MOTM

I just finished building and installing a power delay in my 
cabinet.  I have two MOTM-960 distribution boards so I just delay 
turning one of them on by a second.  I was amazed at what a 
difference this made.  It really cleaned up the power on voltage and 
I can tell a difference by watching the LEDs on these modules.  I 
took scope photos and documented it at:
http://modularsynthesis.com/modules/DJB-Power/djbpower.htm

Dave


--- In motm@yahoogroups.com, sasami@h... wrote:
>
> 
> >An overkill solution might be some kind of relay circuit with 
> >pseudo-random delay times (using different resistor values to 
charge 
> >up the caps) on each of the MTA connectors. Like on a Yammy TX816 
> >when power is applied and then a second later you hear 8 relays 
> >click, but not all at the same time.
> 
> I'm doing a PCB for something similar at the moment - it's away 
getting
> etched. It's a distro board with a relay and an adjustable delay. 
There is
> no need to have relays for each module. One per "bank" should be 
adequate.
> Just add modules until you get problems, then remove one. Add that 
module to
> the next bank. It's the inrush that's the issue. It's similar to 
an old hard
> drive problem, where staring current is so high that a bank of 
them would
> require a starting supply that can deliver twice what running 
requires, so
> each drive is delayed for 10 seconds times its ID number. That way 
the
> supply only needs supply the starting current for a single drive 
at any time.
> 
> Ken
> 
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__
> Ken Stone   sasami@h... or sasami@c...
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>