| |
G4TNU > NEWS 11.05.25 02:45l 279 Lines 13533 Bytes #999 (0) @ EU
BID : 56183G4TNU
Subj: RSGB Main News - 11 May 2025
Path: IW8PGT<IZ3LSV<IK6IHL<IK7NXU<HB9ON<DK0WUE<PI8ZTM<PI8LAP<PD0LPM<IR0AAB<
I0OJJ<I0OJJ<GB7CIP<GB7CIP<GB7CIP
Sent: 250511/0026Z @:GB7CIP.#32.GBR.EURO $:56183G4TNU
>From g4tnu%gb7cip.#32.gbr.euro@i0ojj.ampr.org Sun May 11 02:30:42 2025
Received: from i0ojj.ampr.org by i0ojj.ampr.org (JNOS2.0p.8) with SMTP
id AA17031633 ; Sun, 11 May 2025 02:30:42 +0200
Message-Id: <56183G4TNU@i0ojj.bbs>
>From: g4tnu@gb7cip.#32.gbr.euro
X-JNOS-User-Port: Telnet (i0ojj @ 44.134.109.10) -> Sending message
T:From: G4TNU@GB7CIP.#32.GBR.EURO <g4tnu@gb7ipf.ampr.org>
T:Newsgroups: ampr.news.europe
T:Message-Id: <E1_2319700_G4TNU@gb7ipf.ampr.org>
GB2RS Main News for Sunday the 11th of May 2025
The news headlines:
* The RSGB EMC Committee has updated leaflets on mains wiring
and earthing requirements
* Last chance to apply and be part of the RSGB team at YOTA in
Paris
* Help the RSGB celebrate International Women in Engineering Day
The RSGB EMC leaflets on mains wiring and earthing requirements have
been updated by the EMC Committee to reflect the latest version of
"Part P" of the Building Regulations for England and Wales. Part P
deals with electrical safety in domestic homes. There are two
leaflets, a basic version and an advanced version, and both are
available to download from the RSGB website. Go to rsgb.org/emc and
select ‘EMC Leaflets' from the menu located on the right-hand side.
Choose the "EMC Leaflet 7: Earthing and the radio amateur" links. You
will also find many other resources on the same web page that will
help you deal with a wide range of EMC problems.
Time is running out to apply and be part of the RSGB team going to
France for this year's Youngsters On The Air Summer Camp. The camp
takes place between the 18th and 25th of August near Paris and is a
chance of a lifetime for young RSGB members to represent their
country and their national society. If you are aged between 16 and 25
and are passionate about amateur radio, then the RSGB would love to
hear from you. The deadline to apply is Friday the 16th of May.
Don't delay, apply now by going to rsgb.org/yota-camp
The RSGB is celebrating International Women in Engineering Day on the
23rd of June. The day celebrates the amazing work of women engineers
across the globe. We know that amateur radio is a great foundation
for careers in Science, Technology, Engineering and Maths. This year,
the Society would love to share stories of how amateur radio has
helped female engineers in their careers, as well as being an
enjoyable part of their lives. If you are a woman working in any
engineering sector, or know someone who is, the RSGB would like your
help to inspire future generations of girls and young women. It
doesn't matter whether you are established in your career, just
starting out or even still studying. Stories, along with a photo,
should be sent to comms<at>rsgb.org.uk by the 26th of May. This
event contributes to the RSGB's Growth strategic priority by helping
to reach new audiences.
Members of the RSGB HQ Team and RSGB volunteers will be attending the
Dayton Hamvention between the 16th and 18th of May. Held at the
Greene County Fairground in Xenia, Ohio, USA, the event is one of the
world's largest amateur radio gatherings and attracts radio amateurs
from around the world. If you are attending, make sure you pop along
to stand numbers 2305 and 2405 to say hello and ask the RSGB about
digital membership. Find out more about the Dayton Hamvention by
going to hamvention.org
Don't forget that the next RSGB Tonight<at>8 webinar is tomorrow,
Monday the 12th of May. Dr Nathaniel Frissell, W2NAF and RSGB
Propagation Studies Committee member Gwyn Griffiths, G3ZIL will
present "Ham Radio Science Citizen Investigation: Space Weather We
Can Do Together". The talk will cover some of the key findings of
recent HamSCI research, what's next for the organisation, as well as
how you can take part. The webinar will be livestreamed on the
Society's YouTube channel and special BATC channel, allowing you
to watch and ask questions live. Find out more by going to
rsgb.org/webinars
Please send details of all your news and events to
radcom<at>rsgb.org.uk The deadline for submissions is 10am on
Thursdays before the Sunday broadcast each week.
