On Wed, 23 Aug 2017 18:50:35 +0200, Edward wrote in message <cakenem7yvuec-ruqkupnazrpnvync7sh6x3f3nwgwgqopfx...@mail.gmail.com>:
> Sometimes there are advantages in opting to use the old way. > > For instance, a mains transformer based power supply, normally has a > far longer life than a switched mode power supply, although the latter > offer the advantage of supplying far higher currents at lower DC > voltages. Still, for an old electronics engineer, provided a 3 phase > power supply is available, very high DC current outputs are possible > with a ripple of only 15% of peak voltage. This performance can be > achieved even without a smoothing capacitor! [For those who want the > exact percentage, it is a matter of solving an equation containing a > couple of sines. Draw 3 sine waves with the same amplitude but reflect > the negative have cycles into the x-axis. Then solve for the > intersection points.] > > So, the musty fusty old ways cannot be completely forgotten. In this > case, if you want very long term reliability you have to use the old > way. > > My little motto is: use the best fitting technology available without > giving undue consideration to whether its old or new. ..even that approach can fail you, if your occupation etc power e.g. require you wear some kind of tracking device, e.g. the funny hats Catholic and Protestant European Feudal powers made Jews wear during the last millenium, served as tracking devices, as anyone seeing such funny hats immediately knew the guys wearing them were Jews. ..cell phones are no different these days, and the anonymous drone operator cited in: https://theintercept.com/2014/02/10/the-nsas-secret-role/ is crystal clear: “It’s really like we’re targeting a cell phone. We’re not going after people – we’re going after their phones, in the hopes that the person on the other end of that missile is the bad guy.” ..the "best fitting technology available" today is whatever makes you look like Boring Joe Average, making undue consideration of what best best way to serve your own ass, rather than what _is_ best. -- ..med vennlig hilsen = with Kind Regards from Arnt Karlsen ...with a number of polar bear hunters in his ancestry... Scenarios always come in sets of three: best case, worst case, and just in case. _______________________________________________ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
