Original 50 ohms "5-8" Gain vs. isotr. Rad. 13.09 dBi T_ant 249 K* G/T -10.89 dB
DK7ZB's 28 ohms interpretation Gain vs. isotr. Rad. 13.20 dBi T_ant 255 K* G/T -10.87 dB*
Fine tuned 28 ohms version Gain vs. isotr. Rad. 13.15dBi T_ant 250 K* G/T -10.83 dB*