John G3VHH notes we have a new 4 metre web SDR available to us covering 69.492 – 71.028 MHz
IP address may change so look at http://websdr.org/ for a definitive address. Text is “4 Meter WebSDR Located in south Hartfordshire UK using a RTL Dongle”. Antenna is a 4 metre quarter wave ground plane.
Many thanks to John and Steven M0XVT for making this available.
With a very heavy heart, I must report that Peter G4JNU died peacefully on Sunday 23rd December.
Peter was held in the highest regard by everyone who knew him. Here are just a few of the tributes:
“As usual I had an amazing demo of a magnificent piece of early 30 line TV equipment he had been working on” – Vin, G4JTR
“Terribly sorry to hear about Peter” – Sean, 2E0ZIP
“Very sorry to hear the passing of Pete, we will miss him” – Michael M0MPM
“I also have very fond memories of Peter, G4JNU. He will be remembered for his re-creation of Baird’s mechanical scanning TV system and the transmission by amateur radio to the USA of these images from the Amberley Museum. He has always been a great experimenter and home constructor.” – Harry G3NGX
“What a shock. Such a nice man and regularly saw his car (registration G4JNU of course) parked here in the village, visiting family or out walking.” – Don G3XTT
“What a huge shame. Peter was a stalwart of the club for as long as I can remember. A true gentleman and a real engineer of a kind you so rarely meet. He will be greatly missed.” – Baz G8DOR
“I mourn the passing of a gentleman in every sense of the word. Peter had so much to teach us all. ” – Ray G3SCZ
“Truly a gentleman in every sense and an inspiration to me and many, many more.” – Dave M0PMZ
“I am truly devasted by this news. Pete was a rock at RADARC and had energy and helpfulness which few could match. RIP Peter, I shall miss you.” – Robin G4IWS
“Peter was a master engineer and always ready to lend a helping hand where needed. The equipment he built and demonstrated were an inspiration to us all. A loss to RADARC. RIP Peter.” – Jim G0LHZ
“He was normally an early starter at the rally helping out where ever he could always with a smile and then going on to the club table. At meeting he would busy himself with getting the room ready before chatting to all. I was astonished by his knowledge on mechanical TV and was able to help him with a presentation he was doing. He gave more than he took.” – Min G0JMS
“A very sad loss. I have many fond memories of Peter over the many years that I have known him. A great enthusiast for all thigs radio and mentor to newer members of RADARC. RIP Peter” – Andy M5ALG
“I never heard Peter complain or judge any one, he always came to the Club Meetings with warmth and a smile. Following on from Min’s comments may I add the tables for the sound and projector were always in place in ample time for the AV. set up . He braved the pull up/fall down finger crushing screen on many occasions! Peter was a regular for NFD set up and tear down and the McMichael junk sale tables , in mature years struggling valiantly with heavy boxes and boat anchors. In memory of a true gentleman. Sadly missed” – Graham G3XYX.
“I always remember the first time I entered a construction contest and thought I was in with a chance with my MSF clock… only to have Peter lift a large box off of his built-from-scratch replica of a Baird televisor which immediately dashed everybody else’s chances. His knowledge of original TV systems led to him making things for a BBC programme a few years ago if I recall correctly. Rest in Peace Peter. You will be sadly missed.” – Des, G8FIF
“A sad loss to the club and to amateur radio. Peter had a great depth of knowledge and experience, he was always willing to listen to the other persons point of view and was greatly respected by all.” – Dave G4BOO
I will close by noting Peter was awarded the Bingham Shield at the RADARC AGM for his tireless support for the club and in particular for sorting through and testing hundreds of valves which raised a considerable sum at the McMichael Rally. Most recently he gave a beautiful demonstration of his ‘Marconi Detector’ at Dr. Elizabeth Bruton’s talk in October.
He was thrilled to bits with the award – particularly as it had his name on it. Peter – it’s yours for that and so, so much more.
I consider it a privilege to have known Peter. Brilliant engineer, gentle soul.
The funeral service will be at St Andrews Church, Caversham Heights, on Friday 11th January at 2 pm followed by a wake at a local venue to be decided.
Graeme G4XOF lost his battle with cancer Monday 26th November 2018.
Here he is last June proudly showing me his mobile HF antenna, mobile mount and describing how it can be used very effectively as a base station antenna. Ever the enthusiast.
Sad news and he will be missed with his upbeat attitude on the radio to everybody He made the most out of the time he was given – Min G0JMS.
Still a shock even though I knew about Graeme’s condition. He was such a pleasant and helpful person – Mike G4CDF.
I heard him many times on the local repeaters during my journey to and from work, and his great personality and sense of humour always came bounding over the air waves, often making you laugh out loud. He will be missed. – Simon M0ZSU
Very sorry to hear about Graeme’s passing. A really nice chap to buy a radio from. Honest and very thoughtful. A pleasure to do business with. – Harry G3NGX
In a multi-way QSO, late comers with the same name as established operators, would add a 02 ident to keep things simple for the life of net. I was always touched and humbled by Graeme 2 referring to me with respect for an old timer as Graham 1 whatever the situation, eyeball or net. A font of shared knowledge at the informal Rugger Club gatherings. A help with e-bay bulk purchases saving time and trouble all round for the less adventurous net users . He was dynamic, pushing forward with technology , but always could take time out to explain something I did not grasp about new technology , a true gentleman . A great loss to amateur radio. – Graham, G3XYX.
