MOTM

Thanks Richard!

John  


-----Original Message-----
From: Richard Brewster [mailto:pugix@...] 
Sent: Wednesday, October 01, 2008 4:36 PM
To: JohnLeightonRice
Cc: motm@yahoogroups.com
Subject: Re: [motm] To wire or to not wire power supply sensing terminals???

As you can see, the wires from the supply to the distribution boards on 
my portable cabinets are no more than eight inches long and they are 
16-gauge.  With wires this large and short, the voltage drop will be 
very small, and remote sensing wouldn't provide any benefit that I can 
see.  I thought that remote sensing was useful only when the distance to 
the load is great enough to result in significant voltage drops.

Richard Brewster

JohnLeightonRice wrote:
> In a DIY power supply thread on MUFF's forum here 
> http://www.muffwiggler.com/forum/viewtopic.php?
> t=1200&postdays=0&postorder=asc&start=30 (look for matthias' first 
> post about half way down) it was suggested that power supplies like 
> the PowerOne models that have remote sensing terminals should have 
> those sensing terminals wired up to the appropriate output terminals 
> to make sure the output voltage is always the same when the load 
> changes (adding or subtracting modules from the system would cause 
> this I guess?) That way you don't need to readjust the ps trimmers 
> after each change?
>
> I'm looking for second opinoins before I go ahead and do this. 
> Someone said that MOTM power supplies don't have the sensing 
> terminals connected and I also noticed on Richard Brewster's site 
> here http://pugix.com/synth/portable-rack-cabinets/ that his DIY 
> power supply doesn't have the sensing terminals connected either.
>
> If you look at the power supply pictures on the Synthesizers.com site 
> it looks like they wire up the sensing terminals.
>
> So, is one way better than the other? Are both equally 'good'? 
> Thoughts and recommendations appreciated! ;-)
>
> John L Rice
>
>
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