"Jerry" wrote in
:
....
What is the reasoning used to indicate 300 ohm line is used in (B)
of the
referenced http://www.vk1od.net/lost/Fig7.png .?
The figure is is from the ARRL Antenna Handbook.
In (b), the numbers are rounded. A nominal 280 ohm dipole via 1/4 wave of
400 ohm line gives 570 ohms at the tee. Two such branches are paralleled
for 285 ohms, which on 300 ohm main feed line line results in a VSWR of
1.05... should be acceptable.
Does that help?
Owen