Ok -- here is a suggestion ----- if the question is what is causing the cores
to heat ....
some "electric field" or ampere turns magnetizng flux.
Make a short piece of bifilar transmission line - parallel or twisted but with
insulation that will withstand heat -like teflon.
Make the line it long enough to put some 5 to 10 turns on a subject core. Set
up your tx to fed a dummy load with this
section of line/core in series and run say a Kw or so into the dummy load -
calculate the current . For this case
there should be nil amount of ampere turns magnetizng the core. Measure the
core temperature after x min or seconds
Now just disconnect the "ground " side side of the bifilar transmission line at
both ends -leave it float and insert a capacitor
of the values needed in series with the "hot' conductor to series resonate out
the inductance of that winding and run the same
power -. See what the temp is after the same X seconds or min .
----- On Sep 4, 2020, at 5:04 AM, W4TV Joe Subich <lists@subich.com> wrote:
Balun/common mode choke what is the difference? Neither
should be magnetizing the core unless you are talking
about a magnetically coupled transformer like the isolation
transformer in an FCP system.
73,
... Joe, W4TV
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