[sdiy] FW: earthing??

[Elby Designs - Laurie Biddulph]

With no power turned on, and the power supply disconnected from the system ie the 
+ve and -ve rails are connected to the power supply, measure the impedance between 
each rail and 0V and GND. This should indicate if there is a short or very low-
impedance path in the system

Best regards
Laurie Biddulph
www.elby-designs.com

On Tue Nov 25 11:58 , Dan Snazelle  sent:

>
>
>
>i am putting in the final power supply for my project. it is a dual 12 or 15 volt 
supply. (power one)
>
>Now i have been earthing both the case and the PSU off of the earth tab on the AC 
inlet with no problem all week. But strangely, when i hooked this up today I 
initially thought the PSU was busted and only after a few hours of troubleshooting 
did i figure out that it worked fine when  I disconnected the wire from the  
instrument CASE (but not from the PSU body)
>
>
>I WANT to be able to earth the case of the instrument...so any ideas as to what 
might be going on?
>
>my first thought was that maybe a positive rail or negative rail was touching the 
panel through a pot but at least on visual inspection this doesent seem to be the 
case.
>
>(and by the way i AM now soldering my connections to the pins of the pots, not the 
holes)
>
>thanks
>--------------------------------------------
>check out various dan music at:
>
>http://www.myspace.com/lossnyc  
>
>
>http://www.soundclick.com/lossnyc.htm
>
>
>http://www.indie911.com/dan-snazelle
>(or for techno) http://www.myspace.com/snazelle 
>
>
>
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