them about meteor scatter, and how the military has used it for communication systems to counter the effects of comms satellites being wiped out in a conflict, or a dirty big EMP bomb wiping out HF. Tell them about aircraft enhancement, which is really bistatic radar, and how some clever dude worked out a way of using it to detect stealth aircraft by using commercial broadcasters behind enemy lines to illuminate the target. Tell them about all the really funky atmospheric and weather science they can learn just by playing with weak signals on VHF+. Tell them about the funky networking knowledge they can gain from modes like D-Star, IRLP, Echolink, etc. 

The /P shack while I'm away from home

Anyways, I've written this piece in response to a recent influx of newcomers and not-so-newcomers to the higher bands, possibly on the back of purchasing themselves a brand new IC-9700. I fully appreciate that everybody starts their learning journey from different places and has different interests, but some of the myths and misunderstandings I see are staggering. Unfortunately, so much of the Ham narrative has become very HF-centric, and that mindset often pervades discussions, and the marketing of the hobby, so this is just my little bit to try to counter some of that.  Remember to download the VHF/UHF DX Book from the link above, and jump onto some of the more technical pages and start learning. 

I'll be doing a bit of a write up soon on the importance of frequency accuracy and STABILITY on VHF+. Watch this space.

Enjoy!

de VK3DXE

Friday, December 3, 2021

Successful WSPR reports on the 40 MHz band in the USA - Nov 2021


Over the last few months seven stations in the USA have received experimental permits for the 40 MHz band... see previous post.

While a few have tried FT8, a number have been using the WSPR mode as an experimental beacon. 

A list of of some of the reports are shown below with maps shown above.

1) WX2XCC in California is operated by Chris, N3IZN and he has a remote receiver listening for his own WSPR transmissions. During what was probably a Sporadic-E opening on the 40 MHz band, he was decoded by VA7MM in Vancouver in western Canada at a distance of 1819 kms.

UTC (y-m-d) TX txGrid RX rxGrid MHz W SNR drift km
2021-10-28  22:12 WM2XCC DM13 N3IZN/SDR DM13ji 40.663484 2 7 0 21
2021-11-28 17:48 WM2XCC DM13 VA7MM CN89og 40.663488 2 -17 0 1819

2) WM2XEJ in Georgia is operated by Tom, WB4JWM and his WSPR signal has been reported by two stations... NZ2X and N4WLO.

UTC (y-m-d) TX txGrid RX rxGrid MHz W SNR drift km
2021-11-23 15:08 WM2XEJ EM83 NZ2X EM83ij 40.663473 10 5 0 25
2021-11-29 17:48 WM2XEJ EM83 N4WLO EM50uo 40.663433 10 -23 0 589

While NZ2X is a local station, the distance to N4WLO is 589 kms which is pretty short if it was Sporadic-E.

3) WX2XCW is operated by Hal, NR7V is just in the far north-west of Washington state. He is very close to the city of Vancouver and all of the reports are from local Canadian stations.

UTC (y-m-d) TX txGrid RX rxGrid MHz W SNR drift
2021-10-28 22:06 WM2XCW CN88 VA7MM CN89og 40.663527 0.2 2 0
2021-10-28 22:06 WM2XCW CN88 VE7UTS CN89li 40.663524 0.2 -8 0
2021-11-22 18:16 WM2XCW CN88 VE7RPX CN89lh 40.663529 2 -16 0
2021-11-22 18:36 WM2XCW CN88 VE7AFZ CN89ji 40.663527 2 -28 0

Overall, it's still early days but hopefully more stations will start transmitting on WSPR and more will start listening and uploading their spots to the WSPRnet website.

Link...
1) More info on my 40 MHz page

Wednesday, December 1, 2021

New experimental license issued for the 40 MHz band in Canada - Q4 2021


In a recent post, I outlined how seven stations in the USA had been given experimental permits for the 40 MHz band.

One of those permits (WM2XCW) went to Halden Field, NR7V in the far north-west of Washington state. Halden also holds the Canadian callsign of VE7UTS and he has also received an experimental license from the Canadian authorities for the 40 MHz band.

