| Electronics > Beginners |
| Cable shielding audiophool or facts? |
| (1/10) > >> |
| FriedMule:
Someone I know who is a wary big audiophool told me of a new "magical" solution for shielding cables and asked me if it works, but I have not enough knowledge to decide that, hope that you will help:-) Imagine a cable. It has mounted a braided metal sleeve that are only connected to the amplifier, on top of that, there is a heat shrink tube and lastly a second braided metal sleeve only connected to the source. so that the two metal sleeves, separated by the heat shrink tube, makes a sort of capacitor with one leg on the amp and the other "leg" on the source, i.e. a CD-player. Would that have any effect on EMI or RF? EDIT: forgot to say that the one he has talked about is non balanced phono-cables, but my question is generel about that type og "magic" shielding:-) |
| RandallMcRee:
If I understand correctly your diagram is wrong--shields need to be connected somewhere to be effective. The text you describe actually makes some sense: cables that have shields connected at only one end are effective for shielding and avoiding ground loops. What you described is just two shields one connected at source and the other at destination. Henry Ott in his treatise on grounding notes that this is an effective way to cut EMI. So, yeah, like most audiophile things there is a grain of truth. As always, though, these are typically bandaids to avoid diagnosing the root cause. |
| FriedMule:
Great thanks for your answer, I know that my drawing dos not show the shields connection to the cabinets. I wanted to show the layering of the shields, not the connections. :-) So this would work effective Agains EMI? Do it work as a capacitor? How effective is it? |
| RandallMcRee:
--- Quote from: FriedMule on November 12, 2018, 01:24:14 am ---Great thanks for your answer, I know that my drawing dos not show the shields connection to the cabinets. I wanted to show the layering of the shields, not the connections. :-) So this would work effective Agains EMI? Do it work as a capacitor? How effective is it? --- End quote --- How effective? I don't know. Do some googling and figure this out yourself! Do some measurements! (In the Ott book there are a lot of variables noted, so a definitive answer is impossible w/out knowing specifics, e.g. no idea what your cable parameters are, the source impedance, etc. etc.). As a capacitor, not effective at all--cable capacitance is a side effect of construction and is an impediment to the signal not a help. At audio frequencies, and for well-designed equipment, its a non-issue. |
| Shock:
Sounds like audio triax or double insulated cable. |
| Navigation |
| Message Index |
| Next page |