[sdiy] yard sale find

patchell patchell at silcom.com
Wed Jul 31 03:07:48 CEST 2002



John L Marshall wrote:

> Out of context it reads wrong. I was describing the load. Too much load.
>
> All measuring equipment influence the device under test. The question is how
> much influence? The frustration is when the influence causes unexpected
> results.

    Yes, and the unexpected results I usually get is that loading the circuit
with the probe make the dang thing work...how are you supposed to fix the
problem if the thing you are looking at the problem with fixes it (if I
remember, this was some sort of quantum mechanics phonom... :-)  ).


>
>
> Take care,
> John
> ---------------------------------------------------------------------------
> Pacific Northwest DIY Synthesizer meeting, July 20, 2002
> See: www.sound-photo.com
> ---------------------------------------------------------------------------
>
> ----- Original Message -----
> From: <media.nai at rcn.com>
> To: "harry" <harrybissell at prodigy.net>
> Cc: <synth-diy at dropmix.xs4all.nl>
> Sent: Tuesday, July 30, 2002 8:57 AM
> Subject: Re: [sdiy] yard sale find
>
> >
> > >Even the 10 megohm resistance of the 10X probe is sometimes too much.
> (you
> > >>can't
> > >
> > >-for instance... look at the voltage on a sample/hold capacitor... just
> > >>will not work)
> >
> > Don't you mean the "10 megohm resistance of the 10X probe is sometimes not
> > enough"??
> >
> >

--
 -Jim
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