Highland Ham wrote:
Cecil Moore's web site shows how he adds lengths of twin feeder to suit
the different bands.

If the SWR on 450 ohm ladder-line is between 4.5:1 and
18:1, the impedance at a current maximum point will be
resistive between 25 ohms and 100 ohms for an SWR on
50 ohm coax of 2:1 or less with no tuner. See the Smith
Chart at: http://www.w5dxp.com/smith.htm
--
73, Cecil http://www.w5dxp.com