[Elecraft] Feed Line advice to KAT100

[Nigel]

Would welcome advice from the more experienced on a suggested feed line
arrangement.

I am erecting a horizontal loop (more rectangular than square) which will be
95 to 105 metres in circumference, up about 8 to 10 metres.    This is to be
connected to a KAT100 tuner.   The loop configuration has been chosen as the
K2 is on second floor and this enables the feed line length to be only 5
metres in anticipation of high swrs and potentially high feed line losses.
Also for low neighbour visibility.     The loop passes through trees to be
in the clear but it is not possible to reduce the length to 80m, and tune it
to the CW parts of the bands, without hitting tree branches.    I will be
operating 80 through 20m
Thoughts for the feed line are:-

1) Use 5M of RG213 from Ant to tuner

2) Use 3M 450 ohm ladder line to Balun (BL1 4:1) and then 2m coax. (this
gets the balun out of the weather.

3) Balun at the ant (?:1) plus RG213 to tuner

Which of the above is considered preferable and why?   Other suggestions?
Thanks
-- 
73,  Nigel, ZL2DF