rhomb1.nec

zip contains tool for Antenna Modelling with examples

CM Compromise Rhombic for 14-30 MHz from the ARRL antenna book.
CE 
GW	1	91	-188.75	0	0	0	92	0	#12/ft
GW	2	91	-188.75	0	0	0	-92	0	#12/ft
GW	3	91	0	-92	0	188.75	0	0	#12/ft
GW	4	91	0	92	0	188.75	0	0	#12/ft
GS	0	0	ft
GE	0
EX	0	1	1	00	1.0	0.0
LD	1	4	91	0	800	0	0
'
GN	-1
FR	0	1	0	0	 21
EN