[Sem] [Noisebridge-discuss] Linear Op Amps needed

[Chris Murphy]

Regarding the linear op amp specs, according to an anonymous expert:

"The circuits work below 100 Khz and the video is likely to be slow scan
and does not need any special response properties beyond say about 200  
KHz.

It looks like the scanning circuits use mid bandwidth in the microscope
and that the video terminal perhaps uses the most bandwidth in TV mode  
and the
atigmatism and focus uses DC or to say very slow changes like knob
turning rates."

Chris

Sent from my iPhone

On Nov 21, 2010, at 16:17, jim <jim at well.com> wrote:

>
>   i probably have some 8 or 14 pin DIP 741 family op amps.
> i doubt that i have a dozen that are identical. what specs
> are needed (slew rate...)?
>
>
>
> On Sun, 2010-11-21 at 16:02 -0800, Chris Murphy wrote:
>> The scanning electron microscope uses lots of 8 pin or 14 pin 741C or
>> 709 linear op amps in DIP packages. We could use a dozen or more if
>> you have some sitting around that you could donate. I've searched
>> every corner of noisebridge and we don't have any.
>>
>> Leave them in a bag or container on the microscope rack.
>>
>> Thanks,
>> Chris
>>
>> Sent from my iPhone
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>>
>
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