It’s the Autumn Junk Sale next meeting (Thursday 25th October)!

Please bring along any unwanted broadly tech based items in order to support the club. RF based junk is always very desirable. Also bring
your cash along buy -er- lots of useful stuff!

Venue: Woodford Park, Woodley as usual. The auction will start 8pm sharp so it’s best to arrive early (eg. 7:30pm) to have a look at the wares.

Please note a couple of things:
* If you successfully bid on something, you’ll need to wait until the
end to settle up.

* If you bring junk along and it doesn’t sell then please be prepared to take it home with you.

Also please read the rules below.

If you have not been before – it’s a hoot. It is an auction run by the
club’s very own top auctioneers/jesters. Even if you don’t wish to buy,
the evening is always entertaining.

Prices tend to be extremely affordable – much better than rallies, for
example.

73

John
G4RDC

RADARC Junk Sale Rules

1. All buyers must be in possession of a bidding number before the auction starts. Non-Members will be required to either join the Club or pay a fee (£2) for this number. Registering for a bidding number implies acceptance of these rules (Non-members bringing material for sale for club funds are admitted free);

2. On completion of a sale, the purchaser must make clear their number and the price paid before taking the goods;

3. Viewing is only allowed up until the point the meeting begins. Following this, all purchasers must keep away from the main selling area in order to allow the event to proceed in an orderly manner. Under no circumstances will bidders be allowed to view articles which are in the process of being sold;

4. It is assumed that all goods are sold for the benefit of the Club. For any person who wishes to have an item sold on their behalf, the Club charges a 10% commission. In the case of non-members, a minimum fee of £5 applies. The fact that it is a commission sale and the name / callsign of the beneficiary must be made clear by a label attached to each item;

5. In the event of item 4 not being satisfied, the Club will retain all proceeds of the sale;

6. Any reserve price, whether for a commission sale or not, must be made clear before the auction starts by means of a label attached to the item. Otherwise it will be for the auctioneer to make whatever price they can for the article;

7. For a commission sale (item 4) or with reserve (item 6) it is in the interest of the seller to ensure that the auctioneer is aware of this fact prior to the sale;

8. Settlement of bidders and sellers fees will only occur after the auction of all items ends. Attendees who cannot wait until the end of the auction should nominate someone who can settle on their behalf after the auction of all items ends.

9. At the end of the event, all unsold goods must been removed by the person who brought them;

10. The auctioneer’s decision is final;

11. All good are sold “as seen”

12. Caveat Emptor!

Folks,

Dr. Elizabeth Bruton is back with us again to kindly give us a talk
entitled “Mr Marconi and his marvellous invention: Maritime wireless telegraphy from the Kingstown Regatta in 1898 to the sinking of the Titanic in 1912 and beyond.”

Peter G4JNU with David M0DHO’s help will also demonstrate a Marconi detector in action.

Venue: Woodford Park, Woodley
Time: 8pm

In the aftermath of the sinking of the Titanic in 1912 and the
subsequent enquiry, the then-Postmaster General Herbert Samuel publicly declared: “Those who have been saved, have been saved through one man, Mr. Marconi … and his marvellous invention.” But what were the origins of this “marvellous” and life-saving invention and what impact did it have on maritime safety? From young Italian inventor Guglielmo Marconi’s world’s first of live event reporting by wireless at the Kingstown (now Dun Laoghaire) Yachting regatta in July 1898 through to Marconi’s experiments at Crookhaven between 1901 and 1914 and hence to the vital, life-saving use of Marconi wireless telegraphy on board the Titanic in 1912, this illustrated talk will uncover the practical and commercial application of wireless telegraphy for the maritime world and its potential impact upon maritime safety in the twentieth century.

Dr Bruton is Curator of Technology and Engineering at the Science
Museum, London specialising in communications. Previous roles include Heritage Officer at Jodrell Bank Discovery Centre, University of Manchester; Co-curator and researcher for the Heritage Lottery Fund (HLF) project and exhibition ‘Dear Harry: Henry Moseley, a scientist lost to war’ at the Museum of the History of Science, Oxford; and postdoctoral researcher for AHRC-funded project ‘Innovating in Combat: Telecommunications and intellectual property in the First World War’ at the University of Leeds. She was one of the 2014-2015 Marconi Byrne-Bussey Visiting Fellow at the Bodleian Library, University of Oxford and also catalogued and researched the Marconi Collection at the Museum of the History of Science, Oxford.

In case you haven’t seen her before, she is also a brilliant speaker and
communicator.

Tea, coffee and biscuits will be in abundant supply.

73

John
G4RDC

Folks,

Thanks to Michael M0MPM, we have a talk entitled “An Introduction to 3D Printing for the Radio Amateur” by James Patterson, M1DST.

Date: Thursday 27th September
Venue: Woodford Park Leisure Centre, Haddon Dr, Woodley, RG5 4LY
Time 8pm.

From James:

“We will introduce you to the fascinating world of 3D printing where we will learn about the different 3D printing methods with a focus on
inexpensive FDM machines. You will leave with an understanding of how the machine works and how 3D printing can be used as a tool to improve your Amateur Radio life. We will discuss the tools used to take an idea from your head to become a finished item.”

Refreshments available as usual.

Looking forward to seeing you there.

73

John
G4RDC

Next meeting Thursday 13th September, Woodford Park Leisure Centre, Haddon Dr, Woodley, RG5 4LY.

In the words of the great NGX, Eyes down 8pm.

With a huge thankyou to Ian 2E0DII, to kick off the Autumn season we welcome Prof. Bob Lambourne with a talk entitled “The Speed of Light”.

Bob says: “As a title I should like to speak about ‘The speed of light’. This will enable me to combine a number of topics that might be of interest to Radio Club members, including some historical info about James Clerk Maxwell and Oliver Heaviside. Since 1983 the speed of light (and of radio waves!) in a vacuum has been defined to be exactly 299 792 458 m/s.

This talk will examine the story of how the speed of light made the transition from a measurable speed, with a value that could be determined experimentally, to a quantity of such fundamental and practical importance that the decision was made to assign it an explicit and exact value that would put it beyond future measurement.  Along the way there will be a discussion of why the speed of light represents a local speed limit in Einstein’s special theory of relativity, even though many faster than light phenomena are easily demonstrated. According to currently favoured theories, all sufficiently distant galaxies are moving away from us at more that 1 light year per annum; consequently, after less than 14 billion years of cosmic expansion, the edge of the observable universe (the cosmic horizon) is at a distance of about 46 billion light years – a neat trick in a universe limited by light speed travel! ”

James Clerk Maxwell, for me, is the patron saint of radio. A truly beautiful mind. He mathematically worked out how electricity and magnetism work together to produce our beloved electromagnetic waves.

Bob Lanbourne is Professor of Educational Physics art the Open University and Director of Studies in Physical Sciences at the Oxford University Department for Continuing Education. He was born and brought up in Reading but attended university in London, where he took a BSc in physics and a PhD in theoretical particle physics. His first university teaching post was in Durham where he taught the Maths Honours module in general relativity and cosmology. He has worked at the Milton Keynes campus of the Open University for over 40 years, where his roles have included three years as Head of the Department of Physics and Astronomy, and five years as National Director of the Physics Innovation Centre for Excellence in Teaching and Learning (piCETL). His work outside the OU has included periods as Senior Vice-President of the Institute of Physics, Chair the the Physics Education Division of the European Physical Society, and Chair of the International Commission on Physics Education, one of the Commissions of The International Union of Pure and Applied Physics.