[sdiy] op amp based filter

[cheater cheater]

Ah, I just mentioned 101 since it's the one Wikipedia mentions in the
op amp article. I do realize that 201/301 are similar, they all share
the same datasheet. But yeah, it was just an example. But I wasn't
able to find the 201 or 301 anywhere for 'normal' money either. Well,
4 usd isn't that bad, but if you can get something similar for sub-1
usd and with good shipping costs..

Cheers,
D.

On Sat, Jul 24, 2010 at 19:02, Roy J. Tellason, Sr.
<rtellason at verizon.net> wrote:
> 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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