Peter Butcher is with us on Thursday 11th May for the next club meeting.
Venue: Woodford Park, Woodley as usual.
In his own words:
“Communications between the Emergency Services, Police, Fire and
Ambulance have always been a problem. Complete inter-operability has been an elusive goal since the 1960s, so what has changed?
Three disasters; The East Coast Floods, the Isle of Wight Air Crash and Lockerbie prompted the Home office to take action and a set of
frequencies was allocated for the Emergency Services to allow
inter-operable communications. Planning rules were established and the question arose as to how many radio sites would be needed for a network to cover England and Wales.
A contract was awarded to Racal Radio in 1993 to calculate that number and I worked on that report as a Consultant, having recently retired from the Racal Radio Group.
The paper describes that work in detail, showing how time consuming and difficult propagation predictions were in those days and how two
different methods; manual calculation and early computer-aided
prediction gave sensibly the same results.
How that information was used and where we are now gives an interesting insight to government. After some long winded correspondence, the Home Office gave me permission to re-publish my historic report and added their version of today’s position.
Basically this paper is an historic archive of how things were and how
much, or little, things have changed!
A big thankyou to George M0GXB for helping organise this one.
Refreshments to be served – or perhaps more accurately to be made
available. Audience participation may be required to make them happen.
There will be many, many biscuits. Some of them in date.
Looking forward to seeing you there.
At our next meeting we welcome Prof. Mike Underhill G3LHZ to tell us all about magnetic loop transmitting antennas including the latest research. He will bring a selection of loops.
Venue: Woodford Park, Woodley, 8pm as usual, Thursday 27th April.
Further, Mike will address fundamental questions about antennas in
Mag loops offer interesting possibilities where space is at a premium –
a number of them we are hoping will fit in the tea room at Woodford
Also, if extreme volts and amps are your bag – this is definitely one
for you. I’m no expert (Rael is, M0RTP) but the tuning caps need to be
specially designed to handle the high voltages (often involving vacuums) and the loops themselves need low resistance.
Tuning of said caps offers challenges for micro controller/computer auto tuning so there’s something for Arduino/Raspberry Pi enthusiasts etc. – indeed Rael has done quite a bit of work here.
Refreshments to be served as usual.
Looking forward to seeing you on Thursday.
Many thanks to Rael, our own mag loop exponent, for helping organise this meeting.
Peter Blair, G3LTF, joins us on Thursday 9th March, 8pm at RADARC for a talk entitled “53 years of EME, then and now”. He will take a look at how it started and then a look at the scene today, in particular the technology developments. The concentration will be on the bands above 144MHz.
Prepare to be amazed at the possibilities and see how you might get started yourself!
Venue: Woodford Park Leisure Centre, Woodley, RG5 4LY as usual.
Refreshments will be provided as usual.
Next RADARC meeting is Thursday, 23rd February at Woodford Park, Woodley, 8pm as usual.
Satellite operating is easier than you think! Tim Kirby G4VXE (of Practical Wireless fame – need I say more) explains how to get started on the amateur satellites as simply as possible. Hopefully afterwards, you’ll want to give it a go!
In the words of the great G3NGX “Get to your seat by 8.00. Pin back your ears at 8.10. Digest what you have heard at 9.30 and wash it down with a cup of RADARC coffee. Consider how this could change your life for the better.”
Looking forward to seeing you all.
As of Friday 3rd February, a new GB3RD was put on air. It uses a similar type of base station but has new logic. The Repeater is now CTCSS only access so you will need to set an encode tone of 118.8Hz on your transceiver. The ident. is now by voice and occurs every 15 minutes.
The repeater is located on a farm and there are many potential sources of interference. To minimise these we have had a 3dB attenuator located in the antenna feeder. This has now been removed so the repeater should be 3dB (which isn’t much) stronger and also receive should benefit by the same amount. The implementation of full CTCSS should minimise potential interference.
G4CCC. o/b/o Thames Valley Repeater Group.
Sunday 12th February 2017
HARWELL AMATEUR RADIO SOCIETY are holding a Radio and Electronics Rally at Didcot Leisure Centre, Mereland Road, Didcot, OX11 8AY from 10.00am-3.00pm. There will be radio and electronics trade stalls, a Radio Society of Great Britain bookstall, information on local courses for those who would like to become a Radio Amateur and an Amateur Radio Demonstration Station. Refreshments will be available all day. Entry £3.00 (children under 12 free). Details from Ann G8NVI on 01235 816379 or [email protected]
Check out your 4 metre gear on the Reading 4 metre net on Tuesday evenings, 8:30pm, 70.425 MHz FM. All welcome!
I forgot to give it a plug on the Sunday GB2RS News net on the same frequency (9:00am news reading followed by net at 9:25ish) so this is to make up.
Next club meet is Thursday 9th February at Woodford Park, 8pm as usual.
Adam Juniper will give an introduction into the world of drones and advice on how to get started.
I wonder if it’s possible to string a top band vertical from one of those things….or whether it’s possible to get them to lift a line to the top of a tree for antenna stringing. Might even be safer than the traditional catapult.
Look forward to seeing you there and exploring the possibilities of these fascinating flying machines.
Refreshments to be served as usual.
Next RADARC meeting is on Thursday 26th January at Woodford Park as
In a talk entitled ‘Life on the Other Side’ Steve Venner, G0TAN/W6TAN,
will give us an insight into what happens behind the doors of one of the
country’s biggest ham radio dealers. With a focus on the workshop.
There’s opportunity for lots of discussion here about the past, present
and future of commercial amateur radio gear so I am sure it will be an
enjoyable and informative evening.
I can also be certain you’ll all be asking for discounts and I can
probably be even more certain what the answer will be 🙂
Sadly I won’t be able to make this one but I’m confident refreshments
will be served as usual.