Propeller Head Plaza

Just a bit more thing to add

118.172.48.137

This Post Has Been Edited by the Author

In Reply to: RE: You've supported Jon Risch's speaker cable idea I believe posted by kurt s on October 29, 2010 at 17:48:21

How can modulation of conductor resistance possibly cause a high frequency distortion? I have never heard this question proposed before nor answered.

But, it's feasible. RC and RL time constants shift with changing R. Now that is normally linear still and makes a first-order modulating LPF. But, C is somewhat nonlinear with amplitude as it has a dielectric with some hysteresis most of the time. If at same amplitude, different frequency, the R will change and the amplitude will change with C's low pass filtering. When the amplitude changes now, it may distort the "distortion" with the difference in the hysteresis amount of the dielectric.

Same can occur if L has any magnetism to it.

The upshot: Use the most linear dielectric for C, air if possible. And avoid magnetic material in connectors and such as well, such as nickel or iron.

-Kurt

Follow Ups:

Oh! And an afterthought possibility - kurt s 20:36:45 10/29/10 (6)
- Where are the numbers? - Tony Lauck 08:01:27 10/31/10 (5)
  - RE: Where are the numbers? - kurt s 09:35:10 10/31/10 (3)
    - RE: Where are the numbers? - Tony Lauck 10:02:58 10/31/10 (2)
      - RE: Where are the numbers? - kurt s 17:23:26 10/31/10 (1)
        
        RE: Where are the numbers? - Tony Lauck 17:56:07 10/31/10 (0)
  - numbers numbers, we don need no steenking numbers - tomservo 09:21:26 10/31/10 (0)