[sdiy] 7915 regulators

[Jay Schwichtenberg]

Don,

First off I got the Linear Tech regulators wrong. They are the
LT1085/LT1033.

Keep in mind that these are 'audiophile quality' regulators and are low
current. About 100 ma. Some people go as far as having a regulator on each
op-amp. They are 'variations on a theme' of Sulzer regulators which were
discussed in Audio Amateur. The design goals for them were low noise, high
line rejection and low output impedance.

There are 4 initial articles total on the subject: 'Regulators for
High-Performance Audio'.

Audio Amateur, One:1995, Walt Jung
Audio Amateur, Two:1995, Walt Jung
Audio Amateur, Three:1995, Jan Didden
Audio Amateur, Four:1995, Gary Galo

Latter there was an update where a startup problem was fixed and newer
op-amps used in:
Audio Electronics, Four:2000, Improved Positive/Negative Regulators, Walt
Jung.

I found the new schematics at:
http://headwize.powerpill.org/ubb/showpage5.php?fnum=3&tid=3214&fdays=20&sti
me=0


Here are some other links I found on the WEB:
http://hitechnetworks.net/bwaldron/audioelectronics/sb1_regulator.htm
http://www.printedelectronics.com/discussion/discussion_papers_psupply.html

Jay


> -----Original Message-----
> From: owner-synth-diy at dropmix.xs4all.nl
> [mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of Don Tillman
> Sent: Sunday, October 20, 2002 2:24 PM
> To: jays at aracnet.com
> Cc: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] 7915 regulators
>
>
>    > From: "Jay Schwichtenberg" <jays at aracnet.com>
>    > Date: Sat, 19 Oct 2002 11:58:58 -0700
>    >
>    > I read a lot on 78XX/79XX regulators and gave up using them on
>    > anything that is remotely serious. There was an article on power
>    > supplies for audiophiles in Audio Amateur by Walt Jung and Jan
>    > Didden (sp?) that made me give up on them. Basically it said the
>    > 78/79 were junk, LM317/LM337 were better and LT1086/LT1175 were
>    > tolerable in audio.
>
> Hmmm, "junk", "better than junk" and "tolerable".  Did the article
> mention any approaches that were especially good?
>
>   -- Don
>
> --
> Don Tillman
> Palo Alto, California, USA
> don at till.com
> http://www.till.com
>
>