If you've got 100Mbps Ethernet in your house, you're probably already hearing noise around 14.031, unless your antenna is far, far away from your networking equipment. It's not just the cables, but also the routers and interface cards that seem to spew this stuff!
For a nice discussion of common mode currents and what to do about them, I like the paper by Chuck W1HIS at http://www.yccc.org/Articles/W1HIS/CommonModeChokesW1HIS2006Apr06.pdf Fair-rite makes a snap-on ferrite, p/n 0443164151, which snaps comfortably over three turns of RG-8X. I use two of them to make a choke at the point where my coax enters the house through a window, as well as a coil-wound balun/choke at the base of my vertical. This seems to handle the common mode problems well (but my vertical still picks up all kinds of RF from the neighborhood!) DXEngineering has similar snap-on ferrites in various sizes, too. 73 de chris K6DBG _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
