1:49 UNUN using two stacked FT240-43 cores for endfed halfwave antenna
1:49 UNUN using two stacked FT240-43 cores for end fed halfwave antenna In order to match the end fed half wave antenna to the coaxial feeder, it is necessary to have a matching network or transmission line transformer. The coaxial feeder is likely to be 50Ω and the antenna impedance is possibly around 4000 or …