edz_mod.nec

zip contains tool for Antenna Modelling with examples

CM N6LF Extended Double Zepp, by K6STI
CE
SY L1 = 85 ft
'SY L2 = 25 ft		' original K6STI
SY L2 = 24.5 ft		' Even better
SY H = 80 ft
GW	1	9	0	L1	H	0	L2	H	#14
GW	2	9	0	L2	H	0	-L2	H	#14
GW	3	9	0	-L2	H	0	-L1	H	#14
GE	1
EX	0	2	5	00	1.0	0.0
SY C = 9.1 pf
LD	1	1	9	0	0	0	C
LD	1	3	1	0	0	0	C
'
GN	0	0	0	0	13	.005
FR	0	1	0	0	 7.15
EN

'This design has much lower sidelobes than an ordinary extended double zepp and
'exhibits a purely resistive input impedance.  These improvements cost just a
'couple tenths of a dB forward gain.