Fred W4JLE wrote:
How can I test how well a choke balun is performing? I know how to test a
transformer balun, but am cluless as how I can compare several different
choke balun approaches.

Hi Fred, If you have an MFJ antenna analyzer it is easy. You have
to measure the choking Impedance at the frequency of interest. Rule of
thumb is 10X the transmission line or Antenna Impedance, depending on
where the the balun is located. 50 ohm impedance, 500 ohm choke
impedance.
The 259 manual has a section on testing baluns. You can download the
manual from MFJ.
Gary N4AST