Best scanner antenna I ever found was a discone mounted high, ~40 ft.
above ground.

I was able to pick up much traffic from even surrounding towns and
cities ... not perfect but provided more than was needed.
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Agree with that . I even use my discone antenna for transmitting on
144 -146 MHz (local repeater + Packet BBS)

Advice : If you live near salt water get a discone anttenna in stainless
steel to prevent corrosion.

Frank GM0CSZ / KN6WH