Secondary:
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    d =  50 mm
    h =  72 mm (85 mm form, ratio 1,44:1)
    N = 131
wired =   0,55 mm
wirel =  21 m
  RDC =   2 ohm
  RAC =   8 ohm

computed f0:     4,911 MHz
computed L:      0,447 mH
computed C:      2,351 pF
computed XL: 13787 ohm
measured f0:     4,638 MHz