Simple. If your area uses Phase II, you’ll need a radio capable of decoding it. If yours doesn’t, you won’t, but you’ll have it, anyway, in case it ever does.

The practical effect is that if they are using P25 Phase II you will hear them on the HP-2 (assuming unencrypted) and you won't hear them on the HP-1. Joe M.

What is the practical effect of the added P25 capability for various locations?

Yes. You get Phase II digital. And supposedly the audio quality is better.

A thinner wallet....just kidding...I would also be interested in hearing the differences.

You would gain P25 Phase II decode ability. Joe M.

I currently have an HP1 that works fairly well except for a couple of things. What I want to know is, would I be gaining anything by replacing my HP1 with a new HP2? 73, Dean

Likely the difference is antennas. The HP-2 has a newer vocoder, so it makes sense it might be better. But details of where you are located (system types) would result in a better answer. Joe M.

Does the HP2 have better audio quality compared to the HP1. I noticed on the HP1 that some transmissions are digital sounding and garbled whereas my 536 is crystal clear. I am considering buying and H

Because you said "I am using the HP1 in the house plugging the scanner and a few other things in a rig runner with power poles", and since you can only use one voltage input on the RigRunner, and the

I am not quite sure how you thought the Rig Runner had 9V things plugged into it. In any event, nothing is damaged. I am now using the Uniden 12v cigarette lighter adapter plugged into a 12v power sup

Yes glitches happen. Pull the batteries, and if possible reload the SD card...best success Lloyd KO4L

Pull out the batteries. It will work without them but the recording function will be disabled. If it helps it could be a bad SD card that needs to be replaced. /Ubbe

What is the condition of the batteries? Joe M.

And all the devices on the RigRunner are 9V devices? Or are you feeding the HP-1 12V? (and likely damaged something in doing so) Joe M.

Thanks for the reply back. I am using the HP1 in the house plugging the scanner and a few other things in a rig runner with power poles. The rig runner is connected to a samlex power supply. I have th

Good Dean, Your mention of a ground loop should be easy to correct if in fact it’s a ground loop that’s causing the problem. Use a common (same) ground.