[sdiy] where to findrc4558nb opamp for arp solus?

[Happy Harry]

The 4558 is a good low noise slow opamp

The TL072 will work, but is much faster, may be less
stable, and may have phase reversal if driven beyond its
common mode range.

In most cases the sub will work, but be prepared to add
a small capacitor across the feedback resistor. Usually
50-100pf will make it behave.

H^) hary  (who had to add 100pF to his last night !!!)


>From: ElmacacoX at aol.com
>To: Ordeish at aol.com, synth-diy at dropmix.xs4all.nl
>Subject: Re: [sdiy] where to findrc4558nb opamp for arp solus?
>Date: Mon, 15 Oct 2001 14:53:22 EDT
>
>the 4558 op amp can be replaced by a TL072,  I've had 4558's replaced in my
>sh-2 and cr-8000 and it is a perfect fit, pin for pin and everything.
>
>more knowledgeable types might know if in some applications the 4558 has 
>some
>special performance specs that the TL072 don;t match,  but I'm pretty sure
>it'll do the trick.
>
>eduardo


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