Originally posted by Liney Oh the joys of thermionic valves! We were taught on a couple of radio sets that still ran on valves and the pre-start check was to power on and wait five minutes. Then you ran your finger along the top of the valves and if any were cold you powered down and changed them out before proceeding.
The problem with the modern equipment in part is because of the dependance on microchip technology. Circuit boards have become so compact that you can't repair them, so it's a case of throw it away and get a new one. Again during training we were taught to carry out repairs on circuit boards, but at that point (early 80's) the miniaturisation had not reached the point of multi-layer boards and circuit tracks the thickness of a human hair. Our repairs were carried out by scraping back the varnish layer, soldering a thin gauge wire across the break, and revarnishing the board.
Back in those days there was a real fear of a Nuclear war, and a lot of time and effort went into designing electronics that were "hardened" and could withstand an electromagnetic pulse (EMP) from a nuclear explosion, especially for military use equipment. Nowadays, well we don't need a nuclear explosion but a decent sized solar flare hitting the atmosphere would damage equipment that is not protected. One big juicy solar corona and parts of the world could be dark and quiet until a lot of things get replaced.
I do agree that many products are not as robustly constructed as in the past...say 50-60 years ago. Cars for example...American ...I'm familiar with, say full size '50's, '60's Chevy's Fords, etc. were body on frame, quite heavily built....thicker gauge metal in body panels...cast iron engine blocks. Many cars, trucks, motorcycles were designed back then, without the aid of much in the way of computers and I think the required strength of an American car part was determined by adding enough 'beef' to a part to make sure it stood up. And domestic cars of the past era could take a beating, as can many modern vehicles.
Modern cars generally have thinner gauge sheet metal, aluminum blocks, strength required is determined by computer programming after engineering variables are fed into programs.
As with many things there are pros and cons about whether older or newer vehicles are 'better'.
Modern cars, trucks, motorcycles, IMO, are generally more reliable and durable than vehicles of over half a century ago....but have different things go wrong. The mechanical bits of a modern vehicle may last longer, be more reliable and durable, but breakdown in many cases is due to electronic components suffering from the inevitable, noise, vibration and heat generated by hard working vehicles... and in some climes (prairie and northern Canada for example) extreme cold which can lead to causing parts to become brittle and more subject to fracture, etc.
Makes me think of another point. Back in '74 I visited the UK and rented a car, a newish Morris Marina and in '77 went again, this time renting a newish Ford Escort. Both cars were fine, except the Morris drank about a quart of oil a day
) At the time I had a '73 Toyota Corolla and Chevy Chevette ( similar to a Vauxhall) ...both of which were factory prepared for the western Canadian (prairies) market...which where I live has long ( 5.5 month min.) winters where there is lots of snow and ice...and periods of temps that go down to -30 and colder for some periods.
First time I popped the hood of the British market rentals, I noticed significant differences...much smaller batteries and no block heaters in the British cars.. For those unfamiliar with block heaters, these are engine heaters installed into either engine block or water to heat block during colder than -20 degree temps and pretty well come standard on Canadian market cars on the prairies. You plug the block heater into an electrical outlet and this keeps the engine warmish. Otherwise without a block heater you may have difficulty turning over an engine that has been sitting for a couple of days in -30 or worse. temps.
I mention this last point as I wonder, if in some electronic components are manufactured to a more robust standard for particular markets, where climates may be harder on parts ?
I think I know the answer.....of course not !