[sdiy] Power Supply Start-up Issues

[TERRY SHULTZ]

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
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at synth-diy.org
> http://synth-diy.org/mailman/listinfo/synth-diy