Opening to Australia on 28 MHz - Sat 14th Nov 2020

 

As can be seen from the map above, there was a pretty good opening on 28 MHz on Saturday the 14th of November 2020. Even though I have heard the north and west of Australia earlier this week, what really stood out on the 14th was the opening to the south-east of Australia. That is the furthest part of the continent away from me and the signals have to travel roughly 17,500 kms.

In total, I heard seven Australian stations on FT8 on 28 MHz...

VK3BE 10m FT8 17540 km 09:36:14
VK2BGL 10m FT8 17482 km 09:16:44
VK3EW 10m FT8 17464 km 09:49:29
VK3FZ 10m FT8 17437 km 10:32:29
VK2LAW 10m FT8 17434 km 09:23:14
VK2NSS 10m FT8 17419 km 10:01:44
VK2JAS 10m FT8 17419 km 10:09:44

The map also shows that there was some Sporadic-E to central Europe as well as some F2 propagation to eastern Europe and Russia.

The other signals of interest for me were the three from Newfoundland.

VO1NE 10m FT8 3362 km 14:44:44
VO1AW 10m FT8 3238 km 12:44:44
VO1CH 10m FT8 3164 km 12:54:29

I'd be pretty confident that these were via F2 propagation as the distance to the west to Newfoundland is about the same as the other F2 signals from the east.

The solar flux on the 14th of November was 82 which is slowly reducing having reached a recent peak of 94 on the 6th of November.

Opening to the USA on 28 MHz - 13th Nov 2020

 

The conditions on 28 MHz on Friday the 13th of November 2020 weren't great but the band did open up to the USA.

There were some Sporadic-E signals from the centre of Europe but not a huge number. There were no Russian stations to the east heard on the band indicating a lack of F2 propagation in that direction.

And yet, a handful of stations from the USA were heard. Was it via multi-hop Sporadic-E? Was it via F2 layer propagation? I suspect it may have been F2 but it's impossible to tell.

The solar flux was around 85 which is certainly up on the last few months but is still pretty low in terms of allowing east-west paths on 10-metres.

Video: Introduction to Amateur Radio Satellites by AMSAT-UK

 

As part of their ongoing presentation series online, the Mid Ulster Amateur Radio Club recently had an interesting talk on Amateur Radio Satellites.

The talk which is given by Dave, G4DPZ is shown below. The Q&A session starts at 1:08:10.

The video gives a good introduction to the world of amateur radio satellites and should be of interest to any beginners.

3000km plus contact made on 433 MHz from St.Helena to South Africa - 16th Oct 2020

On the 16th of October 2020, there was a remarkable 3000+ km contact made on the 70cms band between South Africa and St.Helena in the South Atlantic.

The contact at 433 MHz was made between Garry, ZD7GWM on St.Helena Island and Tom, ZS1TA in South Africa. The distance was approximately 3136 kms and what was even more amazing was that the contact was made on FM!

The power used for the contact was a modest 35 watts into a vertical antenna. This was a new distance record for a contact between South Africa and St.Helena on the 70cms band.

The mode of propagation was probably a marine duct as shown by this tropo forecast map from Pascal, F5LEN.

This 3000km+ tropo path between South Africa and St.Helena opens up on a reasonably regular basis. Back in November of 2018, there was an opening on 144 MHz as outlined in this previous post.

In June of 2020, the 2m path opened up again and the most recent opening on 2-metres was on the 23rd of September 2020 when ZD7GWM was worked by no fewer than five ZS stations... ZS1TA, ZS3CVB, ZS1CF, ZS3JPY and ZS1FC.

To put these remarkable contacts on 144 MHz and 433 MHz into context, the 3136 km distance is equivalent to the path across the North Atlantic between Newfoundland and Ireland.

Link...

1) Cape Town Amateur Radio Centre: ZS1TA & ZD7GWM Set New 70cm Distance Record - 16 Oct '20

Contact between Ireland and Slovenia on 40 MHz - 31st Oct 2020

 

While the main Sporadic-E season occurs mainly from May to July every year, there are still smaller openings at other times of the year.

One such opening occurred on the 31st of October 2020 when EI4GNB and S5/M0MPM made the most of it to complete an FT8 contact on 40 MHz.

Michael, S5/M0MPM writes... "After a few trials over the last few weeks, I heard/saw Tim's signals a few times, in FT8 and JT65, and finally we managed a contact. Tim contacted me by Whatsapp to warn about the opening, luckily I was available.

