hel10ua.nec

zip contains tool for Antenna Modelling with examples

CE AF9Y 10 Ft 437.1 Mhz Helix 
SY D = .25
SY MATCH = -0.50
SY RR = 5.30
SY HR = 5.13
SY RP = .375
SY ER = 4.21
SY MR = 4.32
SY Z0 = .3203
SY X1 = HR
SY X2 = 0.9239*HR
SY X3 = 0.7071*HR
SY X4 = 0.3827*HR
SY Y2 = X4
SY Y3 = X3
SY Y4 = X2
SY Y5 = X1
SY RX1 = RR
SY RX2 = 0.9239*RR
SY RX3 = 0.7071*RR
SY RX4 = 0.3827*RR
SY RY2 = RX4
SY RY3 = RX3
SY RY4 = RX2
SY RY5 = RX1
SY EX1 = ER
SY EX2 = 0.9239*ER
SY EX3 = 0.7071*ER
SY EX4 = 0.3827*ER
SY EY2 = EX4
SY EY3 = EX3
SY EY4 = EX2
SY EY5 = EX1
SY MX1 = MR
SY MX2 = 0.9239*MR
SY MX3 = 0.7071*MR
SY MX4 = 0.3827*MR
SY MY2 = MX4
SY MY3 = MX3
SY MY4 = MX2
SY MY5 = MX1
GW	1	3	RR	0	RP	RX2	RY2	RP	D
GW	2	3	RX2	RY2	RP	RX3	RY3	RP	D
GW	3	3	RX3	RY3	RP	RX4	RY4	RP	D
GW	4	3	RX4	RY4	RP	0	RR	RP	D
GW	5	3	0	RR	RP	-RX4	RY4	RP	D
GW	6	3	-RX4	RY4	RP	-RX3	RY3	RP	D
GW	7	3	-RX3	RY3	RP	-RX2	RY2	RP	D
GW	8	3	-RX2	RY2	RP	-RR	0	RP	D
GW	9	3	-RR	0	RP	-RX2	-RY2	RP	D
GW	10	3	-RX2	-RY2	RP	-RX3	-RY3	RP	D
GW	11	3	-RX3	-RY3	RP	-RX4	-RY4	RP	D
GW	12	3	-RX4	-RY4	RP	0	-RR	RP	D
GW	13	3	0	-RR	RP	RX4	-RY4	RP	D
GW	14	3	RX4	-RY4	RP	RX3	-RY3	RP	D
GW	15	3	RX3	-RY3	RP	RX2	-RY2	RP	D
GW	16	3	RX2	-RY2	RP	RR	0	RP	D
GW	17	1	RR	0	RP	HR	0	MATCH	D
GW	18	3	HR	0	MATCH	X2	Y2	0.32	D
GW	19	3	X2	Y2	0.32	X3	Y3	0.64	D
GW	20	3	X3	Y3	0.64	X4	Y4	0.96	D
GW	21	3	X4	Y4	0.96	0	HR	1.28	D
GW	22	3	0	HR	1.28	-X4	Y4	1.60	D
GW	23	3	-X4	Y4	1.60	-X3	Y3	1.92	D
GW	24	3	-X3	Y3	1.92	-X2	Y2	2.24	D
GW	25	3	-X2	Y2	2.24	-HR	0	2.56	D
GW	26	3	-HR	0	2.56	-X2	-Y2	2.88	D
GW	27	3	-X2	-Y2	2.88	-X3	-Y3	3.20	D
GW	28	3	-X3	-Y3	3.20	-X4	-Y4	3.52	D
GW	29	3	-X4	-Y4	3.52	0	-HR	3.84	D
GW	30	3	0	-HR	3.84	X4	-Y4	4.16	D
GW	31	3	X4	-Y4	4.16	X3	-Y3	4.48	D
GW	32	3	X3	-Y3	4.48	X2	-Y2	4.80	D
GW	33	3	X2	-Y2	4.80	HR	0	5.12	D
GW	34	3	HR	0	5.12	X2	Y2	5.45	D
