[sdiy] Audio taper pots - shunt resistors and contact resistance

[Mattias Rickardsson]

On 12 September 2012 09:52, Neil Johnson <neil.johnson97 at ntlworld.com> wrote:
> On 11/09/2012 15:54, Mattias Rickardsson wrote:
>>>>
>>>> Pots are imperfect devices.
>>>
>>> Is there any device which is not imperfect?
>>
>> A noise generator? :-)
>
> It's actually quite difficult to make a really good noise source.  It's easy
> to make a poor quality one, but getting one that has a truly flat spectrum
> that doesn't vary with temperature, age, etc, is tricky.

On the other hand - why would a noise generator with truly flat
spectrum be considered "good"? Nobody would prefer an oscillator or
filter completely without imperfections, and the most interesting
noise generators tend to be quite grainy-sounding or special in other
ways. :-)

"Poor quality noise" is also an interesting concept... ;-)

/mr


PS:
http://sphotos-b.xx.fbcdn.net/hphotos-snc6/264890_10152017536460183_2104554710_n.jpg