Bypass caps (was:Re: [sdiy] Silly question about dual vs. quad op amps

[Harry Bissell Jr]

Just for the record (and noobs)
  
  another solution is to either
  
  Power one half the rack, then after a time delay
  of a second or so... power the other half using a relay.
  
  ~or~
  
  Power the whole system through some series resistors that limit the
  inrush current, then short across those resistors after a one second
  delay.
  
  This is how I did my system... but the 'brute force' larger supply is a valid option
  too. Its more size and weight, less complexity.
  
  Engineering... ~make the choice~
  
  H^) harry

Tim Daugard <daugard at sprintmail.com> wrote:  From: "harrybissell" 
.
>
What price failure ?    More time is wasted by NOT using sufficient
bypass caps than is saved by not designing them in (in small
production runs). It is really hard to OVERDO the caps, unless the
power supply is unable to start because of the peak current :^P
>

Which happens, my system reached the point where the power supply was
adequete for steady stae use, but couldn't power up the system. I had
to unplug one row of modules from the power chain until the system
powered up. When all the other modules had charge their caps, the last
chain got pluged in. I finally solved that problem by putting in an
upgraded power supply - two modules wide with 3X the current
capability.

Tim Daugard
AG4GZ 30.4078N 86.6227W Alt: 12 feet above MSL
http://home.sprintmail.com/~daugard/synth.htm





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