In Reply to: Go about 10 threads down.... posted by mattcecil1@yahoo.com on April 3, 2007 at 14:02:16:
Audible hum is not caused by RF resonances, so don't install carbon fiber to cure hum.Carbon fiber sleeve material is sold for people who make their own golf club shafts and the like by Soller Composites at very reasonable prices. Look for the carbon fiber, not similar sleeving made of Kevlar or Fiberglas. Carbon fiber is a resistive material that dissipates the energy in standing RF waves on cables.
Ferrite sleeves, clamps, rings, etc. typically have their own sonic behaviors that make them worse than the RF noise.
RF noise causes resonances on most audio cables. These resonances are strong tones at particular frequencies that mix with the audio signal and produce spurious overtones. The artifacts are typically perceived as a brightness or harshness, but affect all audio frequencies. Reducing the RF resonances should clean up the treble, make the midrange warmer, and the bass more palpable.
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Follow Ups
- Carbon fiber damps RF resonances on cables; does not cure hum. - Al Sekela 09:29:05 04/04/07 (2)
- Since the problem here is RFI (radio station audible) and not hum, is CF appropriate? - hukkfinn 09:36:02 04/04/07 (1)
- Don't know. - Al Sekela 16:34:10 04/05/07 (0)