[XCSSA] Power Supplies Continued

[X-otic Computer Systems of San Antonio]

If I could find a clean one, that might work. Trouble is, most  
switched power supplies are quite noisy for analog audio applications.  
The SIDs are analog devices and so require very clean power. To be  
fair, I've used some nasty DC power supplies and things worked out -  
the smoothing capacitors did their job, but I think converting AC to  
DC oneself tends to be the better route to go. That way you know how  
it's made, etc.

That's one reason I'm trying to avoid using multiple voltage  
regulators in fact. Supposedly, chaining regulators adds noise as  
well, so if I can use a single regulator for each output that might  
result in a nicely quiet solution. I think I may end up going with two  
transformers ultimately. Finding a multi-tap that can output something  
close to 5 and 9VAC seems to be somewhat difficult.

Decisions decisions! :)


On Dec 27, 2008, at 5:41 PM, X-otic Computer Systems of San Antonio  
wrote:

>
> Perhaps you might consider using two modular DC switching supplies
> (5V/1A & 9V/300mA) that have regulators and over-voltage protection
> built-in?
>
> You could mount the two supplies in a hobbist handy box, and add
> an on/off switch and input fuse for the 120VAC line.
>
> Lou
>
>
>
>
>
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