[TowerTalk] 75 ohm - v - 50 ohm coax

[Jim Brown]

On 2/19/2013 10:54 AM, Steve Hunt wrote:
> The SWR on the 75 Ohm line will be 1.5:1, but if the line is a 
> quarter-wave or odd multiple long, the 50 Ohm load impedance is 
> transformed to 75*1.5 or 112.5 Ohms - that's an SWR(50) of 2.25:1.
>
> In fact any line length between 0.15 wavelength and 0.35 wavelength 
> will transform the load impedance to produce an SWR(50) greater than 2:1.

My, my -- some of us do work pretty hard to find worst case scenarios.

73, Jim K9YC