Balanced line impedance

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Ylli

Joined Nov 13, 2015
978
Having a brain block here. If you use two 75 ohm coax cables as shown, is that equivalent to a 150 ohm balanced line or equivalent to a 300 ohm balanced line?
Annotation 2020-09-04 162022.jpg
 

nsaspook

Joined Aug 27, 2009
7,591
If we assume the source is balanced as is the load it's twice the coax impedance. Balanced transmission line are in series so the impedances add.
 
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