Topband: T Vertical feed

[ct1ilt at sapo.pt]

Hi Everyone,

just finishing puting up a T Vertical (exactly in T shape) using 2  
supports at the ends.

The vertical portion is 18m and the T is 17m to each side (34m total).

I am laying radials from 20m - 40m (have about 20 right now).

My question is regarding the feeding of the antenna, should it be  
straight with 50 Ohm cable? Should I make some impedance transformer?  
(I have FT240-61) that I could use.

Thanks for help, getting ready here for CQ WW cw 160M.

73's Filipe CT1ILT aka CR6K