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The antenna that comes with the USB dongle is small. You can easily get much better signal reception by replacing it with a better antenna, or one better matched to the frequency range you want to listen to. Many of the USB dongles use a PAL connector. You can purchase IEC PAL male to BNC or SMA adapters for less than $4 on eBay. Once you have an adapter, you can easily connect another antenna.
You can purchase telescopic CB or scanner radios with BNC connectors for under $10 online.
Making your own antenna is fairly easy, too. See the projects page for instructions on making some antennas.
You can also check the giant list of frequencies.
|144.390 MHz||NFM||APRS Calling Frequency|
|147.060 MHz||NFM||W4LEE Repeater|
|147.240 MHz||NFM||K4RY 2m Repeater|
|15x.xxx MHz||NFM||Auburn Fire Dispatch|
|155.610 MHz||NFM||Auburn Police Dispatch|
|162.525 MHz||NFM||NOAA Weather Radio Station WWF54|
|444.800 MHz||NFM||K4RY 70cm Repeater|