On Sat, 16 Aug 2008 11:22:52 -0400, Tom W8JI wrote: >Moving the balun to the input of an unbalanced network does >NOT make life on the balun or the system easier for the >truly difficult problem, common mode isolation.
I strongly agree with all of this. One of the most important functions of a common mode choke is decoupling noise received on the transmission line from antenna. Obviously, the same configuration also is most effective at decoupling transmit RF from the transmission line and preventing pattern distortion. It is most effective at doing this if it is at the feedpoint (that is, up in the air). 73, Jim K9YC _______________________________________________ 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
