I have three different bifilar wound ferrite rod chokes. A homebrew choke measuring 127uH A B&W FC-25A measuring 44uH. An Ameritron/MFJ #10-15115-1 measuring 19uH. The measurements were taken on one winding with an Elenco LCR meter. Which one would best for grounded-grid 813's operating 160m thru 20m? Thanks, Steve KK7UV