CM Example of 2m end fed halfwave antenna using a step-up transformer that is directly modeled in NEC wires. A series capacitance tames the native inductance at the feed point. CM Author: John S. Huggins, kx4o www.hamradio.me CE SY Element=1.005 SY Wirerad=.000635 SY coillen=.05 SY coilbase=0 SY tapX=.005 SY TapZ=.0075 SY CapPf=4.560774 SY CoaxLeadLen=.5 GW 1 121 0 0 coilbase+coillen 0 0 coilbase+coillen+Element Wirerad GW 2 1 TapX+.010 0 0 TapX+.01 0 TapZ/3 .00015 GW 3 1 TapX+.010 0 TapZ/3 TapX+.01 0 TapZ/3*2 .00015 GW 4 1 TapX+.010 0 TapZ/3*2 TapX+.01 0 TapZ .00015 GW 5 1 .01 0 0 TapX/2+.01 0 0 .00015 GW 6 1 TapX/2+.01 0 0 TapX+.01 0 0 .00015 GW 7 1 .01 0 TapZ TapX/2+.01 0 TapZ .00015 GW 8 1 TapX/2+.01 0 TapZ TapX+.01 0 TapZ .00015 GW 9 3 TapX+.01 0 0 TapX+.01+(CoaxLeadLen/100) 0 0 .00015 GW 101 1 .01 0 coilbase .007071 .007071 coilbase+.000313 wirerad GW 102 1 .007071 .007071 coilbase+.000313 0 .01 coilbase+.000625 wirerad GW 103 1 0 .01 coilbase+.000625 -.007071 .007071 coilbase+.000938 wirerad GW 104 1 -.007071 .007071 coilbase+.000938 -.01 0 coilbase+.00125 wirerad GW 105 1 -.01 0 coilbase+.00125 -.007071 -.007071 coilbase+.001563 wirerad GW 106 1 -.007071 -.007071 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