[sdiy] Need info about RC4559N dual op-amp

harry harrybissell at prodigy.net
Tue Aug 20 06:13:38 CEST 2002


Right you are...

thanks for the info !!!

H^) harry

"KATAYAMA, Takuya" wrote:

> I think 4558 is NOT a low noise 1458....
>
> 1458 is very alike 741*2, but 4558 is unique circuit.
> Input stage is PNP in 4558.
> 741, 1458, and even 301A has NPN inputs.
> So, not only in audio circuits but also in DC circuits, 1458 is NOT
> DIRECTLY REPLACED WITH 4558/4559.
> (I think that 1458 is directly replaced with 4558 in analog synth.
> circuit but NOT reverse side compatibility.)
>
> S/R 4558 is lager than 0.7V/us (1V/us typ.), that of 1458 is 0.5V/us and
> below.
> 4558 is low noise and low distortion at 12kHz 10Vp-p output.
> ========================================================
> Takuya "PATA" Katayama at Muse Music Synthesizer Lab., Tokyo, JAPAN.
>
> harry wrote:
>
> >HAHAHA  HA ... and a 4558 is a low noise 1458....
> >
> >which is like a 20 CENT chip...  ;^P
> >
> >H^) harry
> >
> >Paul Schreiber wrote:
> >
> >>HAHA! A 4559 is a "low noise" 4558! HAHAHA! This is a 43 CENT chip!!!
> >>
> >>Paul S.
> >>
> >>----- Original Message -----
> >>From: "Glen" <mclilith at ezwv.com>
> >>To: <synth-diy at dropmix.xs4all.nl>
> >>Sent: Monday, August 19, 2002 8:41 PM
> >>Subject: [sdiy] Need info about RC4559N dual op-amp
> >>
> >>>Does anyone know what is so special about the RC4559N chip? I just got a price
> >>>quote via email from an organ company, and they want $82.22 for one of these 8
> >>>pin chips! I'm really hoping that's a typo.
> >>>
> >>>Can't I just replace it with a more common (and much cheaper) low-noise dual
> >>>op-amp?
> >>>
> >>>If so, does anyone have a favorite substitute?
> >>>
> >>>
> >>>Thanks,
> >>>Glen
> >>>
> >
> >--
> >Jihad Terrorism Conspiracy New World Order
> >Revolution Black Helicopters Freedom of
> >Speech First Amendment Rights: Carnivore Bait
> >go ahead and READ my e-mail I have nothing to
> >hide... how about YOU ???
> >
> >
> >

--
Jihad Terrorism Conspiracy New World Order
Revolution Black Helicopters Freedom of
Speech First Amendment Rights: Carnivore Bait
go ahead and READ my e-mail I have nothing to
hide... how about YOU ???





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