Just think how small of wire you could use with 5K...
Okay, yeah, there would be some other problems that would kind of make
that not worth it. 48V seems to be a pretty good compromise, there
aren't really any different safety concerns between 24v and 48v, so I
don't really see a good argument for anything less than 48v, other than
that it's what we've been using for years... which isn't really that
good of an argument, when you think about it.
On Thu, Jun 21, 2018 at 3:02 PM, <ch...@wbmfg.com
<mailto:ch...@wbmfg.com>> wrote:
Well my solar string inverters are 1K DC.
Yep, if efficiency is the concern 5K would be good if you are
hauling the energy any distance at all.
Long distance transmission lines go up to 1 MV.
But safety comes into play at some point. 48 volts is still
considered low voltage, less rules and regs and almost zero shock
hazard. I cannot feel 48. Some can.
-----Original Message----- From: Robert Andrews
Sent: Thursday, June 21, 2018 1:59 PM
To: af@af.afmug.com <mailto:af@af.afmug.com>
Subject: Re: [AFMUG] ePMP voltages again - specifically 2ghz
Ok, 5K volt then..
On 06/21/2018 11:20 AM, ch...@wbmfg.com <mailto:ch...@wbmfg.com> wrote:
Higher is always better.
Wires are smaller.
Everything is more efficient.
Everything runs cooler.
Less voltage drop.
Less power loss in conductors.
Sometimes simplifies the design of the load device.
*From:* Josh Luthman
*Sent:* Thursday, June 21, 2018 12:17 PM
*To:* Chuck McCown
*Cc:* Mathew Howard ; AFMUG
*Subject:* Re: [AFMUG] ePMP voltages again - specifically 2ghz
In a perfect world it would all be 100% 48v (or hell even 100%
24v) but the only rule of standards is that there are no standards.
See XKCD 927 - https://xkcd.com/927/
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
On Thu, Jun 21, 2018 at 2:10 PM, <ch...@wbmfg.com
<mailto:ch...@wbmfg.com>> wrote:
Nice to see the smaller players learning how to put on
their big boy
pants and join the ranks of carrier grade vendors.
*From:* Mathew Howard
*Sent:* Thursday, June 21, 2018 12:08 PM
*To:* Josh Luthman
*Cc:* Chuck McCown ; AFMUG
*Subject:* Re: [AFMUG] ePMP voltages again - specifically 2ghz
Well, MikroTik does have 48v now (the hEX PoE/PowerBox Pro
will take
up to 57 volts), but it's only one or the other, it doesn't
do any
voltage conversion. But what I've been doing at some sites is
something like using one PowerBox Pro to feed all the 24v
only gear,
and a second one to feed the 48v gear.
On Thu, Jun 21, 2018 at 1:02 PM, Josh Luthman
<j...@imaginenetworksllc.com
<mailto:j...@imaginenetworksllc.com>> wrote:
Agreed.
EdgePoint does 48v only but has the outdoor part.
Netonix does 24v and 48v but doesn't have any outdoor
capability
(enclosures would have to be ridiculous for the 12 port+)
Mikrotik only has 4 ports and 24v only.
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g>>
Suite 1337
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g>>
Troy, OH 45373
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g>>
On Thu, Jun 21, 2018 at 2:01 PM, Mathew Howard
<mhoward...@gmail.com <mailto:mhoward...@gmail.com>> wrote:
Yeah, that's the easiest compromise at this point.
What I'd like, is a box that I can connect a power
supply to
(whether that's 48v, or 24v, I don't care) that
gives my a
48v and a 24v output, and has another connection for
batteries and it deals with feeding the batteries the
correct voltages and current. Whether that's 12v,
24v or 48v
batteries, I don't really care... although I'd
prefer 12v or
24v so can use a smaller number of bigger
batteries, if I
want to.
Ideally, Forrest would build this, so I could just
plug it
into the SiteMonitors that are already there, and
be able to
monitor and control it as well.
Of course I can buy all the parts separately to do
the same
thing, but having a pre-built box to do the job
would be a
lot cleaner.
On Thu, Jun 21, 2018 at 12:52 PM, Josh Luthman
<j...@imaginenetworksllc.com
<mailto:j...@imaginenetworksllc.com>> wrote:
It was 48v
Then it was mostly 24v
Now it's going 48v
Just give it a little bit, it'll go back to 24v.