Both 6M and 10m were open between Slovenia and Ireland, and so it worked on 8m as well.

Tim was quite strong with me, but unfortunately I only had my G5RV antenna available, with a tuner.

It tunes alright on 10 and 6, so I gave it a try on 8 and the trx was happy enough (an FT857D) but my signals were quite weak with Tim, despite the 50w from my side.

Distance covered: 1730 kms (JN75PX to IO63WE) Signals were TX:+5  RX:-20. Time was 13:40z on 31Oct 2020"

40 MHz allocations... At the time of writing of this post (Nov 2020), a total of four countries have some sort of access to the 40 MHz band... Ireland (EI), Slovenia (S5), Lithuania (LY) and South Africa (ZS).

Most of the activity is centered around 40.680 MHz which is in the middle of the ISM (Industrial, Scientific, Medical) band which goes from 40.660 MHz to 40.700 MHz.

More information about the 40 MHz band can be found on my 40 MHz page... https://ei7gl.blogspot.com/p/40-mhz.html

28 MHz wakes up as the sunspots return - Nov 2020

 After reading reports of recent activity on 28 MHz, I started listening again on FT8 on the 10-metre band to see what conditions were like.

As the PSK Reporter map above shows, there was plenty of activity on the band on Friday the 6th of November 2020.

While there was some evidence of Sporadic-E activity around Western Europe, there was plenty of evidence of F2 propagation from Russia and SE Europe. Outside of some North-South propagation to Africa and South America, it was interesting to see openings to Indonesia and Australia.

There's always something special for me about hearing Australia on 28 MHz. It's no big deal on the other HF bands but for the path to be open at 28 MHz then something must be happening.

The Sunspots Return... The improvement in conditions on 28 MHz is due to the sunspots returning and the solar flux getting up into the low 90's. The chart below from NOAA (National Oceanic and Atmospheric Administration) in the USA shows the number of sunspots from 2009 to 2020 and projected out to the next peak of the solar cycle projected to be in 2025-2026.

It shows a peak back in 2014 and the minimum of the sunspot cycle in December of 2019. It also shows an increase in the sunspot number.

The chart below shows the minimum period in more detail.

The Purple line shows the smoothed sunspot number with the minimum clearly shown at the end of 2019. The Black line shows the smoother sunspot number for each month.

What is significant here is the average sunspot number for October 2020. The last time it was that high was back in October 2017, three years ago.

As we come out of the sunspot minimum, there will be peaks and dips but the overall projection is still upwards. As the solar flux increases, the higher HF bands will spring into life especially on North-South paths.

It will be interesting to see when will we get regular openings to the USA on 28 MHz from NW Europe? It will probably start with openings to Florida but it's the F2 openings to Newfoundland, Nova Scotia and Maine that I'd be really interested to see.

Link...

1) Solar Cycle Progressions - NOAA

5300km TEP opening on 144 MHz between Argentina and the Caribbean - Nov 2020

 In a recent post, I reported on a Trans-Equatorial Propagation (TEP) contact between Guadeloupe and the south of Brazil on 144 MHz which happened in October of 2020. The distance for that contact was in the region of 4455 kms.

At the start of November 2020, there was an even more remarkable 5312 km contact between PJ2BR in Curacao and LW2DAF in Buenos Aires, Argentina.

In the graphic above, the geomagnetic equator is shown in Pink. Both PJ2BR and LW2DAF are equidistant from it and are also at right angles to it, both factors which are important at 144 MHz.

With Trans-Equatorial Propagation (TEP), zones of high ionization occur either side of the geomagnetic equator in the F layer of the ionosphere. What makes the mode so interesting is that it can allow propagation on the VHF bands from 50 MHz to 144 MHz. As the zones of ionization is roughly 400kms above ground level, the propagation paths achieved are in the region of 4000 to 5000 kms, much greater than what might be usual with Sporadic-E.

What's even more remarkable about this contact is that it took place on SSB! See the video below...

QSO de anoche en 144 MHz vía TEP con @PJ2BR, 5300 Km. GF05<>FK52. pic.twitter.com/e8EXOPCLDz

— Diego Alejandro Feil (@LW2DAF) November 3, 2020

If you listen carefully, you can hear a warble on the audio as the SSB signal becomes distorted on the 5300 km path.

