[sdiy] Phantom Power Supply

[houshu at muj.biglobe.ne.jp]

Hello List,

Here is information to treat high voltage with 317.

  http://www.linear-tech.com/pdf/an2.pdf

See Fig. 11 (and 11A).

Sam Hoshuyama

> got me!
> Abs max says max input 37V, and that is related to reference point, of course.
> You can raise the reference point, but a short to gnd (no so unusual
> during plug in or cable problems) then will not be catched by the SOA
> circuit (I think).
> 
> I like the discrete circuit that was posted.
> 
> m.c.
> 
> > -----Original Message-----
> > From: Theo [mailto:t.hogers at home.nl]
> > Sent: Freitag, 29. August 2003 20:36
> > To: Czech Martin; Dave Magnuson; synth-diy at dropmix.xs4all.nl
> > Subject: Re: [sdiy] Phantom Power Supply
> > 
> > 
> > Depends on the design actually.
> > Its a maximum output of  35V or so against the reverence voltage.
> > If the reverence has been raised to sufficient level the 317 
> > may even output
> > 400V.
> > 
> > Theo