In article ,
Cecil Moore wrote:

Roy Lewallen wrote:
So any core you put over the coax doesn't
see or interact with the common mode current or its fields at all, and
you can completely ignore it when analyzing balun action.

Roy probably meant "differential" above instead of "common".
Cores on coax definitely "interact with the common mode current
or its fields" and that is their purpose.

ok so after reading all this, wich i enjoyed, confused me a bit.

lets say i operate 10-160m and 6m (all band antenna)
, at max 500wout. (typically 200w)

who makes a good commercial choke balun"" w/so239's at the ends??


make/model/where to buy, ??


i've been using a w2du, lots have told me it's not the 'best' money
isn't the issue i'd just like to get a 'good one' ie efficient


thanks

any tips appreciated