GW	35	3	X2	Y2	5.45	X3	Y3	5.77	D
GW	36	3	X3	Y3	5.77	X4	Y4	6.09	D
GW	37	3	X4	Y4	6.09	0	HR	6.41	D
GW	38	3	0	HR	6.41	-X4	Y4	6.73	D
GW	39	3	-X4	Y4	6.73	-X3	Y3	7.05	D
GW	40	3	-X3	Y3	7.05	-X2	Y2	7.37	D
GW	41	3	-X2	Y2	7.37	-HR	0	7.69	D
GW	42	3	-HR	0	7.69	-X2	-Y2	8.01	D
GW	43	3	-X2	-Y2	8.01	-X3	-Y3	8.33	D
GW	44	3	-X3	-Y3	8.33	-X4	-Y4	8.65	D
GW	45	3	-X4	-Y4	8.65	0	-HR	8.97	D
GW	46	3	0	-HR	8.97	X4	-Y4	9.29	D
GW	47	3	X4	-Y4	9.29	X3	-Y3	9.61	D
GW	48	3	X3	-Y3	9.61	X2	-Y2	9.93	D
GW	49	3	X2	-Y2	9.93	HR	0	10.25	D
GW	50	3	HR	0	10.25	X2	Y2	10.57	D
GW	51	3	X2	Y2	10.57	X3	Y3	10.89	D
GW	52	3	X3	Y3	10.89	X4	Y4	11.21	D
GW	53	3	X4	Y4	11.21	0	HR	11.53	D
GW	54	3	0	HR	11.53	-X4	Y4	11.85	D
GW	55	3	-X4	Y4	11.85	-X3	Y3	12.17	D
GW	56	3	-X3	Y3	12.17	-X2	Y2	12.49	D
GW	57	3	-X2	Y2	12.49	-HR	0	12.81	D
GW	58	3	-HR	0	12.81	-X2	-Y2	13.13	D
GW	59	3	-X2	-Y2	13.13	-X3	-Y3	13.45	D
GW	60	3	-X3	-Y3	13.45	-X4	-Y4	13.77	D
GW	61	3	-X4	-Y4	13.77	0	-HR	14.09	D
GW	62	3	0	-HR	14.09	X4	-Y4	14.41	D
GW	63	3	X4	-Y4	14.41	X3	-Y3	14.73	D
GW	64	3	X3	-Y3	14.73	X2	-Y2	15.05	D
GW	65	3	X2	-Y2	15.05	HR	0	15.37	D
GW	66	3	HR	0	15.37	X2	Y2	15.69	D
GW	67	3	X2	Y2	15.69	X3	Y3	16.02	D
GW	68	3	X3	Y3	16.02	X4	Y4	16.34	D
GW	69	3	X4	Y4	16.34	0	HR	16.66	D
GW	70	3	0	HR	16.66	-X4	Y4	16.98	D
GW	71	3	-X4	Y4	16.98	-X3	Y3	17.30	D
GW	72	3	-X3	Y3	17.30	-X2	Y2	17.62	D
GW	73	3	-X2	Y2	17.62	-HR	0	17.94	D
GW	74	3	-HR	0	17.94	-X2	-Y2	18.26	D
GW	75	3	-X2	-Y2	18.26	-X3	-Y3	18.58	D
GW	76	3	-X3	-Y3	18.58	-X4	-Y4	18.90	D
GW	77	3	-X4	-Y4	18.90	0	-HR	19.22	D
GW	78	3	0	-HR	19.22	X4	-Y4	19.54	D
GW	79	3	X4	-Y4	19.54	X3	-Y3	19.86	D
GW	80	3	X3	-Y3	19.86	X2	-Y2	20.18	D
GW	81	3	X2	-Y2	20.18	MR	0	20.50	D
GW	82	3	MR	0	20.50	MX2	MY2	20.82	D
GW	83	3	MX2	MY2	20.82	MX3	MY3	21.14	D
GW	84	3	MX3	MY3	21.14	MX4	MY4	21.46	D
GW	85	3	MX4	MY4	21.46	0	MR	21.78	D
GW	86	3	0	MR	21.78	-MX4	MY4	22.10	D
