[TowerTalk] Fair rite materials for choke baluns

[Richard (Rick) Karlquist]

On 7/3/2016 5:53 PM, Earl Morse wrote:
> Wide band, high power transmission line transformers are difficult to make.
> Earl
> N8SS
>

It's not so much that they are hard to make:  I have a 50 ohm to
450 ohm transformer that works well from 1.8 to 54 MHz at the
kilowatt level.  It was difficult to design, but it is not
difficult to make.  The problem is that it ONLY works from 50 ohms
to 450 ohms.  It is not a general purpose 9:1 impedance
transformer, that can, for example, transform 10 ohms to
90 ohms.  Where people get into trouble is when they are
driving some wire antenna over many octaves of bandwidth
and the impedance is all over the place (not to mention the
antenna pattern).

Rick N6RK