I've tried several antennas and can't get the SWR below 2. Is there something I have set wrong on the radio? Right now I have a ARX-220 antenna.
The Kenwood TM-2530 is a 2m radio, not 220 MHz, therefore I would expect a bad SWR if you tried it with an ARX-220 antenna. The TM-3
530 was the 220 MHz version.