[sdiy] Resistor War !!!

[Happy Harry]

Good Point:

Here's an article that suggests that it is not "thermal"
noise, but contact noise. Gives noise figures in the same
order I did.

OTOH: Maybe you are not buying this explanation....
http://members.nbci.com/BoxerAmps/resist3.htm

H^) harry



>From: Grant Richter <grichter at asapnet.net>
>Reply-To: grichter at asapnet.net
>To: <owner-synth-diy at node12b53.a2000.nl>, Dave Krooshof 
><krooshof at xs4all.nl>
>CC: <synth-diy at node12b53.a2000.nl>
>Subject: Re: [sdiy] Resistor War !!!
>Date: Tue, 20 Feb 2001 11:56:03 -0600
>
>
> > Metal Film =
> > very high accuracy and stability over time
> > very low noise
>
>OK, resistor noise is a function of converting current noise (clumpyness)
>into voltage noise by the relation V = I x R
> >
> > Carbon Film (most common today)
> > Not so good stability
> > Not so good noise
>
>So how can two different resistors of the same value produce different 
>noise
>figures? Are we talking about mechanical noise sources such as microphonics
>or vibration sensitivity?
>
>Otherwise that does not make any sense. Resistors are not active voltage
>sources, so how can one type produce more noise than another? (since they
>don't actually generate additional noise at all?)
>
>

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