Category Archives: Talks

In-depth DMR talk by Denis G0OLX and Colin G4EML

Denis Stanton G0OLX and Colin Durbridge G4EML will be with us on Thursday 22nd June for an in-depth look at DMR or “Digital Mobile
Radio” (so sayeth wikipedia). These two chaps are acclaimed experts in the field (at least by Ian G8NXJ so that must be right). Find out all
about colour codes, code plugs and time slots. Rig prices are becoming affordable making this relatively new area of our hobby quite accessible.

Venue: Woodford Park, Woodley, 8pm.

Refreshments to be served as usual.

Signals Analysis of MH370

We have a special meeting forthcoming on 8th June (election day).

Venue: Palmer Building, Reading University, Lecture Theatre 109.

Use Shinfield Road entrance to campus. Post Code RG6 6UR.

Alan Schuster Bruce from Inmarsat will give a talk entitled “Signals
Analysis of MH370”.

He will talk about the innovative methods used in the analysis of
satellite radio signals from Malaysian Airlines MH370 to determine its flight path.

The disappearance of flight MH370 just over three years ago, you may recall, was an event of global significance. I personally was proud to see a UK company immediately leading the world in science and technology with heroic efforts to explain what happened. And particularly to see radio communications being “front and centre”.

It is a real privilege for us to be able to host this meeting.

It’s fine to bring guests but please let me know if you intend to do so
and how many.

Parking permits are not required on site. The closest car park to Palmer is Car Park 4.  Please see Whiteknights campus map and keys 2016 (1)

73

John
G4RDC

Magnetic loop antennas and fundamental antenna questions – Prof. Mike Underhill G3LHZ

Folks,

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
general.

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
Park.

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.

cheers

John
G4RDC

Links from EME talk

Thanks to Peter Blair, G3TLF;

He has passed us some useful links from his talk last week about EME.

We hope you find these useful and informative!

http://www.df2zc.de/newsletter/      2m Newsletter
http://www.nitehawk.com/rasmit/em70cm.htm 70cm Newsletter
http://www.nlsa.com/nets/moon-net-help.html Reflector
mailto:moon@moonbounce.info Reflector
http://www.physics.princeton.edu/pulsar/K1JT/  WSST
http://physics.princeton.edu/pulsar/K1JT/Hbk_2010_Ch30_EME.pdf   ARRL Handbook EME Section
http://www.moonbouncers.org/  Good technical info
http://www.qsl.net/dk7zb/  Great HB Yagis that work
http://www.hb9q.ch/hb9q/      HB9Q logger
http://www.chris.org/cgi-bin/jt65emeB   N0UK logger
http://www.w1ghz.org/antbook/contents.htm  Dishes
http://www.vk3um.com/software.html   Planner, Analysis++

Also if anyone is intending on getting involved in EME we would love to hear about it! You could even write a short article to go on this website.

There is a wealth of knowledge within the club so just come along and ask!