[Noisebridge-discuss] Linear Op Amps needed

[jim]

   sounds like anyole chip with 2MHz or greater 
unity gain. i'll look through my big pile of 
stuff. Thanks for the reply. 



On Mon, 2010-11-22 at 18:23 -0800, Chris Murphy wrote:
> 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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> > > 
> > 
> >