The TF3MA 30m to 15m band log periodic dipole antenna

This is 4 element antenna covering 30, 20, 17 and 15 meter bands with SWR under 2.0 on all bands, the radiation pattern is a typical dipole pattern on each band. (it is even usable on the 10m band!)
For construction see the original 20 to 10 m dipole antenna. For dimensions see the NEC listing below.
The antenna is modelled at 10.0m height above normal ground.

NEC2 Simulation results, gain and SWR.

Nec2 input file for simulation with antenna at 10m height.

CM NEC Input File for tf3ma lpda 30m til 15m
CM
CM           X and Y are horizontal(m) coordinants and Z is vertical(m).
CM
CM           X         Y         Z         X          Y         Z
CE
GW  0  31    0.00000   6.70000  10.00000   0.00000   -6.70000  10.00    0.0008
GW  1  21    0.00000   4.60000   9.20000   0.00000   -4.60000   9.20    0.0008
GW  2  19    0.00000   3.80000   8.60000   0.00000   -3.80000   8.60    0.0008
GW  3  15    0.00000   3.35000   7.90000   0.00000   -3.35000   7.90    0.0008
GE  1
EK 
GN  0  0    0    0  13.00E+00  5.00E-03  4.30E+00  1.00E-03  0.00E+00  0.00E+00
FR  0  60    0    0 9.0E+00  0.25E+00  0.00E+00  0.00E+00  0.00E+00  0.00E+00
LD  5  0    0    0 3.720E+07
LD  5  1    0    0 3.720E+07
LD  5  2    0    0 3.720E+07
LD  5  3    0    0 3.720E+07
TL  0  16   1   11 -300
TL  1  11   2   10 -300
TL  2  10   3   8 -300
EX  0  3    8    0  1.00E+00  0.00E+00  0.00E+00  0.00E+00  0.00E+00  0.00E+00
RP  0  72  72 1001 -90.00E+00  90.00E+00  5.00E+00  5.00E+00  0.00E+00  0.00E+00
PT  -1
EN

Xnecview output of simulation, radiation pattern at 10MHz.

73 de TF3MA