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Terry Mackenzie-hoy

Terry Mackenzie-hoy

Mackenzie-Hoy is a consulting acoustics and electrical engineer – machoy@iafrica.com

A small town in Germany

16th November 2018 "Come on, Terence, " said Harry, "don't you know about the Hannover Fair ?" "In Hannover, Germany?" I said. "Exactly," he answered. 

My Mini Budget speech

9th November 2018 I read an article that summed up the points made in the speech of our latest Finance Minister, Tito Mobweni. It is a document that is full of this new unit of currency, the 'bn'. Forgive me, I am guessing here but the bn has been created to save paper, I think. Well, not really.  Before, one... 

Electric healing

2nd November 2018 Many years ago, I had a conversation with a very nice physiotherapist.  The subject got onto electrotherapy, the curing of muscular aliments by the application of electricity. She explained to me that there were two types of current: galvanic and faradic. She explained that these had different... 

Potential issues with charging electric vehicles

26th October 2018 All the big automotive manufactures are making electric vehicles (EV). Why? I mean that, right now, internal combustion (IC) engines, gearboxes, drive systems, instrumentation . . . the whole lot . . . are pretty much sorted for the conventional cars (let us call them IC cars), so why retool for... 

Electric cars one more time

19th October 2018 Audi recently flighted a number of advertisements about its new all-electric car. This is due in 2019 and, if my job was to be an electrical reviewer, I might well go on from there, citing charge times, range, power performance and how to jump-start it if the battery is flat. But I am not going... 

The elephant in the room

12th October 2018 From Wikipedia: "The expression 'the elephant in the room' defines a situation which refers to a question, problem, solution or controversial issue which is obvious to everyone who knows about the situation, but which is deliberately ignored because to do otherwise would cause great embarrassment... 

Adventures on the Eskom system – Part 4

5th October 2018 In my last column on the Eskom integrated power system, I explained that I worked for Eskom as the senior engineer for operations in the Eastern Cape for nearly two years. My region, the Eastern Cape region, included Port Elizabeth. Eastern Cape Control reported to me and all I had to do was to... 

Yet more adventures on the Eskom system

28th September 2018 In my last column on the Eskom integrated power system, I explained that I worked for the State-owned power utility as the senior engineer for operations in the Eastern Cape for nearly two years. The backbone of the national grid was the 400 kV powerline system and the 220 kV powerline system.... 

Recorded music

21st September 2018 From the first voice and music recordings of the 1800s, nothing much changed in the early part of the 1900s. Wind-up gramophones with paper mache cones were used for the reproduction of music that was stored on metal or wax discs. There was no electronic amplification – the recording was done by... 

Adventures on the interconnected electricity system

14th September 2018 In my last column on the Eskom intergrated power system, I explained that I worked for electricity utility as the senior engineer for operations in the Eastern Cape for just under two years. The backbone of the national grid was the 400 kV powerline system and the 220 kV powerline system, which... 

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