[sdiy] Low Pass Gate is soooOOOOooo sweet

[Joe Kramer]

Dear Mikko,
    Thanks for the data.  The Allied catalog lists NSL32SR2 & SR3 at $2.84 each, and calls them "ideal for audio applications."  Seems like a good part to make a VC resistor, or very clean VCA.  To fast for a compressor maybe.

Regards,
Joe Kramer

mikko.a.helin at nokia.com wrote:

> NLS-32SR3 (and SR2 I think, which both are available in Europe from Farnell) have rise time (to 63% of final 60 ohm resistance @ 5 mA) of 5 ms and decay time to 100 kohm of 10 ms, after 10 sec the Roff is 25 Mohm.  It is pretty fast for an optocoupler. They are about 3 EUR, the slow NSL-32 is about 1.7 EUR. The slow ones look good ones for someting like resonance control for VCF:s (or something which isn't modulated heavily).
> -Mikko
>
> > -----Original Message-----
> > From: ext jhaible [mailto:jhaible at debitel.net]
> > Sent: 09. May 2002 13:14
> > To: Joe Kramer; harry
> > Cc: >>>marjan<<<; Prototek; synth-diy at dropmix.xs4all.nl
> > Subject: Re: [sdiy] Low Pass Gate is soooOOOOooo sweet
> >
> >
> > >     If it's speed you're after in an opto-isolator, look
> > into some of the
> > > Silonex/Audiohm units.  A rep for them told me about a
> > NSL32-type that he
> > called
> > > their "super" version, with almost no lag time at all.  Not
> > too expensive,
> > and
> > > Allied carries them.
> >
> > I use the NSL-32 in the PolyKorg Clone a lot. It is *very*
> > slow. Would be
> > nice for a phaser ...
> >
> > JH.
> >
> >
> >