[sdiy] 18vac power supply

[harry]

Hi Rob...

The lower voltage and higher current "might" work because small transformers
suffer
from poor load regulation... often 20-25%.  So the lightly loaded 16V unit might
do
18V at 2/3 the rated current.

I assume the 12V -3A  was an AC wall wart ?  You might do a switcher in that
size...
but probably not an AC output.

Hey there's a new idea. Use an offline switcher, and synthesize a 12VAC
regulated
sine wave from it... that would make the magnetics nice and small  ...  ;^)

H^) harry

Rob wrote:

> Well, fyi, its usually pretty common to see 16 volt version, so you might
> want to go that route.. I would just make sure to get one that was about
> 300ma or more, just to make up the wattage difference. You always want a bit
> extra because the chinese manufacturers who make most of this stuff usually
> overrate it badly.
>
> Hehe.. We had them try to sell us a teeny tiny 12v 3a (yes, thats amps
> folks!) that was no bigger than a couple of matchboxes laid end to end,
> about 1 inch by 4 inches!
>
> I did something not very politically correct: I laughed heartily when I saw
> it! ;))
>
> At least we know they have dreams! haha!
>
> Rob
>
> ----- Original Message -----
> From: "harry" <harrybissell at prodigy.net>
> To: "Nicholas Pelkey" <njpguy at icqmail.com>
> Cc: <synth-diy at node12b53.a2000.nl>
> Sent: Saturday, January 27, 2001 6:33 PM
> Subject: Re: [sdiy] 18vac power supply
>
> > Try www.mpja.com  Marlin P. Jones has lots of adapters... maybe YOURS ???
> >
> > H^) harry
> >
> > Nicholas Pelkey wrote:
> >
> > > I need help finding a power plug for my Frostwave Resonator.  It needs
> to be 15-18vac 200mA with a 2.1mm plug.  I'd prefer the 18vac if I have a
> choice.  Any help would be great.
> > > Thanks,
> > > Nick P
> > >
> > > -------------------------------------------------------------
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> >