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

[harrybissell]

No... I'd still say "cost / performance" ratio.  We measure things
like the rejection ratio of the power supply and intermodulation
distortion.

The aesthetic is "I like a crappy power supply rejection ratio... the
intermodulation distortion that results gives me a 'phatter' sound"

You DO have a valid point.  My best example would be the MXR "blue box"
octave divider.   If you try and simulate this circuit WITHOUT the power

supply interaction between the opamps... it will not work worth a sh!t.

Now I wonder... did the designers INTEND the interaction, or was it a
lucky accident ???

In most cases, such interactions are unwanted and designers try hard to
avoid them, with techniques like using a separate chip for a low noise
preamp and a high-speed comparator.

i'd guess that the circuit-bending folks would think the power supply
interactions are cool, and the hard-core engineer types would go out of
their
way to avoid it in the first place.

(for example) If it were up to me, the Wasp would never have
existed...   ;^P

H^) harry

"mcb, inc." wrote:

> On Thu, 16 Jun 2005, Harry Bissell Jr wrote:
>
> > Its a design choice that is dictated by cost / performace
> > ratio. I like 'em so I added them. Your mileage may
> > vary.
>
> Given that performance isn't a simple scalar value, I'd call
> this a cost/aesthetic ratio.  I noticed that one of the mods
> to the xoxbox actually reintroduces rail sensitivity in the
> resonance circuits.  And this being sdiy, why hasn't someone
> designed a voltage-controled sensitivity to rail fluctuations?
> A completely unexplored area!  (I'm busy working on VC'd panel
> color and configuration.)
>
> m