SV: Re: [sdiy] Linear PSU options .. 7815/7915 vs LM317/LM337 vs 723 etc

[karl dalen]

Forget about using 78xx/79xx, use the 317/337 they
are way better for SDIY use and general audio.

Ua723 are an old faggot (made in 1968) but way superior
to 317/337 and a "large number" of the never LDO,s on the 
market. The 723 is just the clasic regulator cirquit
assembled onto a chip.

They are all dirt cheap!

KD


--- Seb Francis <seb at burnit.co.uk> skrev:

> Someone just suggested the LM317/LM337 are supposed to be better than 
> the 7XXX series.  Has anyone ever done a comparison between these?
> 
> Seb
> 
> 
> Seb Francis wrote:
> 
> > Hi,
> >
> > I'm almost getting to the stage where it's time to move my 
> > multi-compressor/gate/distortion project from the breadboard to PCB.  
> > The final piece to design is the PSU.
> >
> > The requirements are not too unusual .. +/-15V at probably 200mA max, 
> > and I want it to run from a standard AC wallwart (or maybe I'll stick 
> > a transformer in the box - I haven't decided yet).  My first thought 
> > is to use a 7815 & 7915, but I'm wondering is there some 'better' PSU 
> > design?  What are some other options, and what actually are the 
> > advantages in going for a more complex PSU?
> >
> > I've seen plenty of power supplies based on the 723, but I don't need 
> > variable voltage or current limiting and it doesn't have to be exactly 
> > +/-15V - near enough will do as long as it is a clean DC voltage!  
> > Would I expect to get less noise from a 723 based PSU compared to 
> > 7815/7915, or is this more a question of the smoothing, decoupling and 
> > board layout?  Are there any options which will make a better PSU than 
> > 7815/7915 but without the complexity of a 723 based PSU?
> >
> > Many questions, I hope some kind person can help me :)
> >
> > Seb
> >
> >
> >
> >
> 
>