PJ2BR worked a number of other stations in Argentina on 144 MHz SSB as well including LU2EPO at 5367 kms. Other stations worked were LU7DW, LU5BE, LU1DL and LU4DIR.

The opening was on the 3rd of November 2020 at around 00:00 UTC which was at 20:00 local time on the 2nd of November for PJ2BR in Curacao.

To put the 5300km distance in perspective, it is the same as the distance between London in the UK and the city of Boston in the USA.

Galway Radio Club Newsletter - Issue 2 - Winter 2020

In November of 2019, Galway Radio Club released Issue 1 of their annual newsletter and it was read by radio amateurs all over the world. The club has now released Issue 2 which is for the Winter of 2020.

 

As well as covering some local news items, the newsletter covers a wide range of subjects from satellite operation to digital radio to antennas. 

The index of the newsletter is shown below...

The newsletter can be seen HERE

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

Video: Talk on Band Pass Filters for the HF Bands by 5B4AGN

The Mid-Ulster Amateur Radio Club are continuing their successful lecture series for 2020 and on Tuesday the 27th of October, they had a presentation by Bob Henderson, 5B4AGN on band pass filters.

The video of the talk which is about 1hr 40m in length can be seen below...

06:30... This is the start of the slideshow and Bob outlines some basic configurations.

20:40... This section of the talk outlines the use of the ELSIE programme for designing band pass filters.

33:20... In the main section, band pass filters for the HF bands are covered and it is mainly aimed at those interested in contesting and expeditions.

1:03:34... This is the start of the Q&A section.

* * * * *

The 5B4AGN Band-Pass Filter is shown above and there is a lot more information available in the links below.

Links...

1) Dedicated GROUPS.IO website for the 5B4AGN BPF

2) M1GEO website

3) AC0C website

4) ELSIE programme

Postage Stamps for the first 50-Years of Irish Broadcasting - 1926 to 1976

 

On the 5th of October 1976, the Irish postal service issued special stamps commemorating the 50th anniversary of broadcasting in Ireland.

The first day cover shown above is courtesy of Paul Logan, MI3LDO from Co.Fermanagh.

A close up of the stamps is shown below...

Video: Mid-Ulster ARC lecture on SDRPlay receivers

 

In the past, traditional good quality superhet receivers have tended to be somewhat expensive as they required a fair amount of hardware in terms of mixers, amplifiers and filters. In the last decade, modern software defined radios have turned this on its head and now, a good quality receiver can be bought for a very modest price.

In October 2020, the Mid-Ulster Amateur Radio Club had a lecture about the SDRPlay range of receivers. These are generally well regarded in terms of performance and price.

The video can be viewed below. It is somewhat long at 1hour 38mins. 

The main presentation starts at 02:29 and runs until 49:30. After that, there is a Q&A session which lasts for another 50 minutes.

Upcoming ZOOM presentation about the communications system for Ireland's first satellite - EIRSAT-1

 

EIRSAT-1 is due to be released from the International Space Station sometime in 2021 and this will be Ireland's first satellite in space. See previous post.

South Dublin Radio Club are organising a special ZOOM presentation with two of the EIRSAT-1 team members on Tuesday the 27th of October 2020 at 9pm Irish time (21:00 UTC).

During the presentation, they will discuss how they will communicate with the satellite from the ground station at University College Dublin and how others can listen in and contribute as well.

For  access to the ZOOM meeting, South Dublin Radio Club can be contacted here... https://southdublinradioclub.weebly.com/contact.html

Virtual tour of the historic Swedish SAQ transmitter operating at 17.2 kHz

 

South Dublin Radio Club had an interesting Zoom presentation on the 20th of October 2020 about the historic SAQ transmitter in south-west Sweden.

This transmitter operated at the very low frequency of 17.2 kHz and was established in 1924 to send telegrams across the Atlantic to the USA. Not long after its opening, low frequency stations of this type were superseded by those using the more efficient short wave bands.

What makes SAQ unique is that it is the last surviving transmitter of its type in that it generated the radio signal by mechanical means. See the photo below...

The electric motor on the right provides the mechanical force. The gearbox steps up the speed by a factor of three. The RF generator on the left is an alternator operating at 17,200 Hertz or 17.2 kHz.

The transmitted power is then fed to an antenna which is 2.2 kms in length.

The one-hour presentation is now available on YouTube...

Links...

