Hi LF, I will add the antenna data as far as I know: Distance of two electrodes : 12 meter, Direction : Both N-S and W-E (combines both signals). Operator : JP1ODJ - Makoto Suzuki, a friend of mine.
Hi Alex LU8YD and the others, It is confirmed to JP1ODJ (Mako) that 50 Ohms input without any matching circuit. Also JA5FP (Yuki) shows us a figure on comparison between E_field antenna (left in figu