This antenna was manufactured by Miguel, EA4BAS for his operation as EH4BAS/5 from IM98TL in August 2000
Gain: 11,61 dBi
F/B: 15,61 dB
(using the program QUICK YAGUI v. 4.0 by WA7RAI)
(Changing the boom to 7,32 meters, the length of the elements and the spacing)
With the same program the gain now is 12,43 dBi and the Front to Back (F/B) 35,19 dB
So, it's worth the hassle.........