EF154C - 4 EL.  21 MHz  Monobander 

4N1SM   4 EL.  21 MHz  MONOBANDER

 EF154C

TAPER DIMENSIONS

 
SPACING 22 16 10 1/2  ELEMENT TOTAL LENGTH
0.000 1.000 1.500 1.155 3.655 7.310
2.400 1.000 1.500 1.060 3.560 7.120
3.600 1.000 1.500 0.885 3.385 6.770
6.560 1.000 1.500 0.715 3.215 6.430

FREE SPACE GAIN       8.92 dBi       ( 6.78 dBd )

 GAIN AND PATTERN IF ANTENNA IS AT 20m A.G.