Maxtrac/radius power connection question

[gamewarden3006]

I have an older maxtrac radius UHF radio. It was already hooked up in a car when I got it. I recently had this radio removed and put into a new car and they hooked it up slightly differently.

the radio has the standard male/female power cable and it also has a hot wire plugged in to the port with the external speaker wires. On my old vehicle, the main power cord was connected to an always hot 12V and the 12v wire with the speaker (assuming this is a switch wire) was plugged into a fuse box that shut off with the vehicle.
Now on my new vehicle both 12v wires are plugged into the fuse panel that loses power when the vehicle shuts off (fuse panel is controlled by a charge guard.)

which of these ways is preferable to connect this radio?

Thanks

 

[12dbsinad]

The radio is set up for "ignition sense". Both ways will work, however keeping the main leads hot all the time will retain memory in the radio. If you notice, when you shut the vehicle off and wait awhile the radio will default to channel 1 no matter where it was set when it got shut off. This may ot may not be a inconvience for you. The perfered method is connecting right to the battery. It provides the best power possible and is also acts as a filter to eliminate any ignition noise etc... Also, if this is a new vehicle under warrenty sometimes dealers will not cover a issue if there is a high power devise tapped off the fuseblock should something arise. I only switch low current on my radio for that reason and the other things stated. Hope this helps. Happy 4th too!

 

[gamewarden3006]

That is kinda what I thought. after sitting for a day or so, it will default to channel 6 ( last channel in the list) and it also switches out of scan mode, which it stays in.

never even thought about the interference issue but that is a very valid point.

I will hook it up straight to the battery tomm.

Thanks for the help!!