[sdiy] +-12V supply

[Chris CROSSKEY]

 Toss out the 7812/7912 and use a 723 on each side with a big bypass 
transistor.....

that said, don't overdo the resevoir cap or it will start to make ripple an 
issue, a series of decade divided bypass caps isn't a bad idea... 100uF 
tant, 10uF tant, 1uF, 100nF,10nF, 1nF polyester...OTT but you get a nice 
warm glow from the knowledge that everythign is getting caught.... they 
ain't no such thing as an oversized heatsink, overspec the rectifier to make 
sure it runs cold, over spec the transformer adn make sure it's toroid.....

chrisc

----- Original Message ----- 
From: "Pat Kammerer" <spivkurl at wearerecords.com>
To: "sdiy" <synth-diy at dropmix.xs4all.nl>
Sent: Thursday, January 13, 2005 12:57 AM
Subject: [sdiy] +-12V supply


> Okay I'm making a PCB for an improved power supply (based on 7812 and 7912
> TO-220), and I had a quick question.
>
> Other than larger filter capacitors, are there any simple modifications to
> the "basic" regulated power supply which would enable even lower noise
> floor?  Maybe it's too vague, but I'm not sure how else to put it.  I just
> want to make a good simple low noise linear PSU.
>
> Thanks for any help,
> Pat
>
>