Richard Clark wrote:
On Thu, 20 Mar 2008 22:43:25 GMT, "Barrett"
wrote:

I don't
want to do this if the S0239 socket is going to allow the feed line

Feedline radiation is a consequence of common mode currents. Common
mode currents are a consequence of unbalance. Coax systems are
unbalanced. To correct this, you need to choke the coax line at the
feed point, and probably again a quarterwave away from the feedpoint.

Coax feedlines are no more or less balanced than twinlead lines. Common
mode current can occur on either, and for the same reasons, and either
can be balanced by suppressing or avoiding creation of common mode
current. The topic is discussed in more detail at
http://eznec.com/Amateur/Articles/Baluns.pdf.

Roy Lewallen, W7EL