I think I have narrowed down my issue but just looking for a little confirmation...
I volunteer as a first responder at a ski area that uses commercial HTs on 152.450 and 157.710. When I'm not on duty with one of the provided radios but still on-site, I have used my VX-7R just to monitor what is going on (in case they may need extra help in the treatment room). Lately, when compared to the provided radios, RX has static and I only catch ~50% of the transmission, if at all. This issue seems to coincide with the area switching to narrowband to meet the FCC deadline.
I've tried to do some research but haven't come up with a great single reason for my problems. I reprogrammed to 12.5kHz then 5kHz steps with no improvement. I do not have an antenna specifically tuned for the 150mHz band, but I have considered it. The specs of the radio show TX/RX in the 144-148mHz range. I am getting the sense that the VX-7R with dual band rubber duck wasn't a great solution to monitor those frequencies to begin with, but it worked. Now with the switch to narrowband, it is struggling to pick up those transmissions at all so new/different hardware specific for commercial use may be needed.
Does this make sense? I'm relatively new to the HAM/radio world and this is one of my first experiences troubleshooting. Would an antenna more specific to 150mHz solve my issues or do I need a different radio?