Hi
I am a little confused, my 1/1 balun done with FT140-43 2x10 turns with 1mm wire as illustrated by photo attached, i want to measure losses by S21 Logmag function after a good thru calibration, with renormalizing the coax Zc impedance from 50 Ohm to 78.5 Ohm it gives me the double of losses with 78.5 Ohm coax compared to 50 Ohm coax Z, i can not explaine this ? why ? see S21 responses attached , knowing that i measured the caracteristic impedance of the balun it is around 62 Ohm as showen by graphic attached here , any help ?
H4 + 1.2.40
73's Nizar
