I have a transmitter of 350 whats fm On display I was dialed for example FWD 100 w and R 1 w and now after so much rain by a possible ray that fell, now brand FWD 100 wy R 97 W I am told that R is antenna reflection and consequently of all this, the power diminished because it is heard just a few blocks, I ask for help in how to remove that reflection attached photo of the antenna type, it is of the vertical type and Brands marked according to the frequency in which you want to put with pull out the tubes of the ends, for your help Thank you very much.

That antenna is about 20 watts. You are crazy to put so much power. You must have burned the mosfet already. Also you use RG58 cable .. Very little cable.

for that power is used coaxial coarse coarse, better uses new antenna and with range, you have to adjust it with gauge of roe, they are very good