Benefit to using LMR-400?

[W5lz]

What?

Huh...me too. The second part about impedances is correct though. There isn't any sure way of matching impedances --by the average user--. First you have to know what two impedances are, then you have to have a means of matching them. Not many of us can do either accurately, so, don't worry about it for receiving purposes...much. There are no such things as a 'perfect' antenna. There are only antennas that get close to your expectations.

 

[Ubbe]

I was responding to the OP.

Newby here, I currently have a 75-ohm coax running as a feedline to my Uniden SDS200. A friend of mine suggested switching out the coax to an LMR-400 cable. Thoughts?

If it is long length of coax it will give a higher signal level with those weak signals you have now.
Your scanners impedance are all over the place, the same with your antenna. So the impedance doesn't matter.

Huh...me too. The second part about impedances is correct though.