hi.
i have a transmitter about 150 watt (output an 813 tube 1400vdc) at 1431khz (salonika greece) and the antenna that i'm using is an inverted L antenna (with a less than 5l/16 length ,about 20m vertical segment and 40m horizontal segment). the coupler that i'm using now is l-type . at http://www.geocities.com/tzitzikas_ee/antenna.gif you can see a schematic of my coupler.
i would like to improve the efficiency of my antenna.
i would like to ask you which inverted L lenght is better for stronger local signals:
1/2, 3/8, 5/16, 5/8 or 1/2 wavelenght? thanks