[sdiy] op amp based filter

[Roy J. Tellason, Sr.]

On Saturday 24 July 2010 12:08:21 pm cheater cheater wrote:
> On the other hand, maybe an op amp with an external capacitor could
> work? I understand LM101 is one such design but I was unable to find a
> place to buy them *cheap*. National has them at around $4, that
> doesn't look encouraging, but maybe someone owns a huge heap of NOS.
> As a bonus you can have them in metal can format.

Do you understand that the "101" part is military temperature range?  The 201 and 301 are much more common,  the 301 particularly,  and probably a whole lot easier to find,  not to mention cheaper...


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