1) Grimeton SAQ website

TEP openings on 144 MHz between Brazil and the Caribbean - Oct 2020

 

With Trans-Equatorial Propagation (TEP), zones of high ionization occur either side of the geomagnetic equator in the F layer of the ionosphere. What makes the mode so interesting is that it can allow propagation on the VHF bands from 50 MHz to 144 MHz.

As the zones of ionization is roughly 400kms above ground level, the propagation paths achieved are in the region of 4000 to 5000 kms, much greater than what might be usual with Sporadic-E.

TEP propagation normally peaks around the equinox and there have been some interesting contacts made recently between the south of Brazil and stations in the Caribbean.

One such example was a recent contact on 144 MHz between FG8OJ in Guadeloupe and PY2PAL in Brazil. On the map above, the position of the actual equator is shown in Blue while the Geomagnetic Equator is shown in Red.

You can hear the SSB contact on 144.299 MHz below...

Amazing TEP on 2m. Qso with PY2PAL 4455 km pic.twitter.com/GmrD7VkEVC

— ＦＧ８ＯＪ🏝️🛰️🌑 (@FG8OJ) October 11, 2020

Note the curious warble on the signal. The distance was 4455 kms which is pretty impressive for 2-metres.

ZOOM presentation about the SAQ LF transmitter in Sweden coming up on Tues 20th Oct 2020

The SAQ station in Sweden is a low frequency radio station that uses a mechanical alternator to transmit on 17.2 kHz. This was established back in 1924 to send telegram traffic across the Atlantic to North America.

It is a listed UNESCO site and it sends out a special transmission on this very low frequency twice a year.

On Tuesday Night 20th October 2020, South Dublin Radio club will be hosting an online meeting on ZOOM at 8pm (19:00 UTC). During it, Ola Hervall from Sweden will give a virtual tour & presentation of the SAQ station.

For  access to the ZOOM meeting, South Dublin Radio Club can be contacted here... https://southdublinradioclub.weebly.com/contact.html

Videos from the 2020 RSGB Convention

Due to the ongoing COVID-19 pandemic, the annual RSGB convention was held online on the 10th of October 2020. They had two video streams going for 8 or so hours which contained talks on a wide number of subjects.

* * * * *

Video stream 1... 

An introduction to... This video stream is aimed at beginners and the timeline for the videos is shown below.

17:30 - Keynote address: Eric Swartz, WA6HHQ - From the K2, and a box of parts, to the technology and key features the K4. A behind-the-scenes look at a 22-year adventure of hard work, luck, technology and excitement at Elecraft. (Interesting look at the history of Elecraft. The main presentation is up to 52:15. Q&A lasts until 1:07:00)

1:14:20 - The small station: Joe Chester, M1MWD.
2:14:00 - Turning amateur radio into an adventure Kevin Richardson, G0PEK and Lauren Richardson, 2E0HLR
3:14:15 - The magic of six metres Chris Deacon, G4IFX
4:14:00 - How to get the most out of your dealer for your part-exchange Martin Lynch, G4HKS
5:14:20 - A pictorial introduction to data modes Mike Richards, G4WNC
6:14:10 - Antenna modelling with MMANA-GAL Steve Nichols, G0KYA
7:14:20 - Why radio and weather go together… Jim Bacon, G3YLA 

* * *

Video Stream 2...

Learn more about …This second video stream is aimed at a more experienced audience.

18:00 - Keynote address: Eric Swartz, WA6HHQ - From the K2, and a box of parts, to the technology and key features the K4. A behind-the-scenes look at a 22-year adventure of hard work, luck, technology and excitement at Elecraft. (Interesting look at the history of Elecraft. The main presentation is up to 52:45. Q&A lasts until 1:07:30)

1:15:30 - QRO Magnetic Loop Antennas Rael Paster, M0RTP
2:15:00 - VHF propagation and weather Jim Bacon, G3YLA
3:15:00 - Having fun with HF contesting Olof Lundberg, G0CKV
4:16:00 - Ionoscatter on 50 and 144Mhz Palle Preben-Hansen, OZ1RH
5:15:00 - VHF/UHF radios for contesting and DX-ing Alwyn Seeds, G8DOH
6:15:00 - DSP: Underlying Concepts William Eustace, M0WJE
7:18:30 - Take your CW to the next level Bruce Pea, N9WKE

EI DMR registrations at the end of Q3 2020

 

The above chart shows the number of DMR (Digital Mobile Radio) registrations by EI stations for every quarter up to the end of Q3 2020. The first DMR numbers were issued in 2015 and this peaked with a surge of interest in 2017. After that, the number of registrations per year slowed and dropped by about 30% to a lower level.