GW	87	3	-MX4	MY4	22.10	-MX3	MY3	22.42	D
GW	88	3	-MX3	MY3	22.42	-MX2	MY2	22.74	D
GW	89	3	-MX2	MY2	22.74	-MR	0	23.06	D
GW	90	3	-MR	0	23.06	-MX2	-MY2	23.38	D
GW	91	3	-MX2	-MY2	23.38	-MX3	-MY3	23.70	D
GW	92	3	-MX3	-MY3	23.70	-MX4	-MY4	24.02	D
GW	93	3	-MX4	-MY4	24.02	0	-MR	24.34	D
GW	94	3	0	-MR	24.34	MX4	-MY4	24.66	D
GW	95	3	MX4	-MY4	24.66	MX3	-MY3	24.98	D
GW	96	3	MX3	-MY3	24.98	MX2	-MY2	25.30	D
GW	97	3	MX2	-MY2	25.30	MR	0	25.62	D
GW	98	3	MR	0	25.62	MX2	MY2	25.94	D
GW	99	3	MX2	MY2	25.94	MX3	MY3	26.26	D
GW	100	3	MX3	MY3	26.26	MX4	MY4	26.58	D
GW	101	3	MX4	MY4	26.58	0	MR	26.91	D
GW	102	3	0	MR	26.91	-MX4	MY4	27.23	D
GW	103	3	-MX4	MY4	27.23	-MX3	MY3	27.55	D
GW	104	3	-MX3	MY3	27.55	-MX2	MY2	27.87	D
GW	105	3	-MX2	MY2	27.87	-MR	0	28.19	D
GW	106	3	-MR	0	28.19	-MX2	-MY2	28.51	D
GW	107	3	-MX2	-MY2	28.51	-MX3	-MY3	28.83	D
GW	108	3	-MX3	-MY3	28.83	-MX4	-MY4	29.15	D
GW	109	3	-MX4	-MY4	29.15	0	-MR	29.47	D
GW	110	3	0	-MR	29.47	MX4	-MY4	29.79	D
GW	111	3	MX4	-MY4	29.79	MX3	-MY3	30.11	D
GW	112	3	MX3	-MY3	30.11	MX2	-MY2	30.43	D
GW	113	3	MX2	-MY2	30.43	MR	0	30.75	D
GW	114	3	MR	0	30.75	MX2	MY2	31.07	D
GW	115	3	MX2	MY2	31.07	MX3	MY3	31.39	D
GW	116	3	MX3	MY3	31.39	MX4	MY4	31.71	D
GW	117	3	MX4	MY4	31.71	0	MR	32.03	D
GW	118	3	0	MR	32.03	-MX4	MY4	32.35	D
GW	119	3	-MX4	MY4	32.35	-MX3	MY3	32.67	D
GW	120	3	-MX3	MY3	32.67	-MX2	MY2	32.99	D
GW	121	3	-MX2	MY2	32.99	-MR	0	33.31	D
GW	122	3	-MR	0	33.31	-MX2	-MY2	33.63	D
GW	123	3	-MX2	-MY2	33.63	-MX3	-MY3	33.95	D
GW	124	3	-MX3	-MY3	33.95	-MX4	-MY4	34.27	D
GW	125	3	-MX4	-MY4	34.27	0	-MR	34.59	D
GW	126	3	0	-MR	34.59	MX4	-MY4	34.91	D
GW	127	3	MX4	-MY4	34.91	MX3	-MY3	35.23	D
GW	128	3	MX3	-MY3	35.23	MX2	-MY2	35.55	D
GW	129	3	MX2	-MY2	35.55	MR	0	35.87	D
GW	130	3	MR	0	35.87	MX2	MY2	36.19	D
GW	131	3	MX2	MY2	36.19	MX3	MY3	36.51	D
