The absolute best way to know is to check with the radio manufacturer to determine what voltage range is acceptable. Some, but very few, manufacturers actually publish this information. That said, you are probably ok, and here is why I say that. Manufacturer’s have done us a disservice. They call the radios ‘12v’ radios but their radios are actually designed for use in a vehicle that is operating on 13.8v and not 12v. The higher voltage exists because the vehicle battery needs a higher voltage to be charged. Consequently 13.8v is the voltage most everything in the car is designed around. Also, when a lead acid battery is charged, a charger may delivery up to 14.4 volts under certain conditions to top it off, this exposing all other electronics in the vehicle to that as well. So where does that leave us? I imagine you are measuring your power supply without a load on it and that you’re getting 14.5v. This is just slightly above the normal max that the alternator would generate to charge a battery. If you put a load on your power supply, you will find that the voltage drops, perhaps down to 13.8 or even lower, right where you expect to be. The better the power supply design, the less variance in output voltage between load and no-load conditions. I just recently read a spec on a mobile radio where the manufacturer actually published its usable voltage range for its 12v Radio. It was published as 13.8vdc +/- 20%. That is the exactly the way it should be stated. This eliminates all guesswork. This translates into a radio that manufacturer says will operate correctly within a voltage range of 11.04-16.56 vdc. Hope this helps. Michael WRHS965 KE8PLM Sent from my iPad using Tapatalk