Hello....
I am hoping to make a common mode choke to use with my inverted L ( 90 feet
vertical 45 feet horizontal). From the various discussions on this reflector,
it was suggested that 5 toroid cores, # 31 mix with 7 turns of RG 213 should be
what I need. I called FAIR RITE and the largest cores they have are 2.4" X 1.4"
X 1/2", but the tech support person wasn't sure of the part number I needed. He
also scratched his head when I told him I needed the choke for 1.8 mhz and plan
to run legal limit. Has anyone built a common mode choke and could be able to
give me a more definitive answer as to part number or a better design?
Carol
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