It looks like the smallest RSD that will do 24v in and 48v out would be the RSD-200B-48? That seems like overkill to power one 20 watt radio.
On Wed, Jan 7, 2015 at 11:20 AM, Josh Luthman <[email protected]> wrote: > 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? >>>>>>> >>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>> >>> >> >
