carbon fiber used as EM shield? - diyAudio
Go Back   Home > Forums > General Interest > Everything Else

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 16th December 2006, 03:46 PM   #1
diyAudio Member
 
neutron7's Avatar
 
Join Date: Dec 2003
Location: Toronto Canada
Default carbon fiber used as EM shield?

Carbon fiber conducts electricity rather well I was wondering how it would work as electromagnetic shield, or is it something else about metal that does that?

I was thinking of bulding a carbon fiber amplifier housing. since i have some of the cloth spare from another project.
  Reply With Quote
Old 16th December 2006, 06:45 PM   #2
diyAudio Member
 
I_Forgot's Avatar
 
Join Date: Jan 2005
Location: Phoenix, Az.
Carbon fiber will work as a electrostatic shield but just like aluminum, it won't help with low frequency magnetic fields.

I_F
  Reply With Quote
Old 17th December 2006, 10:53 PM   #3
diyAudio Member
 
neutron7's Avatar
 
Join Date: Dec 2003
Location: Toronto Canada
how about embedding some of this http://www.twpinc.com/twp/jsp/product.jsp?type=3
copper RFI mesh in the carbon between the layers.
  Reply With Quote
Old 17th December 2006, 11:31 PM   #4
diyAudio Member
 
I_Forgot's Avatar
 
Join Date: Jan 2005
Location: Phoenix, Az.
I don't think you need to. The copper mesh blocks RFI because it is a conductor that will ultimately be tied to the ground of your circuit. The carbon fiber will do the same thing, just as an aluminum enclosure would do the same thing. The copper mesh is normally used where you need to have shielding and air flow.

Copper is a bit better conductor than carbon fiber, so it may be slightly more effective, but how effective do you need it to be? It is one thing if you're trying for agency approval to mass produce a product and another if you're building a single device for your own use.

None of these shields (aluminum, CF, or copper mesh) will protect your circuit from low frequency fields such as those found in the vicinity of power transformers.

I_F
  Reply With Quote
Old 18th December 2006, 03:23 AM   #5
diyAudio Member
 
neutron7's Avatar
 
Join Date: Dec 2003
Location: Toronto Canada
great then you saved me $75
  Reply With Quote
Old 18th December 2006, 03:52 AM   #6
diyAudio Member
 
I_Forgot's Avatar
 
Join Date: Jan 2005
Location: Phoenix, Az.
I have been considering using it for the stators of an electrostatic speaker. It should make for a stiff, light driver.

I've been trying to figure out how to pull every other cord out of plain weave cloth so it will be perforated. I need to attach the whole cloth to a frame, then cut every other cord and pull it out. It would probably be cheaper to buy the cord and just wind it over a frame with a bunch of nails or slots spaced evenly around the perimeter.

Aircraft Spruce has 1 lb rolls of 6k tow for about $50. I figure a pound of the stuff would be good for a decent sized pair of speakers.

I'd fill the frame with the stuff, then slather on the epoxy, then vacuum bag the whole thing. After the epoxy has fully hardened cut it away from the frame. The frame will have to be a throw-away part so figuring out how to make it quickly, easily, and cheaply would be the main challenge.

I_F
  Reply With Quote
Old 19th December 2007, 05:59 PM   #7
Nordic is offline Nordic  South Africa
diyAudio Member
 
Nordic's Avatar
 
Join Date: Sep 2005
Well i'd say you can use those powedery molds similar to old fashioned sand... you make an impression in it, say, useing a wooden block, then fill it with whatever you are casting with... obviosly you need to put your wires and stuff in the prepared hole before filling...
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
carbon fiber cones? thoriated Multi-Way 21 28th January 2009 09:02 PM
DIY carbon fiber brush marekst Analogue Source 2 19th February 2008 05:17 PM
carbon fiber earing Instruments and Amps 8 13th March 2007 06:04 AM
How do I use carbon fiber + MDF wood + glass fiber to make speaker? sonyacer Multi-Way 16 10th May 2004 04:57 PM
Cutting Carbon Fiber user510 Analogue Source 6 25th December 2003 05:40 AM


New To Site? Need Help?

All times are GMT. The time now is 07:28 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2