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Extra shielding around outside of snake cable?
Posted: Mon Feb 18, 2008 3:28 pm
by Andyman
Hey Everybody,
What are your thoughts on the Following:
A: Constructing a trough out of 2 or 3 layers of sheet lead for extra shielding to encase a snake/bundle of mic cables.
B: Wrapping a couple of layers of lead tape around a snake cable/bunde of mic cables.
Would either option help To reject Interference in cases where the interference is more prevelent on longer cable runs?
If so, How effective would it be?
How much better is the rejection when comparing say a 50' Mogami cable to a Run of the Mill cheap store brand cable like say Yorkville?
Posted: Tue Feb 19, 2008 1:09 am
by Speedskater
Lead is great for blocking sound and X-rays, but for shielding I thing that a soft steel pipe would work better.
Posted: Tue Feb 19, 2008 2:43 am
by DCinFrance
I'll go out on a limb here as I'm not an electrician, but for shielding of any kind to be effective must go to earth ground.
Posted: Tue Feb 19, 2008 11:13 am
by Aaronw
What you're referring to is a faraday cage. It's usually a copper mesh (panels) and are attached together and grounded.
Problem with these though...EXPENSIVE, and to really be effective, you would have to shield the entire studio.
Posted: Tue Feb 19, 2008 12:10 pm
by Andyman
thanks for the info fellas
Re: Extra shielding around outside of snake cable?
Posted: Wed Mar 05, 2008 1:49 am
by EK Sound
As Speedskater mentioned, lead will be useless for RF / EMF sheilding. Plain old galvanized HVAC ducting would do fine if properly bonded to each other, then subsequently grounded. The only benefit I can see this being is if you are in a high interference area (close to a cell tower or radio tranmitter), and your cable runs are several hundred feet. Using higher quality cable will provide better results with a lower cost in the end. Wrapping the snake cable in sheilding would increase its capacitance and you would lose high end response over distance.
Dave.
Andyman wrote:Hey Everybody,
What are your thoughts on the Following:
A: Constructing a trough out of 2 or 3 layers of sheet lead for extra shielding to encase a snake/bundle of mic cables.
B: Wrapping a couple of layers of lead tape around a snake cable/bunde of mic cables.
Would either option help To reject Interference in cases where the interference is more prevelent on longer cable runs?
If so, How effective would it be?
How much better is the rejection when comparing say a 50' Mogami cable to a Run of the Mill cheap store brand cable like say Yorkville?
Posted: Wed Mar 05, 2008 2:06 am
by Speedskater
The capacitance will be between this pipe and the snakes shield. Both are at or near ground potential so it won't affect high frequency response.