Digikey dose not have the RC-4558 op amp. Newark
electrinics dose but there is a $ 20.00 minimum.
They are about $ .79 each. The Norton op amp should
be $ .49 or less.
mike
----- Original Message -----From: jjhannon2001Sent: Monday, July 01, 2002 4:10 PMSubject: [vintagesynthrepair] Re: Help Identifiy IC's--- In vintagesynthrepair@y..., "ethanzer0" <ethanzer0@y...> wrote:
> Hello,
>
> I am trying to identify
> the two ICs on the ARP
> 4072 submodule. The
> schematic shows no ICs
> nor does the parts list.
>
> TIA,
>
> Ethan
Ethan, both IC's are linear types. One is the LM3900N (national
semiconductor) and the other is a LM1458 (also national part) you can
also use a RC4558 instead of the 1458. The LM3900 is drawn as 4
seperate amps in the schematic because there are four OP Omps in the
one 14 pin IC package. You should be able to get these from Digikey
on line. (digikey.com?)
Regards,
John
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