I have upgraded antennas already to a 6" VHF rubber duckie.
I am comparing reception side by side with a base unit/telescopic antenna.
The BC72 does not receive as well even when interchanging antennas from one another.
(scanning VHF band centered around 155 most of the time)
I've seen a couple of these (and quite a number of other Uniden radios) that have unsoldered or badly soldered antenna connections, and a little hit with an iron makes it come alive. I used to find a lot of the older RS scanners, both GRE and Uniden made that were totally out of alignment. One of the Uniden ones received better 5KHZ off freq! I don't know if parts values changed after being "broken in", or it got whacked during shipping. My Pro-2005 was very deaf on VHF until I found the alignment procedure and carefully did it. It really woke it up.