One of the huge problems with this list is the
incredible time sink produced by certain links.

Byron's link to HyperPhysics made most of my morning
evaporate as I followed link after link. Incredible
web site. I had the will-power to pull away before
trying the HyperMath link from HyperPhysics. Maybe
after lunch...

Thanks, Byron.

Eric
KE6US
--- Byron A Jeff <byron@cc.gatech.edu> wrote:
> > A schematic of my amplifier can be found at:
> > http://www.rocklizard.org/webdownloads/difamp.bmp.
> This is the *exact*
> > circuit that I am testing. 
> 
> > The inputs are fed from 2 adjustable voltage
> dividers.
> 
> This may be your problem. If you are create resistor
> based voltage dividers
> then the impeadance of the resistors could be
> impacting your circuit.
> 
> To ensure you have low impeadance voltages sources
> stick a couple of
> opamp based voltage followers in front of your
> inputs. Something like:
> 
>
http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/opampvar2.html
> 
> The voltage followers will drive the inputs hard,
> giving you more
> accurate measurements.
> 
> BAJ
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