The experimental callsign allocated is CGB209 and it is for 50 watts ERP from a fixed location in a 4 kHz wide frequency allocation centered on 40.6635 MHz.

VE7UTS writes... "CGB209 is now transmitting from the same location as VE7UTS on a 10-minute interval.  The VE7UTS receiver is deaf when CGB209 is transmitting.  

CGB209 is encoded in reverse sequence in the WSPR packet because WSPR protocol doesn't support numbers in a callsign suffix or a letter as a callsign's 3rd character."

CGB209 has been transmitting for the last few weeks on WSPR on 40 MHz and has been received by the following stations locally in the Vancouver area.

UTC (y-m-d) TX txGrid RX rxGrid MHz W                 SNR drift 
2021-11-16 20:02 902BGC CN89 VE7RPX CN89lh 40.663529 0.2 -3
2021-11-17 04:52 902BGC CN89 VA7MM CN89og 40.663528 0.2 -13
2021-11-21 15:36 902BGC CN89 VE7UTS CN89li 40.663406 1 -13
2021-11-23 05:30 902BGC CN89 VE7AFZ CN89ji 40.663526 1 -25

VE7UTS / CGB209 is currently using 1-watt into a quarter wave ground place and hopes to upgrade to 10-watts soon.

Analysis... The main propagation mode for experiments in the short term is going to be Sporadic-E and with a maximum single hop distance of about 2200kms, all of the current US experimenters will be out of range with the exception of WM2XCC in southern California. 

Over the Winter months, there will be plenty of Sporadic-E openings on the 40 MHz band and it's likely that anyone in the LA to San Francisco area will be able to hear the 40 MHz WSPR signals from Canada if they put their mind to it.

From the second half of April 2022, the single hop Sporadic-E openings will become a lot more common. In May, June & July 2022, some double hop openings to the eastern half of the USA are possible.

F2 to Florida???... As we head towards the sunspot maximum, the maximum usable frequency will climb upwards and will reach the 40 MHz band. It will be interesting to see if there will be a 4000km opening via F2 propagation from Vancouver to Florida?

Canadian Info: If any radio amateurs in Canada are interested in trying for a 40 MHz 'Developmental Licence', have a look at this website for more info... https://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf11373.html#how

40 MHz Info: As always, check out my 40 MHz page which has plenty of information about this new 8m band.... https://ei7gl.blogspot.com/p/40-mhz.html

Monday, November 29, 2021

Example of TEP on 40 MHz between South Africa & Spain - 30th Oct 2021


Back on the 30th of October 2021, there was a nice TEP opening on the new 40 MHz band between South Africa and Spain.

Joan, EA3ERE reports that he heard the ZS6WAB beacon on 40.675 MHz using an ICOM IC-7300 and a dipole for the HF bands. The distance was almost 8000kms.

Joan kindly sent on a video of the reception and it's shown below...

Saturday, November 27, 2021

Galway Radio Club Newsletter - Issue 3 - Winter 2021


Galway Radio Club have just released their Winter 2021 edition of their annual newsletter and as always, it's packed full of interesting features.

It literally covers the whole spectrum going from a 5-element beam for the 80m band to WiFi interference in the microwave bands.


You can view the PDF document HERE

For a free publication, a lot of work has obviously gone into compiling it and it a credit to what is a small radio club.

I have links to the 2019 and 2020 editions below.

3) For more information on the Galway Radio Club, visit https://www.galwayradio.com/

Friday, November 26, 2021

Baofeng UV5R is banned for sale by German authorities


The Baofeng UV-5R is a hugely popular handheld radio covering both the 144 and 432 MHz bands and is usually available for a very low price.

It is also well known for not being the cleanest of radios transmit wise with many spurs which aren't that far below the fundamental signal which can be a potential source of interference to other services.

On the 24th of November 2021, the German authorities announced a ban on sale of this radio.

Will a EU wide ban follow??

From Google translate...

