I'm recently new to GMRS and after several purchases of HT radios, I've decided to make the leap to getting a mobile radio for my Land Cruiser for my off roading adventures. After watching a couple YouTube videos, scrolling through the forums here on myGMRS.com and reading a couple Reddit posts. I've decided I want to go with a Kenwood mobile radio, specifically the TK-8180 line. I found two refurbished radios, the TK-8180 (30 watts) and the TK-8180H (45 watts). Like with most of my purchases I was going to full send on the 45 watts version till I came across a post where they stated that the 45 watts version only goes down to 10 watts on low, versus the 5 watts on low that the 30 watts version can do. Again I'm relatively new to the GMRS world so apologies if I get this wrong but seeing that the 45 watts version doesn't go down to 5 watts, that would mean I wouldn't be able to transmit on the channels 1 - 7 correct? Why is that an issue you ask? Well the group I usually go off roading with they like to stay on channel 5, they say that it's the channel that has the "least" amount of traffic on it. Despite my requests to move to a channel in the 15 - 22 channel range, I get out voted every time..
I know that there isn't a big difference from a transmitting and receiving standpoint between the 30 watts and 45 watts versions. I also know that the antenna and positioning of the antenna play a bigger role than the power levels. However is there any other differences between the two versions? Would I be missing anything if I went with the 30 watts version? The only reason I wanted the 45 watts version was for that extra bit of punching power if I ever needed it. Would I need to worry about heating issues with the 45 watts version? I plan to have it mounted on my dash since the previous owner already drilled holes for some type of radio or monitoring device. Seeing that the 8180 is a commercial radio, would I need to get my LMR license in order to legally use it? Even if I plan to use it only for GMRS purposes?
I look forward to some of the answers I get and/or feedback. Either would be greatly appreciated.