R/€ = 13.86 Change: -0.40
R/$ = 12.76 Change: -0.35
Au 1253.92 $/oz Change: 0.12
Pt 967.50 $/oz Change: 0.00

Terry Mackenzie-hoy

Terry Mackenzie-hoy

Mackenzie-Hoy is a consulting acoustics and electrical engineer –

Analogue versus digital

24th March 2017 Older speedometers are analogue. Clocks with hands are analogue. In fact, anything that indicates a quantity using a needle is analogue. By this we mean that the value of the quantity is indicated in some proportion to the quantity itself. The simplest example is a balance beam, which has a fixed... 

Engineers and TV

17th March 2017 Some of my relationships have failed as a result of my interaction with TV. There we are, she and I, hands entwined, hers around a bar of chocolate and mine around a glass of whiskey . . . and something on TV will be such rubbish that I will have to use a phrase like "Gosh! Never !" or... 

African cooking show

10th March 2017 The other day I realised that I had eaten food in many African countries outside South Africa and had never passed on my experiences. So, here, in no particular order, beginning with Swaziland, are my experiences. Somewhere, I know that in Swaziland there is a restaurant that serves fine food. I... 

Slave labour

3rd March 2017 Thomas Brassey and William Mackenzie built the greater part of the Paris and Rouen Railway. They were British. Their firm got the job because the French contractors were too expensive. Between 1841 and 1844, they built about 700 km of railway line in France. Very little of the work was done with... 

Climate change a 100% robust hoodwink

24th February 2017   I had to explain to somebody that the United States in 1945 dropped two nuclear bombs on Japan. The first bomb was a uranium atom bomb. The second bomb was a plutonium bomb. Following the detonation of these devices USA, Britain, France, Russia developed programs to test bombs of increasing... 

World domination through the Internet

17th February 2017 About 43 years ago, my friend Charles and I decided to see if we could make the letter 'E' appear on an oscilloscope screen. I could easily explain to you how we did it by varying the Z intensity of the oscilloscope, the time base, the 'Y' deflection . . . But would you really care? 

Mali gold

10th February 2017 There has to be somebody out there who watches Gold Rush on TV. A short summary is as follows: three different crews are mining for alluvial gold in Alaska. In the programme, every tenth sentence contains the G word: "Hey, look! It's gold!" and "I'm sure we'll find gold!" You get the idea? Last... 

Our wonderful world

3rd February 2017 Wonderful World Civil engineers very often ask me about electrical engineering. However, since civil engineers are pretty good listeners, absorb the following and you will know more about electrical engineering. 

Our brave new world

27th January 2017 It is I think the stuff that dreams are made of: a system is invented whereby organisations, governments and individuals can seamlessly communicate with  one another without tediously writing and delivering letters and notices. It is with us now: email, SMS, Whatsapp, cellphones. Instant... 

We should spend time with our loved ones

20th January 2017 A week ago, my darling, my best friend, was driving back from her mother’s house. She must have felt a slight pain in her chest and so pulled over into the parking area near Kloof Neck, which has a beautiful view of Camps Bay. There she died. When they found her, she had a smile on her face. She... 

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