[sdiy] Substituting op-amps

[Jason Proctor]

newbie chiming in: the LF442 looks like it's used mainly for CV 
summing and the potential range is quite wide. the TL072 is not 
rail-safe so it's not a good choice there. the MOTM opamp of choice 
for this application is the LT1013, also consider MC34072 and in a 
pinch, LM358.



>Hi All,
>
>This circuit calls for an LF-442 as well as a TL-074. I am assuming
>that if a TL-072 would work as well it would have been used as the
>quad was used elsewhere. Unless, of course, I have it backwards and
>the LF-422 is being specified as a cost-saving measure. I don't really
>know where either of these sit in the op-amp food chain.
>
>http://mypeoplepc.com/members/scottnoanh/sitebuildercontent/sitebuilderfiles/schem1.pdf
>
>What characteristics of the LF-442 are being exploited here? How would
>performance be affected by substituting a TL-072.
>
>tnx,
>Daryl
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