It now looks as if 2020 has seen a rebound in the registration numbers with the numbers at the end of Q3 2020 already ahead of the total for 2019.

The first quarter of 2020 had 19 new registrations but 10 of these were for club call signs which will probably never be used. The second and third quarters were for individuals and show a renewed growth in interest and numbers. Even if the club calls are removed, it looks likely that 2020 will end up as the second highest year yet in terms of new DMR registrations.

As of the end of Q3 2020, a total of 229 DMR numbers were issued for EI calls. If the club calls and duplicates are removed then 192 individual EI stations have DMR numbers.

Change of Irish Coast Guard Frequencies

 

This might be of interest to anyone who monitors or listens to traffic on the Marine VHF band.

The channels / frequencies for the Irish Coast Guard in the locations shown above are changing during the period of the 6th of October to the 14th of December 2020.

Video about EIRSAT-1: Ireland’s first satellite (NOT AMATEUR RADIO RELATED)

EIRSAT-1 is Ireland’s first satellite and a team of students in University College Dublin (UCD) are designing, building, testing and will launch this satellite as part of the European Space Agency (ESA) Fly Your Satellite! Programme.

EIRSAT-1 stands for the Educational Irish Research Satellite 1. It is a satellite about the size of a shoe box, called a CubeSat and will be controlled from a ground station on the roof of the UCD School of Physics and collect data from the three science experiments on-board.

The first experiment is a novel gamma-ray detector, GMOD, which is being developed in UCD. GMOD will detect gamma-rays from both cosmic and atmospheric phenomena. 

The second experiment, EMOD, consists of a payload developed with Irish company, ENBIO Ltd., to monitor the in-flight performance of their thermal spacecraft treatments, SolarWhite and SolarBlack. 

The third experiment, Wave Based Control (WBC), is a novel attitude control algorithm, developed in the UCD School of Mechanical and Materials Engineering, which will be tested for the first time in space on EIRSAT-1.

The satellite was due o be delivered to the European Space Agency (ESA) in 2020 but this will probably be delayed due to the COVID-19 pandemic. Once launched, it is expected to last 6 to 12 months.

The video below gives a good overview of the project...

Some RF info...

On-board Communications: The on-board CMC (Common Mode Current) transceiver is the space-qualified CPUT VUTRX transceiver supplied by ClydeSpace. The communications system uses UHF downlink (430-440 MHz) and VHF uplink (140-150 MHz) bands. The transceiver provides 9600 baud downlink and 1200 baud uplink, and implements a GMSK downlink and AFSK uplink configuration. The AX.25 protocol is used for uplink packets, while a CCSDS convolutional encoder may be used for downlink. 

ADM (Antenna Deployment Module): EIRSAT-1 will use a custom ADM designed and built at UCD which will be mounted on the -Z end of the satellite deploys two dipole antennas, one for UHF downlink and one for VHF uplink. Both dipoles are composed of two tape spring antenna elements, deployed from opposite sides of the module, as seen in many previous and COTS antenna designs. The elements are 5 mm wide, made from a Copper Beryllium alloy and attached to spring loaded doors at each side of the module. They are coiled inside the ADM before deployment, within the 7 x 100 x 100 mm overall dimensions of the module. When EIRSAT-1 is clear of the CubeSat deployer the ADM will activate a burn wire release mechanism allowing the module doors to open and the elements to uncoil into their operational positions and stay in that configuration for the remainder of the mission.

Links...
a) Info on the UCD website

b) Press release on the Irish Research Council site

c) EIRSAT-1 website

d) Specifications

Radio amateurs in the USA to lose the 3.4 GHz microwave band

 

In a ruling issued on the 2nd of October 2020, the Federal Communications Commission (FCC) in the USA announced that the amateur radio service is going to lose access to the 3.4 GHz microwave band. It is proposed that the spectrum from 3.3 to 3.55 GHz be cleared for 5G networks.

Up to now, radio amateurs in the US had a secondary allocation from 3.3 to 3.5 GHz based on a non-interference basis to primary users. The FCC have now proposed clearing 3.4 to 3.5 GHz in the short term and 3.3 to 3.4 GHz at a later date.

Excerpt from the ruling regarding the amateur allocation...