[sdiy] NE570 drop-in replacement for NE571

[Kyle Stephens]

http://www.diystompboxes.com/smfforum/index.php?topic=77281.0

If it makes a difference re: clock noise, it doesn't appear to use use the usual BBD driver chip.


I've a DOD FX-62 chorus that uses an MN3007, and no compander in or out, and it's dead quiet (least I've never noticed any noise, clock or otherwise).


_Kyle

--- On Mon, 4/23/12, aankrom <aankrom at bluemarble.net> wrote:

> From: aankrom <aankrom at bluemarble.net>
> Subject: Re: [sdiy] NE570 drop-in replacement for NE571
> To: synth-diy at dropmix.xs4all.nl
> Date: Monday, April 23, 2012, 4:17 PM
> I have two DOD R-870's that have
> distortion problems that I think are related to the NE571's.
> I've ruled out the BBD's sort of because the distortion is
> there whether one BBD is on or both. It could be a BBD
> biasing problem though. Imagine trying to get the biasing
> right on an effect that runs the signal through an SAD512D
> then through an MN3005! It's a weird design, but it sounded
> awesome at one time. I know the MN3005 isn't the problem,
> but I can't run it with the SAD512D off (because it never
> is). If the SAD512D is the problem, I'll just wire around it
> I guess. What it sounds like is the expander section is wide
> open all the time or is tracking clock noise.
> 
> AA
> 
> 
> On Mon, 23 Apr 2012 14:58:46 -0700 (PDT), Kyle Stephens
> wrote:
> > I got my info here (I've a hard copy), though I reckon
> aankrom might
> > already have a schematic to work from:
> > 
> > 
> > http://www.lulu.com/shop/thomas-henry/making-music-with-the-ne570-compander/paperback/product-3377724.html;jsessionid=A63ED4B9A962E7D58899AEF7B7D0DE74
> > 
> > 
> > _Kyle
> > 
> > --- On Mon, 4/23/12, Gergo Palatinszky <Gergo_Palatinszky at epam.com>
> wrote:
> > 
> >> From: Gergo Palatinszky <Gergo_Palatinszky at epam.com>
> >> Subject: Re: [sdiy] NE570 drop-in replacement for
> NE571
> >> To: "aankrom" <aankrom at bluemarble.net>,
> "synth-diy at dropmix.xs4all.nl"
> <synth-diy at dropmix.xs4all.nl>
> >> Date: Monday, April 23, 2012, 2:23 PM
> >> Hi,
> >> 
> >> Shortly: YES (570 is better)
> >> 
> >> One has tighter spec.:
> >> 571: Gain cell distortion: Untrimmed/Trimmed   
> >>       Typ: 0.5 / 0.1      Max:
> >> 2.0 (%)
> >> 570: Gain cell distortion: Untrimmed/Trimmed   
> >>      Typ: 0.3 / 0.05 
> >>    Max(untrimmed): 1.0 (%)
> >> 
> >> you can use cool audio version v571 as well...
> >> 
> >> Long: might you need different trimmer settings if
> you would
> >> like to reach the best performance...(but this
> needed in
> >> between two different 570s as well...   if
> >> there is no trimmer ... move to short answer.
> >> 
> >> For more scientific approach check manufacturer
> data sheets
> >> deeply :O)
> >> 
> >> br,
> >> Pala
> >> ________________________________________
> >> Feladó: synth-diy-bounces at dropmix.xs4all.nl
> >> [synth-diy-bounces at dropmix.xs4all.nl]
> >> ; meghatalmazó: aankrom [aankrom at bluemarble.net]
> >> Küldve: 2012. április 23. 22:05
> >> To: synth-diy at dropmix.xs4all.nl
> >> Tárgy: [sdiy] NE570 drop-in replacement for NE571
> >> 
> >> I'm wondering if I can use an NE570 in place of an
> NE571
> >> with no fuss
> >> or muss.
> >> 
> >> AA
> >> _______________________________________________
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> >> 
> 
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