Showing posts with label 28MHz. Show all posts
Showing posts with label 28MHz. Show all posts

Friday, January 19, 2024

2024 10m QRSS Challenge: - TF3HZ 18th Jan


As part of a challenge for 2024, I've decided to see how many QRSS signals I could capture on the 28 MHz band during the year. On the 18th of January, I managed to get a good capture of TF3HZ in Iceland.

On the 17th of January, I had seen the QRSS signal of TF3HZ in between G0MBA and G0PKT so I knew where to look. on the 18th at 12:14 UTC, the signal appeared out of the noise.

This is a good example of how useful QRSS is in that you can 'see' the propagation changing. It shows how within the space of a minute, the path between Ireland and Iceland opened up.


In the next cycle, I got a nice strong QRSS signal and screengrab for TF3HZ.

The path distance was 1576kms so it's hard to know for certain what the propagation mode was. Was it F2 layer? Was it some mid-Winter Sporadic-E? The sudden appearance of the signal is very similar to a lot of the QRSS signals I have seen during the Sporadic-E season but it's not conclusive evidence. I think it's just one of those cases where no-one can be certain which of the propagation modes it was.



In summary... That brings the QRSS tally so far for 2024 up to 9-callsigns & 6 DXCC.

1) 08 Jan 2024: VE1VDM - DXCC #1
2) 10 Jan 2024: VA1VM
3) 15th Jan 2024: G0MBA - DXCC #2
4) 15th Jan 2024: G0PKT
5) 15th Jan 2024: AE0V - DXCC #3
6) 16th Jan 2024: RD4HU - DXCC #4
7) 16th Jan 2024: W1BW
8) 17th Jan 2024: OH5KUY - DXCC #5
9) 18th Jan 2024: TF3HZ - DXCC #6

Sunday, November 26, 2023

28 MHz Summits on the Air Challenge for 2024


One of the popular amateur radio award programmes is Summits on the Air (SOTA) and it's relatively easy for people to activate a peak as opposed to going to some exotic DX location.

Andy, MM0FMF has announced a new SOTA Challenge for the 28 MHz (10m) band for all of 2024. It's nice to see a specific challenge for the 10m band and hopefully, it will generate some more activity on this band now that we're near the peak of the solar cycle.

2024 10-metre SOTA Challenge 

Andy MM0FMF writes... "Back in 2013/2014 we were coming to the top of Cycle 24 and we decided to have a challenge. The aim was to encourage activity on the 12m band. I chose 12m for a few reasons, it has almost identical propagation to 10, there’s no contests, it was a very underused band in SOTA, I could fit a 12m 1/4GP on my fibreglass pole. The last was important, I didn’t need to spend any extra money :wink: Huge fun was had by people who took part, much DX was worked. My most memorable QSOs were random chases by VK stations to the UK at lunchtime rather than greyline.

So now Cycle 25 it starting to show it means business and we enjoyed just how much fun can be had on the higher bands in the recent NA<>EU S2S activity day when the Sun produces SFI figures around 150 and we get people organised to be on the air at the same time.

It’s the right time to run another challenge. We’ve done 12m and we didn’t pick it again because we try to be inclusive on SOTA and I didn’t check 12m allocations worldwide last time. Not every licence class gets access to 12m, in some countries only the top licence types get access. But on 10m the situation is very different with most licence types giving some or complete access, more people can take part than on 12m.

The aim of the challenge is to get everyone using 10m a lot. Since 2013 we have added 95 new associations with many in South America, Asia and the Caribbean. So now there should always be DX for someone workable :o) (Don’t forget, EU is DX for some!)

Andy, MM0FMF activating a SOTA summit

Scoring will be done automatically by the database software. You just need to enter your activations and chases as normal, the software will note 10m QSOs and score them according to the rules below. Normal SOTA rules apply so if you do a multi-band activation, just enter it as normal and your normal SOTA results get updated and qualifying 10m QSOs get scored completely separately.

There will be a special 10m Challenge results page. But note, lots of you said you don’t want SOTA contests and we listened. There will not be an overall winner or association winners. The challenge results pages will be sorted alphabetically by callsign and you will be able to see how well you are doing . If you want you can compare your results with others to see if your equipment is as good or if you get a better score per activation etc. A certificate will be available showing your name, call, association and score.

The challenge runs from 0000Z January 1st 2024 to 2359Z December 31st 2024

Scoring for chasers:
For every unique summit you chase on 10m you get a multiplier.
For every unique activator you chase you get 1 chaser challenge point.
Your final score is chaser challenge points * multipliers.

Scoring for activators:
For every unique summit you activate on 10m you get a multiplier.
For every unique chaser you work you get 1 activator challenge point.
Your final score is activator challenge points * multipliers
."


For more information about the Summits on the Air award programme, go to https://www.sota.org.uk/

Wednesday, January 26, 2022

Tracking a German Polar Research Ship on 28 MHz - Dec 2021 & Jan 2022


For the last few weeks, I have left my HF radio on the 10m WSPR frequency of 28.1246 MHz and any signals I decode are uploaded automatically to the WSPRnet website.

