[TowerTalk] W0IYH Feed line Choke Performance

[Jim Smith]

Wow, this is fabulous.  Since my return to ham radio 3 yrs ago after 
several decades I figured I should put some baluns on my dipoles so did 
a little reading and ran into something called a current balun or choke. 
 Never heard of that back in the 60s.  Further monitoring of TT revealed 
to me what a current choke is and what it does.  Then there was the 
quandary as to whether to coil up some coax and, if so, how much or 
whether to use ferrite beads and, if so, how many and what kind.  Then 
came the reference to WA2SRQ (not SQR as in my original post) and his 
measurements.  Now we're getting somehwere.  Then this instructive 
thread on the W0IYH units.  Then all the fabulous info responding to my 
post with respect to desireable choke impedance, where to place them 
(including measurement techniques so it isn't just rule of thumb stuff) 
and even whether you might want to use more than one.  Not only that, 
info on all the reasons why you don't want current on the outside of the 
coax and how to measure how much you have.

These last few posts are the best stuff I have ever read on baluns and I 
have read quite a bit.  It's down-to-earth practical advice along with a 
rationale which makes sense.  Thanks a lot guys for taking the time to 
post this stuff.

Long live TowerTalk (and Steve)

73 de Jim Smith    VE7FO