GW	132	3	MX3	MY3	36.51	MX4	MY4	36.83	D
GW	133	3	MX4	MY4	36.83	0	MR	37.15	D
GW	134	3	0	MR	37.15	-MX4	MY4	37.48	D
GW	135	3	-MX4	MY4	37.48	-MX3	MY3	37.80	D
GW	136	3	-MX3	MY3	37.80	-MX2	MY2	38.12	D
GW	137	3	-MX2	MY2	38.12	-MR	0	38.44	D
GW	138	3	-MR	0	38.44	-MX2	-MY2	38.76	D
GW	139	3	-MX2	-MY2	38.76	-MX3	-MY3	39.08	D
GW	140	3	-MX3	-MY3	39.08	-MX4	-MY4	39.40	D
GW	141	3	-MX4	-MY4	39.40	0	-MR	39.72	D
GW	142	3	0	-MR	39.72	MX4	-MY4	40.04	D
GW	143	3	MX4	-MY4	40.04	MX3	-MY3	40.36	D
GW	144	3	MX3	-MY3	40.36	MX2	-MY2	40.68	D
GW	145	3	MX2	-MY2	40.68	MR	0	41.00	D
GW	146	3	MR	0	41.00	MX2	MY2	41.32	D
GW	147	3	MX2	MY2	41.32	MX3	MY3	41.64	D
GW	148	3	MX3	MY3	41.64	MX4	MY4	41.96	D
GW	149	3	MX4	MY4	41.96	0	MR	42.28	D
GW	150	3	0	MR	42.28	-MX4	MY4	42.60	D
GW	151	3	-MX4	MY4	42.60	-MX3	MY3	42.92	D
GW	152	3	-MX3	MY3	42.92	-MX2	MY2	43.24	D
GW	153	3	-MX2	MY2	43.24	-MR	0	43.56	D
GW	154	3	-MR	0	43.56	-MX2	-MY2	43.88	D
GW	155	3	-MX2	-MY2	43.88	-MX3	-MY3	44.20	D
GW	156	3	-MX3	-MY3	44.20	-MX4	-MY4	44.52	D
GW	157	3	-MX4	-MY4	44.52	0	-MR	44.84	D
GW	158	3	0	-MR	44.84	MX4	-MY4	45.16	D
GW	159	3	MX4	-MY4	45.16	MX3	-MY3	45.48	D
GW	160	3	MX3	-MY3	45.48	MX2	-MY2	45.80	D
GW	161	3	MX2	-MY2	45.80	MR	0	46.12	D
GW	162	3	MR	0	46.12	MX2	MY2	46.44	D
GW	163	3	MX2	MY2	46.44	MX3	MY3	46.76	D
GW	164	3	MX3	MY3	46.76	MX4	MY4	47.08	D
GW	165	3	MX4	MY4	47.08	0	MR	47.40	D
GW	166	3	0	MR	47.40	-MX4	MY4	47.72	D
GW	167	3	-MX4	MY4	47.72	-MX3	MY3	48.05	D
GW	168	3	-MX3	MY3	48.05	-MX2	MY2	48.37	D
GW	169	3	-MX2	MY2	48.37	-MR	0	48.69	D
GW	170	3	-MR	0	48.69	-MX2	-MY2	49.01	D
GW	171	3	-MX2	-MY2	49.01	-MX3	-MY3	49.33	D
GW	172	3	-MX3	-MY3	49.33	-MX4	-MY4	49.65	D
GW	173	3	-MX4	-MY4	49.65	0	-MR	49.97	D
GW	174	3	0	-MR	49.97	MX4	-MY4	50.29	D
GW	175	3	MX4	-MY4	50.29	MX3	-MY3	50.61	D
GW	176	3	MX3	-MY3	50.61	MX2	-MY2	50.93	D
GW	177	3	MX2	-MY2	50.93	MR	0	51.25	D