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From: reh@ccd700.UUCP (reh)
Newsgroups: sci.electronics
Subject: Re: Choosing Cap Size in Power Supply
Message-ID: <656@ccd700.UUCP>
Date: Wed, 5-Aug-87 11:31:13 EDT
Article-I.D.: ccd700.656
Posted: Wed Aug  5 11:31:13 1987
Date-Received: Sat, 8-Aug-87 03:10:31 EDT
References: <5705@ut-ngp.UUCP> <1884@kitty.UUCP> <935@sdcc7.ucsd.EDU> <3691@watdcsu.waterloo.edu>
Organization: Ford CCD, Dearborn Michigan
Lines: 22
Summary: too much capacitance may be hard on your power supply

In article <3691@watdcsu.waterloo.edu>, bmaraldo@watdcsu.UUCP writes:
>     I have added as much as .25F to a power amplifier and notices an
>     incredible improvement in the low end transient responce.  These
...
>     I generally put as much capacitance on the dc rails as possible.  Under
>     some operating circumstances, this may not be advised, but these
>     unusual circumstances are unknown to me.  Also remeber to put a
>     drainage resistor across the caps that'll drain them when the power
> 					Brett L Maraldo

During power-up, and even during operation the power supply currents
will be much higher and the rectifiers (and even the fuse) may not
be able to handle it.  But it will sound better while it works.
The transformer may also generate more heat.

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Bob Harold                      313-845-5404   
Ford Motor Co., DPTC room B-206 ...!ihnp4!mibte!ccd700!eed090!bob
17000 Rotunda Drive             Disclaimer: The views expressed might
Dearborn, MI 48121-6010         not be those of my employer or myself
Have questions about life?  Read the original design manual - the Bible.
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