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DIY Cable Gallery!! - Page 774

post #11596 of 14144
Quote:
Originally Posted by FraGGleR View Post


I have thought about buying one of those emergency foil blankets to see if it conducts like some of the mylar foil I bought from DHC.

 

That could be interesting. I see those blankets at the hardware store on occasion. They're fairly cheap too. 

post #11597 of 14144

also, EMI/RF that cause cable noise, are generally pretty long waves - gaps are not as bit a problem as you would think as far as shielding goes. 

post #11598 of 14144
Quote:
Originally Posted by limpidglitch View Post

 

You do know that mylar is PET, covered with a thin layer of usually aluminium?

Two layers of that braid will give you nearly full coverage. I'd go with that, then do a simple desktop test for efficacy.

Yes, but i was addressing the other plastic that held the aluminum mylar together, which is also PET/Plastic.

post #11599 of 14144
Quote:
Originally Posted by cssarrow View Post

I have none in stock at the moment, but will ask a supplier to have it measured for you. beerchug.gif

Cheers mate! Legend!ksc75smile.gif

post #11600 of 14144
Quote:
Originally Posted by jeremyzone View Post

Interesting discussion. What about picking up this mylar reflective sheeting from Home Depot marketed to use in greenhouses? http://www.homedepot.com/p/t/202985200?catalogId=10053&langId=-1&keyword=mylar&storeId=10051&N=5yc1v&R=202985200#.UToR9xnpaPU

That stuff looks the part. Another reason to go to home depot this weekend!

post #11601 of 14144

Sadly, I don't think the Canadian branch of home depot carries those mylar sheets. 

post #11602 of 14144

49.5 Inch by 25FT is pretty good for $30.

 

You'll have to then cut them smaller (1/2, 3/4, 1") by yourself which shouldn't be too much work.

 

I'll get some today from Home Depot and let you know if they conduct and how well it is to work with.
Oh and you can buy a 100FT for $80 which is pretty good also.

It's still cheaper to buy rolls from Alibaba though, if their minimum purchase requirement is low enough for you.


Edited by cssarrow - 3/8/13 at 2:31pm
post #11603 of 14144

Tell me again,  what possible advantage could a aluminum film bring to what kind of cable?

All I can think of is disadvantages.

post #11604 of 14144

It's used for shielding, mostly. Not many people intend to put it in the signal path.

post #11605 of 14144

Shielding for what type/use of cable?

Shielding for what type of interference?

post #11606 of 14144

I have a project where I need to control a camera lens iris.  Where did you get that female four pin socket?

post #11607 of 14144
Quote:
Originally Posted by benjaminabruzzo View Post

I have a project where I need to control a camera lens iris.  Where did you get that female four pin socket?

Follow the link I posted to Mouser for the male.  You should be able to get the female there as well.

post #11608 of 14144
Quote:
Originally Posted by Speedskater View Post

Shielding for what type/use of cable?

Shielding for what type of interference?

Most cables in studio environments, high EMI/RF interference areas (lots of noisy electrical components), etc.  USB spec also calls for an aluminum shield as well as a braided shield.

post #11609 of 14144
Quote:
Originally Posted by FraGGleR View Post

Most cables in studio environments, high EMI/RF interference areas (lots of noisy electrical components), etc.  USB spec also calls for an aluminum shield as well as a braided shield.

 

I tried to do a DIY rca interconnect.  The wire is Connex BL-Ag; it has foil shield and drain wire.  I put on a metal braided sheath.  Soldered the drain wire and braided sheath to the source's neg/ground.  Still have noise (it's low, had to crank up the volume to hear it).  My environment contains computer, monitors, so fairly noisy area.  Any thought on what else can I do to eliminate the noise?   

post #11610 of 14144

A good foil shield requires a machine to do the French fold seam.

Analog RCA interconnects need a heavy braided shield.

Balanced XRL interconnects need close tolerance machine made wire symmetry.

 

Use a high quality bulk cable from:

 

Belden

Canare

Gepco

Mogami

 

Braid for lower frequency interference,  foil for radio & TV frequency interference.

 

Note that Star-Quad does NOT reject interference as well in tests as expected!


Edited by Speedskater - 3/9/13 at 12:07pm
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