DIY Cable Gallery!! - Page 774

Quote:

Originally Posted by FraGGleR 


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. 

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. 

Quote:

Originally Posted by limpidglitch 

 

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.

Quote:

Originally Posted by cssarrow 

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

Cheers mate! Legend!

Quote:

Originally Posted by jeremyzone 

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!

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

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.

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

All I can think of is disadvantages.

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

Shielding for what type/use of cable?

Shielding for what type of interference?

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

Quote:

Originally Posted by benjaminabruzzo 

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.

Quote:

Originally Posted by Speedskater 

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.

Quote:

Originally Posted by FraGGleR 

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?   

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!