One of the more unusual signals that I have heard over the last few weeks was DP0POL, the WSPR station on the German polar research vessel Polarstern.

I first noticed this when it was off the west coast of Africa. Between the 22nd of December 2021 and the 3rd of January 2022, I heard the 5-watt signal a total of 39 times. The distances range from 5116 kms to 9705 kms.


I remember checking this a few weeks back and there were no earlier reception before it was off the west coast of Africa. Possibly, it was inside the F2 layer skip zone for me when it was further north.

Back in May of 2021, I was able to track the same ship on 28 MHz as it made its way through the North Sea.

Tuesday, March 7, 2017

F2 Opening on 28 MHz to Africa on Wed 1st March 2017


With the Solar Flux Index down around 75, the 10 metre band is more or less dead every day at the moment. It was a bit of a suprise on the 1st of March 2017 when signals from Africa appeared on the band.

The first signal I heard was TR8CA in Gabon on 28 MHz SSB and later on 29 MHz FM. This was followed soon after by S01WS in the Western Sahara who I worked on cw.


I could hear these stations working plenty of Europeans and Americans so it was obviously a good opening. When I saw TR8CA being spotted by LA and SM stations in Norway and Sweden, then I knew something really unusual was happening. I suspected some sort of pre-auroral enhancement and the RSGB news a few days later confirmed this...

We were pleased to get the HF propagation prediction pretty much spot on last week. While Monday and Tuesday were reasonably settled, Wednesday saw the effects of solar material from a large coronal hole as it hit the Earth. The K-index leapt to five around lunchtime and there were reports of HF openings up to 10 metres. This was probably a pre-auroral enhancement, but it didn’t last too long.

This is what the K index looked like just before and after the event...


As you can see, nice and low early on the 1st of March and then the K index climbs to 7.

As is common with these type of events, the HF bands were very poor in the following days with 18 MHz just about open. 21 MHz and 28 MHz were dead.

The map below shows TR8CA and S01WS in relation to my location.


S01WS in the Western Sahara was about 2,900kms and the ideal distance for one hop F2 propagation on 28 MHz. TR8CA at about 6000kms was probably 2 x F2 layer hops so it was an interesting one to hear.

The thing about the 10 metre band is that you can never be too sure when it will open. When the Solar Flux Index is down around 70-80, it should be closed but then events like this allow the band to open, especially on North-South paths.

Tuesday, December 6, 2016

FY5KE worked on 10 metres

I had a listen to the 10 metre band late this afternoon and I noticed some weak cw beacons around 28.204 / 28.205 MHz. They were very weak but I could just make out the N3 callsign and the FN in the locators which meant the band was open to North America. Some F2 propagation at last!

I had a look on the DX Cluster and it was quiet enough. I noticed that FY5KE had been spotted on 28.030 MHz. When I listened, sure enough he was there but he was very weak. He was calling CQ a lot so it wasn't like he had a pile up.

I heard EI4KN call and work him with ease. Ronan is in Cloughjordan on the Tipperary / Offaly border, about 120kms to the north. That's a nice distance for a direct path on 10m. I don't believe it was backscatter as the band wasn't that good.

I had a look around the band and it was pretty quiet. Went back to 28.030 MHz and just left the rig there. After about 10 minutes, he came up out of the noise and I worked him first call with about 50 watts.

My first QSO on 28 MHz since I put the antenna up back in mid-November. It was also my first contact on 28 MHz since October 2012.

It was only later that I realised that FY5KE is actually at the Space Centre in French Guyana.

I had a look around the band and it seemed dead. I put the rig on WSPR and FY5KE popped up there as well.


It was hardly a huge opening but interesting all the same.

Sunday, November 20, 2016

GB3RAL on 28 MHz via Meteor Scatter

On Friday the 18th of November, I had the rig turned to 28.2150 MHz, the frequency of the GB3RAL 10 metre beacon in the UK.


I was using Spectrum Lab on the PC with the microphone resting on top of the HF rig....an easy way to monitor a frequency while working away on something else. If there is anything there buried in the noise, it will usually show up on the screen.

I've listened to this back in 2008 and found it hard to get a positive ID. It seemed to be just a carrier without any CW.

This time around, I got 'AL' on cw within about 20 minutes so I knew I was hearing it. There were plenty of pings over the space of an hour and then at about 10:28 UTC, I got this fine 4 minute burst...

Right hand side shows the audio freq in Hz.

The tone was easy to hear at times as it transmitted "GB3RAL IO91IN". It certainly wasn't a huge signal...maybe 419 at best but clear all the same.

I'd imagine it would have been really easy to make a contact on a digital mode like JT65.

It was only afterwards that I noticed that the Leonid meteor shower peaks on the 18th of November so perhaps it was due to one of those.


On a positive note, it's good that the new 10 metre vertical seems to be working well.