Official Journal of the Federal Network Agency for electricity, gas, telecommunications, post and railways 
22 2021 - regulation, telecommunications - 1457

Ordinance No. 91/2021
Law on the provision of radio equipment on the Market (Radio Equipment Act -FuAG):
General decree regarding a sales ban for a machine
As part of the market surveillance according to the FuAG, the Federal Network Agency pointed out that the below named device does not comply with the requirements of the FuAG.
The Federal Network Agency issues on the basis of Section 23 Paragraph 2 No.4 i. V. m. § 30 Paragraph 3 FuAG the following
General decree:
1. The further provision, placing on the market and the passing on of the device listed below is prohibited.
Information about the device:
Product Type: Radio
Device type: radio telephone
Model: UV-5R 5W HT
Trademark: BAOFENG

Importer: Agnieszka Bastek Demo Bis, Warsaw

Modest conditions on 28 MHz - 25th Nov 2021


Thursday 25th November 2021:
For the last week or so, I've left the radio listening for WSPR signals on 28 MHz and the number of stations that I am hearing has seemed to decrease.

For a change, I listened to the much more active FT8 frequency on 28 MHz and and the map for the day is shown above. There are some DX signals in there including Australia and Thailand but I wouldn't say conditions were particularly good.

I heard a few Sporadic-E signals from western Europe but most of the stations heard were via F2 propagation. You can clearly see the first hop F2 signals going from the south of Italy, though Greece and up to the Ukraine and Russia.

The solar flux was 84 which is low enough as the sun seems to have lost a bit of its recent sunspot activity.

Wednesday, November 24, 2021

Video: A beginners guide to FT8 ...by VK7HH


Even though I don't use FT8 for making contacts, I find it to be a very useful tool in that it can give me a very good idea of what band conditions are like after listening for just a few minutes.

Hayden, VK7HH recently released this video which might be of interest to anyone new to the mode.


Chapters
0:00 An Introduction for Beginners
0:28 What is FT8?
2:16 A QSO Example & How well does it work?
4:16 Get Your Timing Right!
5:12 Setting up WSJT-X for the FT8 Mode
8:29 My Waterfall settings
9:44 Transmitting and message sequencing
14:54 Setting your TX audio level and ALC drive
17:15 I've never worked that country before!
18:11 How much Power should you run?
19:48 A bonus tip to level up your DX abilities!

Tuesday, November 23, 2021

FM radio station in Colombia on 93.1 MHz heard in Chile via TEP opening - 21st Nov 2021


21st November 2021: Back in October, I had intended to publish a post about reception of a FM radio station on 93.1 MHz in Columbia by Alejandro, CE3VRT in Santiago, Chile. The distance was 5000kms and the propagation mode was TEP - Trans-Equatorial Propagation.

I was so busy, I forgot to publish it and it remained as a draft! The post is now shown below for the 20th of October 2021. 

What reminded me of this was that CE3VRT heard the same radio station again on 93.1 MHz but this time the TEP signals were so strong, he was able to hear them with just the telescopic whip on his TecSun PL398.

Back in October, Alejandro was using a log periodic directional antenna outdoors on a mast to hear the signals but to hear FM radio signals on 93.1 MHz on the VHF FM band from 5000kms away with just a telescopic whip is really amazing.


20th October 2021:  Recepción FM DX via TEP (muy fuerte) "La Mega" 93.1Mhz Colombia, desde Stgo, Chile. Reception of 'La Mega' radio station in Colombia on 93.1 MHz by CE3VRT in Chile

Propagation mode: TEP
Distance: Approx 5000kms

"TEP opening (trans-equatorial propagation) very strong and somewhat short. The station tuned is "La Mega" from Barranquilla, Colombia, reception in the southern zone of Santiago de Chile (~ 5000km) using an Airspy HF + dual port and a logarithmic directional antenna for TV / FM."

Reception on Wednesday, October 20, starting at 21:30 PM local time (Oct 21 - 00:30 UTC)

Monday, November 22, 2021

EI2TKR 2m repeater in NW Ireland to return to service soon

The EI2TKR repeater in north-west Ireland has been off the air for a number of years. It used to operate on 145.700 MHz.

The good news is that the repeater has been upgraded and is currently on test at a site near Bundoran in the south of Donegal.

It is currently running 25 watts and it is hoped to upgrade that to 50 watts in a few weeks time. 

The eventual plan is to put the repeater back up on Truskmore, a 647 metre high mountain in the NE of Co Sligo sometime in 2022.

