No subject

[Synthaholic AKA sPEW]

On Sat, 22 Feb 1997 17:27:06 -0000, Paul Schreiber <paults at why.net>
wrote:

>Never use a switcher for audio unles you really know what's going on. =
>Besides the noise (100's of mv), most switchers require a minimum load =
>of 15% of the max. rated, or else they go out of regulation.
Truer words have not been spoke!

>
>Like Tony said: use a linear. Look in Allied or Newark for Condor, =
>Elpac, or Power One supplies (the good old 723 regulator is our =
>friend!).

If you want to build your own supplies, you can utilize a variety of
the simple three terminal regulator ICs available powered by a full
wave 1n400x diode bridge, 500uf (or thereabouts) caps and a wall wart
transformer.  Very simple and very inexpensive, especially if you have
some of this stuff lying around.  I have gotten very good deals on
(used) wall warts at 'All' electronics in Van Nuys California.  These
are also very quiet supplies.  I build the silicon stuff on vector
board (with etched stripes).  So far, I have used 1 inch by 3 inch
strips of 1/16 aluminum for heat sinks and they get barely warm.

If nothing else, these make great 'bench' supplies.
- Scott Gravenhorst (Synthaholic)     www.concentric.net/~chordman

Programming: The Ultimate Computer Game. | Windows 95: The Ultimate
Unfortunately, you never win.            |      Pain in the Butt

"I didn't do it."
   -- Bart Simpson