I didn’t know Graeme well which makes this all the more difficult. I wanted to know him better. It feels like we’ve been friends forever which is a measure of Graeme’s warmth of spirit. We always had a laugh whenever we spoke either on air or in person. That said, Graeme knew his stuff. I affectionately knew him as XON/XOFF (https://en.wikipedia.org/wiki/Software_flow_control). He visited me at home last June where we just talked for 20 minutes or so about 5MHz mobile contacts we’d had, the up-and-coming network radio technology and how he used his mobile HF antenna to great effect mobile and at home. We had a drink or two at Reading Rugby Football Club in Sonning during the summer and the last time I saw him was at the Flight Refuelling rally at Wimborne, Dorset in early August with a number of the RADARC crew where the weather was dreadful but he was chipper as ever. Something to think about, that. A true radio man; one of a kind. I will miss him greatly.
The funeral is on Monday 10th December 3.15pm Reading Crematorium, South Chapel All Hallows Road, Reading, RG4 5LP.
Next meeting (22nd November) Simon Watts G3XXH joins us to give us a brief history of RAF ASV radars from 1940 to 2010. (ASV = airborne surface vessel, radar for maritime patrol aircraft)
Venue: Woodford Park Leisure Centre, Woodley, RG5 4LY
The history of airborne radars developed in the UK for long range
maritime surveillance by the RAF spans from 1940, when ASV Mk. I entered service on Sunderland and Hudson aircraft, through to the 1980s, when the Searchwater radar entered service on the Nimrod MR2. This history came to an end in 2010 when the Nimrod MRA4 programme was cancelled and the Nimrod MR2 taken out of service. The early radars operated at VHF. Following the development of the high power magnetron, operation moved to S-band and then to X band. Searchwater was a complete departure from earlier radars, incorporating a TWT transmitter, modern signal and data
processing and computer control.
This talk will give an overview of the design and evolution of these
radars, the aircraft they were used in and the performance they
achieved, detecting ships and submarines.
Simon Watts G3XXH is Visiting Professor in the department of Electronic and Electrical Engineering at University College London and formerly deputy Scientific Director and Technical Fellow in Thales UK.
Whilst googling ‘ASV’ I found this interesting link:
Min G0JMS also spotted “The Secret of Tuxedo Park” on PBS America talking about the development of radar by Wall Street tycoon Alfred Lee Loomis:
Firstly to Robin G4IWS for hosting yet another successful event.
Also to EVERYONE who entered, but in particular a callout to two first time entrants:
Guy 2E0GDC: “electrical noise detector”
Bernard M0PIK: “Iambic CW Key – Capacitive Touch” (homebrew PCB + surface mount) + inspirational talk on surface mount and making PCBs.
Michael M0MPM: shaver mic adaption. Now, if you google that, you may come up with “pye shaver mic”. Believe me, it wasn’t that. Mike gave us a beautiful light hearted short talk encouraging us to check the legal aspects of using fist mikes whilst mobile. And shavers.
Dave G4BOO: compact MF/HF receiver
Robin G4IWS matchbox sized TTL two tone oscillator
Guy 2E0GDC: electrical noise detector
Mike G4CDF: multiband SHF antenna feed (1.2/2.4) demonstrated using the club’s new spectrum analyser + VSWR bridge.
Bernard M0PIK: surface mount CW paddle circuit and homebrew PCB. (3rd).
Michael M0MPM: shaver mic adaption/hybrid
Jim G0LHZ: remote control ATU (1st)
John G4RDC: FT8 from mc micro taxi radio (2nd)
If I missed anyone or got anything wrong my apologies – let me know and I’ll fix it.
Jim deservedly took first prize and I was very deeply honoured to take second place.
Most importantly we have ideas, enthusiasm and passion for what we do which will undoubtedly result in more developments next year.
I will make sure we have other events during the year where people can share what they are up to.
If anyone has pictures, send them to me and I’ll put them up.
It’s the RADARC Construction Contest on Thursday 8th November!
Venue: Woodford Park
Start time: 8pm
TWO trophies to be won (1st and 2nd prize).
Just bring your “thing” along on the evening in good time (plan to arrive before 7:45pm) to get a place on the tables. If you need the projector (eg. for a video or a software entry) then please let me know.
Depending on number of entries, expect 5-10 minutes or so to present your entry.
Entries so far:
A multiband microwave antenna feed: Mike, G4CDF
Guy 2E0GDC: an electrical noise detector
Bernard M0PIK: CW dual paddle iambic key using SMD components
Simon M0ZSU: Construction group update
Jim G0LHZ: Mystery software entry (now with one less bug)
Robin G4IWS: Two tone test oscillator to check audio distortion on an HF rig
Adventures with FT8 and an FM taxi radio: me
Both Mike and I still have work to do so you’ll be in with a very good chance.
Have a go and support your club!
Many thanks to Robin G4IWS for running proceedings.
Homebrew Asda biscuits, tea and coffee afterwards as usual.
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
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;
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
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
Tea, coffee and biscuits will be in abundant supply.
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
“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.
Website for the Reading And District Amateur Radio Club