And now for details of rallies and events
The Barry Amateur Radio Society Rally is on Saturday the 17th of May
at Sully Sports and Social Club, South Road, Sully CF64 5SP. There is
a large free car park on site. Admission is GBP 3. Doors open to
traders at 8am and to the public from 9.30am. Traders and exhibitors
can call Nigel, GW1CUQ via 02920 892580 for further information. For
general enquiries please ring Steve, GW5VOG via 07900 560080 or email
s.cawsey<at>sky.com
The Dunstable Downs Radio Club will be holding its Annual National
Amateur Radio Car Boot Sale at the usual venue, Stockwood Park in
Luton, on Sunday the 18th of May. Excluding a break for Covid-19,
this is the 40th consecutive year that the event has been run. For
further information go to ddrcbootsale.org
The West of Scotland Braehead Radio Rally is on Sunday the 18th of
May at Braehead Arena, 150 Kings Inch Road, G51 4BN. The venue is
just off the M8 and has free parking all day. It also has great bus
links with Glasgow, Paisley and Inverclyde. Entry is GBP 4. Doors are
open between 10am and 4pm. There will be hot food and drinks
available, and a licensed bar. There will be over 50 tables of
traders and club stands as well as a Bring-and-Buy and an RSGB Book
stand. For further information go to braeheadradiorally.com
The Lough [Loch] Erne Amateur Radio Club 41st Annual Radio Rally is
taking place on Sunday the 18th of May at Share Discovery Village,
221 Lisnaskea [LUHZ-NA-SKEE] Road, Lisnaskea, Enniskillen, BT92 0JZ.
There will be the usual facilities, food and drink, and a
Bring-and-Buy. Doors open at 9am to traders and 11am to the general
public. Entry is GBP 5 and includes a draw ticket. To arrange a
table, please contact Alan via argault91<at>gmail.com
Now the Special Event news
Special event station GB0SAR is active until the 30th of May to
support SOS Radio Week. The station will mostly be working using FT4
on the 20m band, but you might also catch it on the other HF bands
using phone. For more information visit QRZ.com
Humber Fortress DX Amateur Radio Club will be operating special
callsign GB0MMH to raise awareness of men's mental health. Other
special callsigns will also be active. The station will be active
throughout the weekend of the 17th and 18th of May, and also of the
21st and 22nd of June. Please listen out for the operators and give
them a call. Your support will help to raise awareness of the
important issue of men's mental health. If you would like further
information, please contact secretary<at>hfdcarc.com
Now the DX news
Roberto, IW7DEC will be active as PJ2/IW7DEC from Curacao
[KYOOR-UH-SOW], IOTA reference SA-099, until Wednesday the 14th of
May. He'll be active on 40m to 20m, FT8 and SSB. QSL available via
his home call and Logbook of the World.
Yuris, YL2GM continues to be active as ZS8W from Prince Edward and
Marion Island, IOTA reference AF-021, until Friday the 16th of May.
Yuris will be on Marion Island as a radio engineer and member of the
SANAP station communication equipment maintenance team, and he hopes
to find good periods of time to be operational.
A team of five Italian operators is active from the Republic of
Kosovo until Saturday the 17th of May. The operators will be active
as Z68TT on CW, SSB and RTTY, and as Z68ZZ on FT8. QSL is available
via OQRS and Logbook of the World.
Now the contest news
Today, Sunday, the 11th of May, the UK Microwave Group
Millimetre-wave Contest runs from 0900 to 1700UTC. Using all modes on
24, 47 and 76GHz frequencies, the exchange is signal report, serial
number and locator.
Also on Sunday the 11th of May, the 70MHz CW Contest runs from 0900
to 1200UTC. Using CW on the 4m band, the exchange is signal report,
serial number and locator. UK stations also send their postcode.
Tomorrow, Monday the 12th of May, the 80m Club Championship runs from
1900 to 2030UTC. Using SSB on the 80m band, the exchange is signal
report and serial number.
On Tuesday the 13th of May, the 432MHz FM Activity Contest runs from
1800 to 1855UTC. Using FM on the 70cm band, the exchange is signal
report, serial number and locator.
Also on Tuesday the 13th of May, the 432MHz UK Activity Contest runs
from 1900 to 2130UTC. Using all modes on the 70cm band, the exchange
is signal report, serial number and locator.
