That's a good reason to use 48v IMO
Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Wed, Jan 7, 2015 at 12:12 PM, Mathew Howard <[email protected]> wrote: > The Mimosa specs actually say 20 watts max - I have no idea what they > actually use. > The reason I'm looking at doing 48v and down-converting is that I only > have low voltage cable buried to the tower, so I'd be putting the > down-converter at the base of the tower and running that at 48v to cut down > on voltage drop. > > On Wed, Jan 7, 2015 at 11:06 AM, Josh Luthman <[email protected] > > wrote: > >> Well assuming the Mimosa is like 50 watts, how much efficiency is really >> going to happen here? Say it's crazy at 10% you're saving 5 watts. The >> downside is your regulator needs to carry the wattage of say 8 APs, a >> router, etc at 100 watts. >> >> >> Josh Luthman >> Office: 937-552-2340 >> Direct: 937-552-2343 >> 1100 Wayne St >> Suite 1337 >> Troy, OH 45373 >> >> On Wed, Jan 7, 2015 at 12:04 PM, Mathew Howard <[email protected]> >> wrote: >> >>> I'm considering upconverting instead... it would actually be a lot >>> easier, but I think it's probably going to make more sense in this >>> particular case to go with a 48v power supply. that said, what would be a >>> good option for a 24v to 48v upconverter? >>> >>> On Wed, Jan 7, 2015 at 10:51 AM, Mike Hammett <[email protected]> wrote: >>> >>>> but backhauls use more power than APs, traditionally. >>>> >>>> Cambium tower radios support 48v. >>>> >>>> >>>> >>>> ----- >>>> Mike Hammett >>>> Intelligent Computing Solutions >>>> http://www.ics-il.com >>>> >>>> ------------------------------ >>>> *From: *"Josh Luthman" <[email protected]> >>>> *To: *[email protected] >>>> *Sent: *Wednesday, January 7, 2015 10:47:24 AM >>>> *Subject: *Re: [AFMUG] Mimosa DC PoE injector >>>> >>>> >>>> Cambium's latest is 24v >>>> Ubnt is 24v >>>> Mikrotik is 24v >>>> >>>> Big backhauls are 48v, but you typically have more APs than backhauls. >>>> >>>> >>>> Josh Luthman >>>> Office: 937-552-2340 >>>> Direct: 937-552-2343 >>>> 1100 Wayne St >>>> Suite 1337 >>>> Troy, OH 45373 >>>> >>>> On Wed, Jan 7, 2015 at 11:44 AM, Bill Prince <[email protected]> >>>> wrote: >>>> >>>>> I'd go with the native 48V for the Mimosa, and a down-converter for >>>>> whatever needs 24V. More and more products are coming out with 48V, and >>>>> it's easier, and lower current to go down voltage than up voltage. >>>>> >>>>> bp >>>>> <part15sbs{at}gmail{dot}com> >>>>> >>>>> >>>>> On 1/7/2015 8:41 AM, Josh Luthman wrote: >>>>> >>>>> For one device on 48v I'd do 24v natively and go up. Otherwise you >>>>> have 1 part that you need to scale with for the rest of the tower. >>>>> >>>>> >>>>> Josh Luthman >>>>> Office: 937-552-2340 >>>>> Direct: 937-552-2343 >>>>> 1100 Wayne St >>>>> Suite 1337 >>>>> Troy, OH 45373 >>>>> >>>>> On Wed, Jan 7, 2015 at 11:39 AM, Chuck McCown <[email protected]> wrote: >>>>> >>>>>> It would do it. >>>>>> Best? Yes in my opinion. >>>>>> But that is only an opinion. May not truly be the best option for >>>>>> you. >>>>>> >>>>>> *From:* Mathew Howard <[email protected]> >>>>>> *Sent:* Wednesday, January 07, 2015 9:24 AM >>>>>> *To:* af <[email protected]> >>>>>> *Subject:* [AFMUG] Mimosa DC PoE injector >>>>>> >>>>>> I need to power a Mimosa B5 at a site where I only have DC at the >>>>>> tower, would a WBMFG GigE-POE be the best thing to use to power one of >>>>>> these? >>>>>> >>>>>> Also, since I'm going to need to be converting to 48v, I'm thinking >>>>>> of using a Meanwell AD-155C and an RSD-100C to downconvert to 24v for >>>>>> everything else - is there anything I should be looking at doing >>>>>> differently? >>>>>> >>>>> >>>>> >>>>> >>>> >>>> >>> >> >
