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My browser, Mozilla, and reader, Acrobat,
seem to have trouble "decrypting" the
file from the link you gave. What to do?

Right click the link and have the browser just save the PDF to your hard disk. Then you can just double-click it and Acrobat will run it directly.

That's what I did, but Acrobat (latest version) says "there was an error opening this document.
This viewer cannot decrypt this document".

Strange, I could open this at work...

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This file is a little different. It has a hard password protection (that is not easily stripped--it may be trying to tell us something). I've downloaded it, but can not print a hardcopy.


JF

re-download it... the file may be corrupted...

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Here is another route:

http://www.alw.audio.dsl.pipex.com/jung_schematic.htm
http://www.alw.audio.dsl.pipex.com/toc.htm


JF

I've downloaded and I am reading it happily, with Acrobat 5.
Perhaps the protection is new to the newer versions of
Acrobat. I have not, however, tried to print it.

The super regulator looks awesome. I'd heard about it,
but this is the first time I've been pointed to the correct
reference. Thanks Glassman.

On the other hand, LM3x7/LT1963 is 15 components
(well, 30 including +ve and -ve) all included, meaning
rectifier, filters and passives, all avaliable from Digi-Key,
and only one (OK, two) critical capacitor (the output
cap for the LT1963 seems to be so, I'd use 50-100 uF with
very low internal resistance). It would need a rather large
(1-2000 uF?) cap as out of the LM317 to feed the LT1963
and, of course, good filters for ripple ahead of the LM317
(the 317 is internally protected so a cap as load should
not blow it up at startup--the protection is good, I ran
a 317 at 250% capacity overnight once, and it was still
good to go the next morning. Had a heatsink, though).
Perhaps a smallish tantalum (1-2uF), too, at the out of each
regulator. The LM317 sheet suggests yet another cap to
improve ripple rejection, too. This is still at about 15 pieces,
including the bells and whistles. Probably ~$50 in new
parts (if I'm lucky rummaging in my spare parts bins)
including a nice 25VA 22V+22V toroidal transformer, and could
fit in a smallish box with the Gilmore board.

All supplies (SuperRegulator or else) would run at 400 mA
most of the time, with IMHO small load swings mostly because of
the rather ugly nature of the load that the drivers of the cans are,
but I may be wrong here, especially for low impedence cans
(i.e. high power delivered to the load).

The real question is, what's the difference on the
audio side? Hmmm. I suppose it's all about the dynamic
behavior of the PSU--how do you measure that?
And how does the difference translate into color?

OK--how do you measure that, short of rigging some
really fancy gear for the purpose? Any ideas?

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One person has a test for this. Scroll down to dimitri's post here:
http://www.diyaudio.com/forums/showt...285#post246285


JF

It seems I didn't have the latest Acrobat.
I do now, and the Super Regulator looks
nice.

A few newbie questions:

So, one makes a standard tranny/rectifier/filter stage, and runs
the DC to the regulator? Should one
have filtering both before and after the lm3x7's?

For a dual supply how would things be done?

Are there PCB's available?

Audio Xpress sells them, but at $25, they are a bit pricey.

The May issue has an article describing Klaus Noll's amp, which is powered with a pair of dual-voltage super-regulators, and includes the foil pattern.

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Yup.
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No. Filtering is to smooth ripple. Ripple is what
you have, for instance, immediately after a rectifier, after
the AC sine wave has been turned into DC--the DC voltage
varies fro 0 to the peak all on the same side of 0, like the
sine with all the humps on the same side (V on y axis, time on x)

[I tried some ascii art here, but it's killed by the formatter, sorry]

In most cases you're plenty happy with what comes out of
an LM317, it's regulated DC with nice characteristics. However,
among the deranged you can't leave good enough
alone. Now, chances are I won't be able to tell the
difference but if you cascade a LT1963 after an LM317
you may be able to keep a gilmore amp happier. (Using the
SuperRegulator supply has the same intent.)

The idea is that the LT1963 is a faster
regulator with lower noise. The large cap after the LM317 is
not for filtering, but for supplying the LT1963 with additional
electricity when its speed makes demand on the source that
the LM317 can fulfill only after a minuscule, but perhaps
audible, time lag. So the cap discharges into the input
of the LT1963, until the LM317 rechages the cap.
In a way, the job of the LM317 is to keep the cap upstream
of the LT1963 fully charged at exactly 20V at "all times."
Except, it does it only as best as it can, but if we are lucky,
the voltage across the cap will never drop below 18V (what
I want out of the LT1963) and (18V+[drop from LT1963]).
This may take some experimenting, I'm afraid.

LM317 and LM337 are +ve and -ve regulators to do the
two sides of a dual supply, but there isn't a -ve equivalent
for the LT1963. JF earlier in this thread provided a link
to an info sheet that shows how to make up for this lack;
You need a tranny with two secondaries (they all have them)
instead of a center tap, and two rectifiers. No big deal.

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Voodoo: I believe you're talking about the SuperRegulator
PCB? Who is Audio Express?

JF: great link.

originally posted here:
http://www.diyaudio.com/forums/showt...285#post246285

Looks like the semi swiches on and
off and the load is made up by either one or both
resistors accordingly. Nice.
OK, let's figure what to use as real components in
this schematic. And what is good and bad PSU behavior.
'Nuff yacking, let's see if we can measure it

For all those that can figure it out, what is
the Thevenin equivalent of the power input of
a gilmore board? And how does this change under
a transient--OK, OK just the extreme cases, not a
full analysis for crying out loud. This is to have the
on/off cases for testing the PSU dynamically.
Or did I just ask for something insensible?
Plllleazz! Help here, I'm all excited

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Is this a trick question?

V+ to ground: ~65 to 234 ohms (max. load, min. load)
V- to ground: same


JF

not even a puff (small capacitance in the junctions)?
or a little, tiny inductance?

[edit] whoops! my PC crashed. OK, back to asking inane
questions. When the load on the class A finals is not resistive,
there are phase issues associated with it. That should
affects also the PSU, and that's the part that makes life
interesting. How can that be put into the picture? When
very small signals are amplified, disphasing the PSU is
about neglegible. When large signals are, that is no
more neglegible. How can one account for all this,
or at least approximate it, using something like Dimitry
test rig? Brainstorm!