Hi, Just bought myself a PSR-500. I use to have a BC125AT with two antenna on the top of my car. Now, My question: do i need to change those antenna's to work on P25 and EDACS?
Thanks
An antenna cares about only two factors, frequency and polarity. Frequency is the MHz it is designed to work at. Polarity is pretty much how the antenna is mounted (horizontally or vertically for the most part). They don't care how the signal is modulated on that frequency (it works the same for AM, FM, SSB, TV, Analog, Digital, Pulse, etc.)
The antenna will work the same for the P-25 or EDACS signals as long as they're on the same (or generally close to the same) frequency.
The only time this will change is if you're trying to sell the antenna. If you say it's "Digital" you can sell it for more than if you say it's for the old fashion "Analog". The only reason for the cost difference is that folks don't know any better and assume that a "Digital" antenna will be much better than an "Analog" one.