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XPR8300/8400 DC mode

Moderator: Queue Moderator

User avatar
marcosorourke
Posts: 75
Joined: Thu Nov 13, 2008 7:07 pm
What radios do you own?: XPR7550

XPR8300/8400 DC mode

Postby marcosorourke » Wed Feb 14, 2018 9:19 pm

I'm looking to set up a temporary repeater off grid running on a battery. I'm looking at deep cycle marine batteries, but I see that they're 12 V and the spec sheet says that the repeater requires 13.5 V. The repeater only needs to run at the lowest power possible (I believe 20 watts is the lowest it'll go). I'll be running two channel slots with digital.

Will this work? What is your recommendation?

This will be to cover a Boy Scout camp for a week-long training course. I figure that I may have to swap out the battery every day with a second one that will be charged at the camp office.

Thank you for your help.

User avatar
jackhackett
Posts: 1437
Joined: Tue Jun 10, 2003 8:52 am

Re: XPR8300/8400 DC mode

Postby jackhackett » Sat Feb 17, 2018 10:16 am

They're designed to use a 12V battery.

User avatar
marcosorourke
Posts: 75
Joined: Thu Nov 13, 2008 7:07 pm
What radios do you own?: XPR7550

Re: XPR8300/8400 DC mode

Postby marcosorourke » Sat Feb 17, 2018 12:08 pm

Ok thanks!

What kind of runtime am I looking at while on battery? Probably about 25-35% use on digital.

User avatar
jackhackett
Posts: 1437
Joined: Tue Jun 10, 2003 8:52 am

Re: XPR8300/8400 DC mode

Postby jackhackett » Sat Feb 17, 2018 2:43 pm

Couldn't tell you, depends on the battery. Not something I'm all that familiar with, perhaps someone else here has some experience with them.
If you can, it wouldn't be a bad idea to set it up and try it ahead of time.

User avatar
escomm
Queue Moderator
Posts: 5154
Joined: Fri Mar 24, 2006 8:24 pm

Re: XPR8300/8400 DC mode

Postby escomm » Thu Mar 01, 2018 7:54 am

marcosorourke wrote:Ok thanks!

What kind of runtime am I looking at while on battery? Probably about 25-35% use on digital.

Get out your spec sheet and note the current draw on TX and standby, then get out your calculator and do some math


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