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.
73,
Steve G3TXQ
On 19/02/2013 14:10, Jim Thomson wrote:
If the antenna has an impedance of 50 Ohms, and the coax is close to a
quarter-wave or odd multiple long, you'll see an SWR(50) of 2.25:1 at
the shack end instead of 1:1.
73,
Steve G3TXQ
## I thought it would be just 75/50 = 1.5:1
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