[sdiy] Dual power supply solution? - Kits vs 2600

[Harry Bissell Jr]

I posted a lengthy offlist to Tom on the @nal
retentive
issue.

Here I will just say that in CLOSED systems where the
designer has complete control, they may elect to
delete
voltage references if they do not cause performance
liabilities... or give little improvement for the
BUCK $$$.

In modular systmes with mix 'n match components... one
designer (someone else) may FVCK your design because
they piss in the swimming pool (power rails) and you
did not equip yourself with goggles.

It could, or could not... happen to you.

Tom is indeed in good company 'trusting the rails'. I
prefer not to. Then again I think that BBDs are noisy
sh!tty sounding devices... and others love them for
their warts.

H^) harry  (retentives anonymous :^)

--- phillip m gallo <philgallo at attglobal.net> wrote:

> Tom,
> 
> Calling the use of VREF circuits "anal-retentive"
> does beg the definition of
> that characteristic in context to synth devices. 
> You may be right.
> 
> I know that VREFs are an important part of my
> personal protection a
> long-standing intolerance for sources of drift,
> noise, and instability.
> This intolerance is so severe that it may very well
> meet your definition.
> 
> Lot's of equipment, perhaps the majority of
> equipment, does not implement
> VREFs from which crucial sources such as expo
> current ref/frequency tuning
> pots/comparator thresholds are derived.  Much of
> this equipment is highly
> regarded.  If you don't implement them you are in
> great company.
> 
> 
> Secondarily, your SMT adapter boards peeked my
> interest, how seriously are
> you considering making these available?
> 
> regards,
> p
> 
> -----Original Message-----
> From: owner-synth-diy at dropmix.xs4all.nl
> [mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf
> Of tomg
> Sent: Tuesday, June 14, 2005 4:09 PM
> To: Harry Bissell Jr; synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] Dual power supply solution? -
> Kits vs 2600
> 
> 
> Just in case someone might actually believe all
> that anal retentive paranoia..That there is
> something
> wrong with the way Arp designed the 2600 or
> the way I designed the 3500 series.
> 
> Here's a sample of the Widcat SBM. It has 3 VCO4s
> 3 VCFs, 4 ADSRs, 2 LFOs a bunch of other stuff and
> a onboard RXpro... It is all powered from the same
> 317/377 supply used for the 3500...
> 
> I hooked 1 vco to the output. The LFOs to the ADSRs
> and the other 2 VCOs to the ADSRs. I am madly
> turning
> all cutoff, freq and fine controls as this was
> recorded.
> Gee Wiz!! What about that? No problem at all!
> The little pop is me bumping the mic stand. I would
> say
> kiss my ass....but that would be childish :)
> 
> http://www.ele4music.com/pics/wildcat1.wav
> 
> Tom
> 
> 
> 
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