General comment on the thread: Aren't radio suppressed ignition wires carbon fiber? Conductivity of pure carbon isn't bad, it just needs to be really loaded up to do the deed. The material is used extensively in resistors and varistors. I have used carbon inks and related carbon based materials in the electronics industry for years... they have their place, but maybe not with radios or antennas.
Years ago, during a seminar series on Taguchi's methods of design of experiments (that I think he derived from Deming's work), the MSOE instructor running the class opened each one with the statement, "in God we trust, everyone else brings data": does anyone on this forum have data, I'd be interested because I'll be where you are eventually. Thanks! JMHO Mark Wegmet N952MW -----Original Message----- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf Of Mark Langford Sent: Tuesday, February 09, 2010 5:07 PM To: KRnet Subject: Re: KR> Antenna Questions/Carbon Fibre/Graphite Larry Howell wrote: > If one were to take a graphite arrow rod for example, place copper tape > lengthwise on the arrow shaft, wrap the tape completely around it, attach > appropriate toroids, soldering and wiring to radio of course. Would the > graphite tube in the center, (which we all know is conductive and > reflective) reflect the radio signal in a 360 degree radius, (which is > what we would want) away from the arrow shaft or would it (the shaft) just > screw up the ability of the copper tape to be an antenna?< My guess is that would work fine. We kicked this around at work the other day. I can't say exactly what we were working on, but question of carbon fiber conductivity came up, especially with relation to EMF. We did a lab test where a piece of aluminum was heavily influenced, but a two-layer scrap of carbon fiber layup left over from my KR wings exhibited no such behavior. And resistance was infinite on the surface between any two given points. Sliding the copper foil down into the tube like I did would be problematic though... Mark Langford N56ML "at" hiwaay.net website at http://www.N56ML.com -------------------------------------------------------- _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
