The Radio Waves Group meet on the 2nd and 4th Friday every month at The Sun Inn, Eastwood (upstairs) from 9.00 am – 12 noon.
The contact for the group is Ray Dring on 01773 770138
The Radio Waves group tries to understand the modern world. From it’s history to the present day, the techniques, technology, engineering and legislation also it’s operating rules and regulations.
To do this in a non-technical way we use books, DVD’s and live videos streamed from the internet as well as getting our hand on equipment.
We are slowly working along a path that will enable members with no technical knowledge to understand how electricity and radio run our society.
If a particularly relevant item becomes current in the news we may examine that instead of the planned meeting, for example;
Following the acrimonious campaign by president Trump we decided to look at Wiretapping and other types of bugging. We showed how in 1917 we tapped the German undersea telegraph line to expose the German plan to foment a war between Mexico and America, thus bringing America into WW1 on our side. We then looked at one UK domestic and three other famous Cold War incidences.
Following President Trumps announcement of the rapid expansion of the US military immediately following his election, we looked into the history of the 125000 atomic weapons that have been built to date, In particular the 2421 atomic weapons that have been exploded, 526 of them in the atmosphere. Included in this was a video of China’s nuclear preparations.
Following the dreadful fire in Grenfell tower, which we did not examine directly, we looked at the systems that should protect us from such occurrences. In particular we looked at how gas, fuel oil, air conditioning and high and low voltage equipment should shut down safely. How did it spread with modern building techniques?
Following the need to protect the ozone layer some older equipment began using Propane or Butane as the operating gas. In addition there has been a considerable amount of counterfeit CE marked equipment bought in to the country including fuses, circuit breakers, and other electrical equipment. We looked at how such things would reduce safety in such a situation. The people in the tower were of the poorest strata and so were more likely to have cheap, old, poorly maintained or faulty equipment in possibly overcrowded rooms. Even so our systems should have protected them.
For further information about the group and/or current meetings please contact Ray.
The first meeting was on Friday 8th July 2016.
Visit to Bletchley Park June 2019
On Friday 21st June, a full coach of Eastwood U3Aers set off for Bletchley Park – the once top-secret, but now celebrated, centre for British intelligence in WWII.
As a child born in the 50s, I was brought up on stories of ‘the War’ but this visit gave me an insight into an aspect of the ‘Home Front’ I still knew little about (although that was more than the population did at the time). The Visitor Centre gave an effective initial overview of the development of the site against the background of the events of the war, and contained numerous exhibits, a café and a book shop. You could also pick up a free multi-media guide or book an introductory walking tour.
Our softly spoken, but incredibly knowledgeable, Canadian guide immediately opened our eyes to Bletchley’s vital importance (it is believed that its work shortened the war by 2 years) and also to the mind-boggling complexity of enemy intelligence codes transmitted by the Enigma and later the Lorenz machine. We also learnt about the types of people employed there from young and brilliant mathematicians and linguists harvested from top universities, to debutantes, valued for their more colloquial German acquired at finishing schools in Europe, to motor-cycle champion dispatch riders.
Huts 3 and 6 had been restored to show the different stages involved in completing the decrypting and also the far from luxurious working conditions of the many employees. (There was a war on!) Hut 8 featured: a recreation of the office of Alan Turing – one of the most famous and the most tragic of the code-breakers; interactive displays to illustrate some basic code-breaking methods; and a heart-warming tribute to an ancient but very effective method of carrying messages – the homing pigeon! The Bletchley Park mansion itself contained reconstructed rooms and also oral histories from workers, now at liberty to speak about their work, living arrangements, recreation and romance. Outside were the grounds and the lake, once used for recreational ice-skating by the workers in wartime winters.
Sadly, I had only just set foot in the computing museum, when it was time to go. There was clearly much more to experience at Bletchley but fortunately, your ticket allows return any time within a year!
Visit to Jodrell Bank June 2018
Sixteen members boarded the minibus bound for Jodrell Bank in Cheshire. We arrived at 11-30 am and were given a wrist band and a map of the site. Some retired to the cafe for coffee and others went around the various exhibitions.
The first was the Planet Pavilion which depicted the planets in our solar system. A clockwork orrery was situated above near the ceiling, was activated by turning a handle. All the planets moved in their orbits around the sun.
Outside one could stroll around the giant Lovell telescope.There was able seating to sit and admire this wonderful structural engineering. There are two smaller radio telescopes, one was elliptical in shape, named Merlin.They were linked to the Lovell telescope when observations were made of comos.
After another coffee break we visited the Space Pavilion which had a fascinating array of cosmic information ; such as quasars, blackholes, and galaxies. A lady from Manchester University gave an interesting lecture on how the Lovall telescope was built and a summary of professor’s Lovell involvement with the development of radio astronomy . She explained how neutron stars were formed,and also how the whole wave spectrum was utilised to form pictures of the comos.
It was a wonderful day and we must thank Janet for organising the visit. Alan Bates
The Radio Waves groupwas treated to a fantastic lesson by Ray Dring showing a film about the Astrolabe which is a invention designed to show the elevation of the planets in the night sky. Next we saw three models, the first being an Orrery invented by Lord Orrery of Northern Ireland, showing the orbits of the solar system over many years. The second was a Tellurian showing the sun, earth and moon orbits. Finally we saw a working model of Leonardo da Vinci’s first clock that is wound up using chains and weights. Janet Kirk
Photos by Frank Queripel
October 2017 visit to the British Horological Institute
We all had an enjoyable and informative trip to the British Horological Institute on Thursday. Being able to see such a wide range of clocks and watches. Hearing the speaking clock, which was first used on 24th July 1936, was extremely interesting. A photograph of the speaking clock is below. The building these clocks are housed in is a gem. We all said what really clever people made these timepieces. It is good to know there are courses still being taken to learn this art. We all thanked the ladies running this museum who were very informative and most willing to answer any questions. Janet Kirk