Tom Horne wrote in news:e060ba9b-fb0e-4ffd-bad0-
:

Hi

I'm anticipating converting my coax fed, ninety foot long, folded
terminated dipole to a ladder line fed folded dipole, without a
terminating resister, fed using an Icom AH-4 antenna coupler. Am I
correct in believing that the best ladder line to use for that purpose
would be the 300 Ohm type to match the nominal impedance of the folded
dipole itself.

Mostly, a TTFD would be used as a multiband antenna. If that remains the
case, the folded dipole option is probably not as good as an ordinary
centre fed dipole, and there is no special magic to the 300 ohm line.

Speaking of which, you may find the article
http://vk1od.net/transmissionline/300/davis.htm of interest, expecially if
you intend using it on 80m or below.

Owen