[sdiy] Power Supply Start-up Issues

[Pete Hartman]

Kilpatrick Audio has an experimental banana based 4U format which uses a
similar scheme.  The modules are all fully enclosed, the power distribution
is +/- 15V DC but each module subregulates for itself down to +/- 12V
(and +5 or others where needed).

https://www.kilpatrickaudio.com/?p=kformat

Pete


On Thu, Aug 27, 2020 at 9:29 AM TERRY SHULTZ <thx1138 at earthlink.net> wrote:

> Hi Scott, and all
>
>
>
> I use a +/- 18.5 VDC and regulate it to +/- 15 VDX and in some cases
> additional +5VDC if I need it.
>
>
>
> This way my Oscillators don’t get detuned if I need to calibrate just one
> module.
>
>
>
> My newer designs are pretty stable and ny DSP module don’t need thermal
> calibration as they are PLL controlled.
>
>
>
> Same with my VCF’s
>
>
>
> This seems to be the best approach for my designs. My Power supplies are
> pretty rugged and reliable. They are from my VME Euro computer boxes from
> Motorola days.
>
>
>
> Best regards
>
>
>
> Terry
>
>
>
> > On Aug 27, 2020, at 7:08 AM, music.maker at gte.net wrote:
>
> >
>
> >
>
> >
>
> > As I read this, I visualize a modular with it's movable modules.  If the
> system is large enough, it can have more than one PSU to supply the
> necessary current.
>
> >
>
> > As modules can be moved, it's assumed they will be.  When they are, it
> is possible for the power distribution to change and perhaps cause startup
> or other problems, especially in a larger system.
>
> >
>
> > Would there be an advantage to a raw DC distribution system that is then
> regulated by each module?  I believe I've read here about people who have
> their PSU system implemented this way.  Any comment from people who've done
> this?
>
> >
>
> > Obviously, this wouldn't be an easy fix for a large modular system, but
> might be a consideration for a new machine.  Of course, this is tricky to
> say the least when one wants to buy a commercial module to add to a raw
> distribution system.
>
> >
>
> > -- ScottG
>
> > ________________________________________________________________________
>
> > -- Scott Gravenhorst
>
> > -- http://scott.joviansynth.com/
>
> > -- When the going gets tough, the tough use the command line.
>
> > -- Matt 21:22
>
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