[sdiy] List Archives? and CA 3080 Question?

[patchell]

Cynthia Webster wrote:

> Hi List!
>
> Is there any kind of archive for all the information presented here day
> after day?
>
> If so, could someone please show me how to access the info?
>
> I remember recently reading about the classic
> CA 3080 "Voltage Control Anything you want" op Amp... and seem to remember
> someone suggesting that there is now a more modern replacement for it
> (like a 3880, or a 3280)??

    The CA3280 was the "replacement" for the CA3080, however, it is not a pin
for pin replacement (i.e., if you are repairing something that needs a CA3080,
you need to replace it with a CA3080).  The CA3280 is a dual OTA, plus it has
linearizing diodes in it.  For a new design, the CA3280 is a better choice in
that it is a much higher performer than the CA3080 (bandwidth and offset
voltage mostly).

>
>
> I'm wondering what the new part is, where to get it, and if I should just
> stick to the classic - or plug the new ones right into my PC Boards?
> Are the directly replaceable? and what might be the advantages?

    You can get the CA3280 from future active (http://www.future-active.com),
but the minimum buy seems to be 25 peices (1 tube).  However, if you already
have boards that use the CA3080, you probably don't want to purchase these
(for the reasons above).

    You can also purchase them from me.  I sell them at the 100 unit price
($2.65) in small quantities.

    You can also learn more about the CA3280 on one of my web pages :

http://www.oldcrows.net/~patchell/archives/archives.html

>
>
> I apologize in advance, because I have a feeling that this subject must
> surely have been beaten to death by now - LOL!

    Always willing to beat it some more...

>
>
> Kind Regards,
>
> Cynthia

--
 -Jim
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