Details of the FM repeater...

Channel RV56 (R4).
Output Frequency 145.700MHz
Input frequency 145.100MHz
CTCSS only 77Hz.

Reports to EI5IMB.

Friday, November 19, 2021

There are now 7 experimental US stations on the 40 MHz band - Nov 2021


18th Nov 2021:
In previous posts, I detailed how some amateur radio stations in the USA had managed to obtain special experimental permits to operate on the new 40 MHz band. 

The first 40 MHz permit WL2XUP near Atlanta was issued back in June of 2021. See this previous post.

The second permit WL2XZQ near Houston was issued in August. See this previous post.

As of mid November 2021, there are now seven experimental permits for the 40 MHz and these are shown on the map above and in the list below. An eight from Alabama is pending.


The permit allows for experiments in the frequency range of 40.660 to 40.700 MHz which is the 40 MHz ISM band (Industrial, Scientific, Medical).

The permits allow ERP powers in the region of 100-400 watts and the license lasts for two years.

Propagation: If you examine the map above, you'll note that the distances between the various experimenters.

For example, take WM2XCS in New Jersey. He is 950kms from WM2XAN, 1200kms from WL2XUP and 2250kms from WL2XZQ. 

WL2XZQ in Houston is 1800kms from WM2XAN.

WM2XCC in California is 2100kms from WL2XZQ, 3050kms from the stations near Atlanta, 1800kms from WM2XCW.

WM2XCW is the far north-west of Washington state is 3150kms from Houston and 3900kms from New Jersey.

It is highly unlikely that tropospheric propagation will contribute much to the experiments. The distances for aircraft scatter are also likely to be too far. Some in the 500-1200km range may manage to complete contacts with digital modes like MSK144 with meteor scatter.

The real workhorse on the 40 MHz band is going to be Sporadic-E. There may be a few openings over the next few months but things will really get going at the end of April 2022. At that stage, the experimental stations will have had time to get their radios and antennas ready for the band and I'd expect that contacts in the range of 800 to about 2200 kms will be common with something in the region of 1700kms being the most common distance.

In the second half of May 2022, double hop Sporadic-E openings will become more common and at that stage, contacts from the west coast to the eastern half of the USA should be possible.


Crossband: Just like in Europe, there are likely to be crossband contacts from 40 MHz to 28 MHz and from 40 MHz to 50 MHz with those who cannot transmit on the 8m band. 

Someone doesn't need an special 40 MHz permit to take part in the experiments. The experimental stations are likely to be using SSB, CW, FT8 and WSPR and I'm sure they would like to make as many crossband contacts as possible as well as receiving any reports of their transmissions.

Analysis: It's great to to this surge in interest in the 40 MHz band in the USA. The 8m band is NOT just another band. It is halfway between the 28 MHz and 50 MHz bands and it can be useful for exploring just how high the maximum usable frequency (MUF) goes as the solar activity increases as we head towards the sunspot maximum.

For example, it would be interesting to know what kind of solar flux/sunspot number is required before there are east-west openings between say California and the eastern part of the United States.

It would be really nice if some stations in South America were able to listen on the 40 MHz band and then try to complete some crossband TEP contacts with experimental stations in the southern states of the USA.

Links...
Check out my 40 MHz page for more info... https://ei7gl.blogspot.com/p/40-mhz.html

Wednesday, November 17, 2021

Some local tropo on the FM band (88-108 MHz) - 17th Nov 2021


Wednesday 17th November 2021: I noticed some tropo signals on Band 2 (88-108 MHz) this afternoon and I spent a while doing a scan of the band.

The biggest problem is that I can hear around 75 signals on the band under flat conditions and that doesn't leave many gaps on the band for distant signals to come through.

I did hear four stations that were certainly via tropo propagation with distances ranging from 167 to 281 kms.


Under flat conditions, I can hear some of the main network FM stations on mountains that are about 130kms away.

While this reception report isn't all that unusual, it was still nice to catch these signals by just using the telescopic whip antenna of my TecSun PL-380 standing at a north facing window of my house.


It always impresses me how well this little radio works with just its own antenna.