Folderol wrote: > On Fri, 11 Jun 2010 14:16:17 +0100 > Daniel James <[email protected]> wrote: > > >> Hi Ralf, >> >> >>> Maintenance (care) is the name of the game. You need to calibrate, >>> demagnetize, replace dry capacitors, corroded relays etc. all the time. >>> >> True, maybe not 'all' the time if you are lucky. >> >> A case in point are those analogue mixing desks from the 80's and 90's >> with built-in computer automation. The analogue part of the desk >> probably still works, but you can't get any support for the software on >> the computer (if that works at all). >> >> Cheers! >> >> Daniel >> > > A case in point... > I built a precision audio generator in the mid 1970s. About a month ago > it had it's first fault. A rectifier diode failed, taking the fuse with > it. > > Wish I could get software with that kind of reliability! >
'mid 1970s', that's why your audio generator did not use a switching power supply. We need to be fair, modern analog technology also is tricky. I guess no switching power supply will survive without changing capacitors and resistors for such a long time. Especially the resistors are a PITA. Costs = nothing, but they are exotic and not close at hand. Or has anybody a collection of abstruse high ohmic resistors at home? This is what we have at home: http://en.wikipedia.org/wiki/Preferred_number#E_series:_Capacitors_and_resistors Switching power supplies will feed back garbage to the grid. At the end of the 80ies the human race became shallow. I know digital equipment from the 80ies with Mickey Mouse technical specifications, but I never heard state-of-the-art digital equipment with amazing technical specifications, fit to hold a candle to those oldish digital equipment. When driving with the bus I hear people listening to music played loud by mobile phone speakers. Musically pleasure yielded stupid constant stream of 'music'. Btw. to the list and off-list more and more people subscribed to LAD experience MIDI jitter on modern computers for every OS. OTOH using the rtai kernel patch, controlling CNC should be possible without micro controllers. I wonder if Linux audio is using the best rt patch, resp. if it's possible to use the rtai patch for audio too? http://en.wikipedia.org/wiki/RTAI http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl http://www.linuxcnc.org/hardy/ubuntu-8.04-desktop-emc2-aj07-i386.iso http://permalink.gmane.org/gmane.linux.distributions.emc.user/7179 Cheers! Ralf _______________________________________________ 64studio-users mailing list [email protected] http://lists.64studio.com/mailman/listinfo/64studio-users