On Wednesday the 14th of May, the 432MHz FT8 Activity Four-Hour
Contest runs from 1700 to 2100UTC. Using FT8 on the 70cm band, the
exchange is report and four-character locator. Also on Wednesday, the
14th of May, the 432MHz FT8 Activity Two-Hour Contest runs from 1900
to 2100UTC. Using FT8 on the 70cm band, the exchange is report and
four-character locator. Stations entering the four-hour contest may
also enter the two-hour contest.
On Thursday the 15th of May, the 70MHz UK Activity Contest runs from
1900 to 2130UTC. Using all modes on the 4m band, the exchange is
signal report, serial number and locator.
Now the radio propagation report, compiled by G0KYA, G3YLA and G4BAO
on Thursday the 8th of May 2025
Active region 4079 turned out to be not quite so bad as we had
predicted. The sunspot was large, about ten times the width of our
Earth, so we expected it to be more active. It was regions 4081 and
4082 that produced most of the flare activity last week.
Two filament eruptions also occurred within two hours of each other.
The first event began at 16:20UTC on the 6th of May in the southern
hemisphere and was responsible for a plasma wave across the surface
of the Sun.
The second filament eruption began in the northern hemisphere around
17:50UTC to the north east of AR 4079. A large amount of plasma was
flung to the north. The filament eruptions on Tuesday the 6th of May
did produce coronal mass ejections, but an Earth-directed component
was not apparent. So we dodged a bullet!
The solar wind speed remained high for most of last week which didn't
help propagation. It did help to push the Kp index to five across the
weekend of the 3rd and 4th of May. Things were more settled later in
the week. On Thursday the 8th of May the solar wind speed was down to
around 500 kilometres per second, the Kp index was three, but MUFs
over a 3,000km path were still down at about 20MHz.
An Earth-facing coronal hole may add to the solar wind this weekend,
the 10th and 11th of May. It looks like summer HF propagation is
kicking in, with lower MUFs during the day but higher ones at night.
Next week, NOAA predicts that the SFI will be in the range 155 to
165. Settled geomagnetic conditions are forecast for the beginning of
this coming week but unsettled geomagnetic conditions are expected
for the 16th to the 19th of May. At that point we could see the Kp
index rise to five again, coupled with poorer propagation and reduced
MUFs.
And now the VHF and up propagation news from G3YLA and G4BAO
Tropo has been a key propagation mode during the previous couple of
weeks, but there have been variations in the location and timings of
these conditions.
Sometimes this will be due to increased moisture below the
temperature inversion, so although the cloudier areas have been cool,
they have probably done better for Tropo.
This is due to the improved quality of the inversion, which performs
better when there is a big moisture contrast across it, as you find
with these layers of cloud.
Otherwise, we find the better conditions are driven by night-time
cooling, forming a low inversion near the ground which tends to
disperse during the morning as the Sun warms it away. This should
still be beneficial for the 70cm UK Activity Contest on Tuesday the
13th of May over eastern areas, but perhaps less so farther west.
Good conditions will last into next week, but not everywhere. The
main change will see an area of showery rain, possibly thundery,
moving north into western Britain this weekend and perhaps some
central areas early next week. This raises the prospect of some GHz
band rain scatter in the west.
The Eta Aquariids meteor shower peaked last week. In the decaying
tail of activity, together with other lesser showers, this should
keep an enhanced meteor input for the coming week.
The Sporadic-E season typically runs from May to mid-September and
the daily jet stream blogs have started on www.propquest.co.uk.
As usual, the main season offers two periods of activity, one in the
morning and the second from late afternoon to the evening. Remember
Es is not guaranteed since it depends upon many factors, but jet
streams help, and these are shown on the website maps. Use the map
clusters to find out where any activity is starting on 10m and then
follow it up in frequency through the lower VHF bands.
EME path losses are at their maximum but falling after apogee on
Friday the 9th of May. Moon declination is negative, reaching minimum
this coming Thursday, so we'll have very short Moon windows and low
peak elevation. 144MHz sky noise is moderate, increasing to high by
next Friday.
And that's all from the propagation team this week.
And that's the end of the main news for this week prepared by the
Radio Society of Great Britain. Items for inclusion in subsequent
bulletins can be emailed to radcom<at>rsgb.org.uk to arrive by
10:00 on the Thursday before transmission.
Read previous mail | Read next mail
| |
