MultiNEC 28.3 ft in SLT30 *** DO NOT MAKE MANUAL EDITS TO THIS FILE *** "_=IF(ISNA(UnitsFact), 1, 299.792458 / UnitsFact / B) * 0.00105" "_Min segment length, 0.00105 WL (~950 segs/WL) at min analysis freq" _7 _Min analysis freq _ Example models "_=IF(ISNA(UnitsFact), 1, 299.792458 / UnitsFact / D) * 0.04" "_Max segment length, 0.04 WL (25 segs/WL) at max analysis freq" _30 _Max analysis freq _ARRL_VB1-75 _ARRL_VB3-50 _=DEGREES(ASIN((J - K) / (G - 1.5 * AA))) "_Angle down from horizontal, deg" _Per NX5Z _ARRL_VB2-60 _106 _Leg length _106 _68.464 _136.961 _208.972 _(Leg len) _45 "_V included angle, deg" _45 _75 _60 _50 _(V angle) _40 _Height apex _40 _70 _70 _70 _(Apex hgt) _10 _Height outer ends _10 _70 _70 _70 _(End hgts) _ ****** Dimensions above are in feet ****** _#12 "_=""Wire diameter ("" & UnitsDia & "" or #)""" _>>>>> NOTE <<<<< _Be sure to set the Min/Max analysis freqs (variables B and D) _TRUE _Use Ladder Line and Balun in model? _to avoid any Segmentation Check warnings. _100 _Ladder Line length (if used) "_To use Meters instead of Feet click ""Change Units"" and choose" _the first option. Then reset variable values as desired. _For more info see the article by NX5Z in QST March 2011 _or Chapter 13 of the ARRL Antenna Book. "_Working variables, do not modify" _V-Beam "_Segmentation set automatically, do not modify." "_Click the ""Hide Marked Rows"" button (above) to show just the final wires that will be passed to EZNEC." _Center wire with feedpoint _0 _=(1.5 * AA) _=J _0 _=-(1.5 * AA) _=J _=M _3 _x "_Wires marked in column A are from intermediate steps used in model construction," _x "_starting with a basic leg which is then rotated, moved, and duplicated as necessary." _ry "_Basic element on X axis (Y=0, Z=0) with tapered segment lengths" _ry _0 _0 _0 "_=B18 + MIN(AA * 2, AB)" _0 _0 _=M _1 _ry "_=B18 + MIN(AA * 2, AB)" _0 _0 "_=B19 + MIN(AA * 4, AB)" _0 _0 _=M _1 _ry "_=B19 + MIN(AA * 4, AB)" _0 _0 "_=B20 + MIN(AA * 8, AB)" _0 _0 _=M _1 _ry "_=B20 + MIN(AA * 8, AB)" _0 _0 "_=B21 + MIN(AA * 16, AB)" _0 _0 _=M _1 _ry "_=B21 + MIN(AA * 16, AB)" _0 _0 _=G - 1.5 * AA _0 _0 _=M "_=CEILING(WireLen / AB, 1)" _m _Rotated down by drop angle AC _m "_=ROUND($B$18 * COS(RADIANS(-AC)) - $D$18 * SIN(RADIANS(-AC)), 9)" _=$C$18 "_=ROUND($B$18 * SIN(RADIANS(-AC)) + $D$18 * COS(RADIANS(-AC)), 9)" "_=ROUND($E$18 * COS(RADIANS(-AC)) - $G$18 * SIN(RADIANS(-AC)), 9)" _=$F$18 "_=ROUND($E$18 * SIN(RADIANS(-AC)) + $G$18 * COS(RADIANS(-AC)), 9)" _=M _1 _m "_=ROUND($B$19 * COS(RADIANS(-AC)) - $D$19 * SIN(RADIANS(-AC)), 9)" _=$C$19 "_=ROUND($B$19 * SIN(RADIANS(-AC)) + $D$19 * COS(RADIANS(-AC)), 9)" "_=ROUND($E$19 * COS(RADIANS(-AC)) - $G$19 * SIN(RADIANS(-AC)), 9)" _=$F$19 "_=ROUND($E$19 * SIN(RADIANS(-AC)) + $G$19 * COS(RADIANS(-AC)), 9)" _=M _1 _m "_=ROUND($B$20 * COS(RADIANS(-AC)) - $D$20 * SIN(RADIANS(-AC)), 9)" _=$C$20 "_=ROUND($B$20 * SIN(RADIANS(-AC)) + $D$20 * COS(RADIANS(-AC)), 9)" "_=ROUND($E$20 * COS(RADIANS(-AC)) - $G$20 * SIN(RADIANS(-AC)), 9)" _=$F$20 "_=ROUND($E$20 * SIN(RADIANS(-AC)) + $G$20 * COS(RADIANS(-AC)), 9)" _=M _1 _m "_=ROUND($B$21 * COS(RADIANS(-AC)) - $D$21 * SIN(RADIANS(-AC)), 9)" _=$C$21 "_=ROUND($B$21 * SIN(RADIANS(-AC)) + $D$21 * COS(RADIANS(-AC)), 9)" "_=ROUND($E$21 * COS(RADIANS(-AC)) - $G$21 * SIN(RADIANS(-AC)), 9)" _=$F$21 "_=ROUND($E$21 * SIN(RADIANS(-AC)) + $G$21 * COS(RADIANS(-AC)), 9)" _=M _1 _m "_=ROUND($B$22 * COS(RADIANS(-AC)) - $D$22 * SIN(RADIANS(-AC)), 9)" _=$C$22 "_=ROUND($B$22 * SIN(RADIANS(-AC)) + $D$22 * COS(RADIANS(-AC)), 9)" "_=ROUND($E$22 * COS(RADIANS(-AC)) - $G$22 * SIN(RADIANS(-AC)), 9)" _=$F$22 "_=ROUND($E$22 * SIN(RADIANS(-AC)) + $G$22 * COS(RADIANS(-AC)), 9)" _=M "_=CEILING(WireLen / AB, 1)" _rz _Elevated by apex height J _rz _=$B$24 _=$C$24 _=$D$24 + J _=$E$24 _=$F$24 _=$G$24 + J _=M _1 _rz _=$B$25 _=$C$25 _=$D$25 + J _=$E$25 _=$F$25 _=$G$25 + J _=M _1 _rz _=$B$26 _=$C$26 _=$D$26 + J _=$E$26 _=$F$26 _=$G$26 + J _=M _1 _rz _=$B$27 _=$C$27 _=$D$27 + J _=$E$27 _=$F$27 _=$G$27 + J _=M _1 _rz _=$B$28 _=$C$28 _=$D$28 + J _=$E$28 _=$F$28 _=$G$28 + J _=M "_=CEILING(WireLen / AB, 1)" _m _Rotated out by ±1/2 included angle H _m "_=ROUND($B$30 * COS(RADIANS(H/2)) - $C$30 * SIN(RADIANS(H/2)), 9)" "_=ROUND($B$30 * SIN(RADIANS(H/2)) + $C$30 * COS(RADIANS(H/2)), 9)" _=$D$30 "_=ROUND($E$30 * COS(RADIANS(H/2)) - $F$30 * SIN(RADIANS(H/2)), 9)" "_=ROUND($E$30 * SIN(RADIANS(H/2)) + $F$30 * COS(RADIANS(H/2)), 9)" _=$G$30 _=M _1 _m "_=ROUND($B$31 * COS(RADIANS(H/2)) - $C$31 * SIN(RADIANS(H/2)), 9)" "_=ROUND($B$31 * SIN(RADIANS(H/2)) + $C$31 * COS(RADIANS(H/2)), 9)" _=$D$31 "_=ROUND($E$31 * COS(RADIANS(H/2)) - $F$31 * SIN(RADIANS(H/2)), 9)" "_=ROUND($E$31 * SIN(RADIANS(H/2)) + $F$31 * COS(RADIANS(H/2)), 9)" _=$G$31 _=M _1 _m "_=ROUND($B$32 * COS(RADIANS(H/2)) - $C$32 * SIN(RADIANS(H/2)), 9)" "_=ROUND($B$32 * SIN(RADIANS(H/2)) + $C$32 * COS(RADIANS(H/2)), 9)" _=$D$32 "_=ROUND($E$32 * COS(RADIANS(H/2)) - $F$32 * SIN(RADIANS(H/2)), 9)" "_=ROUND($E$32 * SIN(RADIANS(H/2)) + $F$32 * COS(RADIANS(H/2)), 9)" _=$G$32 _=M _1 _m "_=ROUND($B$33 * COS(RADIANS(H/2)) - $C$33 * SIN(RADIANS(H/2)), 9)" "_=ROUND($B$33 * SIN(RADIANS(H/2)) + $C$33 * COS(RADIANS(H/2)), 9)" _=$D$33 "_=ROUND($E$33 * COS(RADIANS(H/2)) - $F$33 * SIN(RADIANS(H/2)), 9)" "_=ROUND($E$33 * SIN(RADIANS(H/2)) + $F$33 * COS(RADIANS(H/2)), 9)" _=$G$33 _=M _1 _m "_=ROUND($B$34 * COS(RADIANS(H/2)) - $C$34 * SIN(RADIANS(H/2)), 9)" "_=ROUND($B$34 * SIN(RADIANS(H/2)) + $C$34 * COS(RADIANS(H/2)), 9)" _=$D$34 "_=ROUND($E$34 * COS(RADIANS(H/2)) - $F$34 * SIN(RADIANS(H/2)), 9)" "_=ROUND($E$34 * SIN(RADIANS(H/2)) + $F$34 * COS(RADIANS(H/2)), 9)" _=$G$34 _=M "_=CEILING(WireLen / AB, 1)" _m _Separated by length of center wire (3 * AA) _Leg on +Y side with tapered segment lengths _=$B$36 _=$C$36 + (1.5 * AA) _=$D$36 _=$E$36 _=$F$36 + (1.5 * AA) _=$G$36 _=M _1 _=$B$37 _=$C$37 + (1.5 * AA) _=$D$37 _=$E$37 _=$F$37 + (1.5 * AA) _=$G$37 _=M _1 _=$B$38 _=$C$38 + (1.5 * AA) _=$D$38 _=$E$38 _=$F$38 + (1.5 * AA) _=$G$38 _=M _1 _=$B$39 _=$C$39 + (1.5 * AA) _=$D$39 _=$E$39 _=$F$39 + (1.5 * AA) _=$G$39 _=M _1 _=$B$40 _=$C$40 + (1.5 * AA) _=$D$40 _=$E$40 _=$F$40 + (1.5 * AA) _=$G$40 _=M "_=CEILING(WireLen / AB, 1)" _m "_=ROUND($B$30 * COS(RADIANS(-H/2)) - $C$30 * SIN(RADIANS(-H/2)), 9)" "_=ROUND($B$30 * SIN(RADIANS(-H/2)) + $C$30 * COS(RADIANS(-H/2)), 9)" _=$D$30 "_=ROUND($E$30 * COS(RADIANS(-H/2)) - $F$30 * SIN(RADIANS(-H/2)), 9)" "_=ROUND($E$30 * SIN(RADIANS(-H/2)) + $F$30 * COS(RADIANS(-H/2)), 9)" _=$G$30 _=M _1 _m "_=ROUND($B$31 * COS(RADIANS(-H/2)) - $C$31 * SIN(RADIANS(-H/2)), 9)" "_=ROUND($B$31 * SIN(RADIANS(-H/2)) + $C$31 * COS(RADIANS(-H/2)), 9)" _=$D$31 "_=ROUND($E$31 * COS(RADIANS(-H/2)) - $F$31 * SIN(RADIANS(-H/2)), 9)" "_=ROUND($E$31 * SIN(RADIANS(-H/2)) + $F$31 * COS(RADIANS(-H/2)), 9)" _=$G$31 _=M _1 _m "_=ROUND($B$32 * COS(RADIANS(-H/2)) - $C$32 * SIN(RADIANS(-H/2)), 9)" "_=ROUND($B$32 * SIN(RADIANS(-H/2)) + $C$32 * COS(RADIANS(-H/2)), 9)" _=$D$32 "_=ROUND($E$32 * COS(RADIANS(-H/2)) - $F$32 * SIN(RADIANS(-H/2)), 9)" "_=ROUND($E$32 * SIN(RADIANS(-H/2)) + $F$32 * COS(RADIANS(-H/2)), 9)" _=$G$32 _=M _1 _m "_=ROUND($B$33 * COS(RADIANS(-H/2)) - $C$33 * SIN(RADIANS(-H/2)), 9)" "_=ROUND($B$33 * SIN(RADIANS(-H/2)) + $C$33 * COS(RADIANS(-H/2)), 9)" _=$D$33 "_=ROUND($E$33 * COS(RADIANS(-H/2)) - $F$33 * SIN(RADIANS(-H/2)), 9)" "_=ROUND($E$33 * SIN(RADIANS(-H/2)) + $F$33 * COS(RADIANS(-H/2)), 9)" _=$G$33 _=M _1 _m "_=ROUND($B$34 * COS(RADIANS(-H/2)) - $C$34 * SIN(RADIANS(-H/2)), 9)" "_=ROUND($B$34 * SIN(RADIANS(-H/2)) + $C$34 * COS(RADIANS(-H/2)), 9)" _=$D$34 "_=ROUND($E$34 * COS(RADIANS(-H/2)) - $F$34 * SIN(RADIANS(-H/2)), 9)" "_=ROUND($E$34 * SIN(RADIANS(-H/2)) + $F$34 * COS(RADIANS(-H/2)), 9)" _=$G$34 _=M "_=CEILING(WireLen / AB, 1)" _Leg on -Y side with tapered segment lengths _=$B$48 _=$C$48 + (-1.5 * AA) _=$D$48 _=$E$48 _=$F$48 + (-1.5 * AA) _=$G$48 _=M _1 _=$B$49 _=$C$49 + (-1.5 * AA) _=$D$49 _=$E$49 _=$F$49 + (-1.5 * AA) _=$G$49 _=M _1 _=$B$50 _=$C$50 + (-1.5 * AA) _=$D$50 _=$E$50 _=$F$50 + (-1.5 * AA) _=$G$50 _=M _1 _=$B$51 _=$C$51 + (-1.5 * AA) _=$D$51 _=$E$51 _=$F$51 + (-1.5 * AA) _=$G$51 _=M _1 _=$B$52 _=$C$52 + (-1.5 * AA) _=$D$52 _=$E$52 _=$F$52 + (-1.5 * AA) _=$G$52 _=M "_=CEILING(WireLen / AB, 1)" _Source at port 1 of balun/xfmr *or* at antenna feedpoint _(Not used if P = False) _V1 _1 _0 _V "_=IF(P, """", ""X"")" _V1 _V2 _1 _4 _N "_=IF(P, """", ""X"")" _1 _50 _1 _0 _V "_=IF(P, ""X"", """")" _(Not used if P = False) _V2 _1 _50 _=Q "_=TLParms(L77, 395, 0.902, 0.077708, 0.078862, 0.0009, 100, ""Ro"", 88)" "_=TLParms(L77, 395, 0.902, 0.077708, 0.078862, 0.0009, 100, ""VF"", 88)" _N "_=TLParms(L77, 395, 0.902, 0.077708, 0.078862, 0.0009, 100, ""dB"", 88)" _=Freq "_=IF(P, """", ""X"")" _Wireman 553 Ladder Line Controls FALSE TRUE 2 4 1 0 20 1 50 0 20 FALSE TRUE _1 _0 _Freq (MHz) _7.15 _10.12 _14.15 _18.11 _21.2 _24.93 _28.3 8