I'd rather get a power supply doing 26v to fix my
problem in 2 minutes than start changing things
to 48v
which would blow so much stuff up (epmp non
gps, ubnt M
gear, half the Mikrotiks)
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g>>
Suite 1337
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g>>
Troy, OH 45373
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g>>
On Thu, Jun 21, 2018 at 1:05 PM, Mathew Howard
<mhoward...@gmail.com
<mailto:mhoward...@gmail.com>> wrote:
No, there's not really a good reason, it
just means
you have an extra part to deal with.
We still use UBNT for our 2.4ghz stuff, but
those
are the only radios that won't run off 48v
on most
of our new sites, so I've done some that
are 48v
only and just use those things on the
radios that
need them. But if you have more than 1 or 2
things
that need 24v, it's generally more
practical to just
use a bigger voltage converter and run multiple
radios off it.
On Thu, Jun 21, 2018 at 11:57 AM,
<ch...@wbmfg.com <mailto:ch...@wbmfg.com>>
wrote:
Yep, that was what I was thinking.
So, looks to me like there is no reason
not to
do 48 volts.
*From:* Mathew Howard
*Sent:* Thursday, June 21, 2018 10:56 AM
*To:* Chuck McCown
*Cc:* Dave ; AFMUG
*Subject:* Re: [AFMUG] ePMP voltages
again -
specifically 2ghz
You mean like this?
https://www.ubnt.com/accessories/instant-8023af-adapters/
<https://www.ubnt.com/accessories/instant-8023af-adapters/>
<https://www.ubnt.com/accessories/instant-8023af-adapters/
<https://www.ubnt.com/accessories/instant-8023af-adapters/>>
Or do you have something better in mind?
On Thu, Jun 21, 2018 at 11:53 AM,
<ch...@wbmfg.com
<mailto:ch...@wbmfg.com>> wrote:
Me too...
So, what appetite is there for an
inline POE
regulator that would convert 48 to 24?
*From:* Mathew Howard
*Sent:* Thursday, June 21, 2018
10:50 AM
*To:* Dave
*Cc:* AFMUG
*Subject:* Re: [AFMUG] ePMP
voltages again -
specifically 2ghz
ugh... I keep forgetting to use
reply-to-all...
Not every single UBNT radio... all the
airfibers will happily take 48v.
Mikrotik is
finally starting to make most of
the new
stuff handle 48v (including the
PowerBox
Pro), but yeah. UBNT is the reason
I still
have to use 24v on most of our
towers...
they make a converter you can stick
on in
line with the radios, but that's
kind of a
pain if you have more than one or
two, and
it's an extra part to fail.
On Thu, Jun 21, 2018 at 11:46 AM, Dave
<dmilho...@wletc.com
<mailto:dmilho...@wletc.com>> wrote:
They make dental floss for that :)
On 06/21/2018 11:39 AM, Josh
Luthman wrote:
Except for every single
Ubnt device
and a majority of Mikrotiks....
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+%0D%0A++++45373&entry=gmail&source=g
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+%0D%0A++++45373&entry=gmail&source=g>>
Suite 1337
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+%0D%0A++++45373&entry=gmail&source=g
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+%0D%0A++++45373&entry=gmail&source=g>>
Troy, OH 45373
<https://maps.google.com/?q=1100+%0D%0A++++++Wayne+St+Suite+%0D%0A++++++1337+Troy,+OH+45373&entry=gmail&source=g
<https://maps.google.com/?q=1100+%0D%0A++++++Wayne+St+Suite+%0D%0A++++++1337+Troy,+OH+45373&entry=gmail&source=g>>
On Thu, Jun 21, 2018 at
12:39 PM, Josh
Baird <joshba...@gmail.com
<mailto:joshba...@gmail.com>> wrote:
I promise life will be
easier if
you just use 48V. :)
On Thu, Jun 21, 2018 at
12:35 PM,
Josh Luthman
<j...@imaginenetworksllc.com
<mailto:j...@imaginenetworksllc.com>> wrote:
I'm trying to use a
Powerbox
Pro to power up two
epmp APs. The 5 GHz is just fine but the
2 GHz is saying
current too
low. Both ports
are getting
23 volts and the
cables are
<10 feet (from the
Powerbox Pro).
Does anyone know if
the 2ghz
requires more
voltage possibly?
Spec sheet does say
23 volts
min but it's weird
one powers
(5 ghz) and the
other doesn't.
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g>>
Suite 1337
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g>>
Troy, OH 45373
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g
<https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g>>
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