Re: Amp output Z

On Thu, 14 Apr 2005 00:06:16 +0100, John Woodgate <jmw@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

>I read in sci.electronics.design that The Phantom <phantom@xxxxxxx>
>wrote (in <0q4r51pg9l8v7sin5c9jenvd4v6opa9k90@xxxxxxx>) about 'Amp
>output Z', on Wed, 13 Apr 2005:
>
>>In the real amp it must be something other a pure resistance of 10 ohms
>>to account for the voltages he measures.
>
>I see you have assumed that they are accurate. But do you not think that
>your inference from them is, on reflection, improbable? How could such
>an inductance arise?

This problem is not well described or measured. I can only do calculations on what Harry
has provided. I have determined the locus of output impedances that must exist to account
for the voltages Harry said he measured. If that leads to an impossible situation, one
might take that as an indicator that better measurements are called for, or a better Spice
model. I'm not sure we can figure out the source of the discrepancy based on what Harry
has told us.




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