Old sound versus New
Prompted by an article in the Popular Mechanics Magazine, "Vintage Audio in the Digital Age" by Mark Wilson - December 2011 I thought it pertinent...
Post-It Notes
Post-It or Sticky Notes are credited to two employees of the 3M company, Dr Spencer Silver and Art Fry. The ownership of Sticky Notes are...
X-Rays
[caption id="attachment_1772" align="aligncenter" width="226"] Courtesy bodywonders.com[/caption] (b) 1845 - (d) 1923 In 1895 Röntgen generated electromagnetic radiation in a wavelength range called X-rays; he received...
Who Found What? answers
We all think we know whom Albert Einstein was, most think of him as an inventor. He wasn't, Albert Einstein was a German theoretical physicist...
Who Found What?
Who found what is Parts-Ring's educational posting - add your 10c worth, we are all interested in great discoveries, inventions, patents and of course ridiculous...
Expensive Car Repairs
[caption id="attachment_1622" align="aligncenter" width="271"] The Taxi Recapitalisation Program in South Africa - Nice Fodder for the Dump[/caption] I read with interest on the web various...
Active Versus Passive Crossover Systems
Anyone whom thought that slapping a home brewed filter together to act as a loudpseaker crossover was a simple task should have his head read....
The Great Auto Parts Rip-Off
Just like food prices which seem to escalate every time the economy merchants bark, we see auto companies supplying parts turning to their calculators and...
UPS Design – Part Two
In order not to confuse we will stick to three types of UPS and the electric motor-alternator or frequency converter, which is; the standard inverter...
UPS Design – Part One
Recently I was posed with a training dilemma facing sales staff at a national distributor of computer hardware as to why UPS sales were so...