Hard to float a radio if it has an antenna mounted to a tower.
From: Josh Baird
Sent: Wednesday, August 19, 2015 3:56 PM
To: af@afmug.com
Subject: Re: [AFMUG] Mixing +48v and -48v
I'm about to do the exact opposite - convert +48V to -48V to power a radio. I
have an RSD in between. Should I take extra care to ensure that the RSD does
not touch the metal enclosure in any way? I was also planning on floating the
radio's ground (and the RSD).
On Wed, Aug 19, 2015 at 5:32 PM, Jason McKemie
<j.mcke...@veloxinetbroadband.com> wrote:
Good point, the damn thing is mounted to the same rack as the -48v unit right
now. I believe the -48v unit is isolated from the rack, but I had better make
sure before I switch the Mikrotik over to DC power.
-Jason
On Wed, Aug 19, 2015 at 4:22 PM, <ch...@wbmfg.com> wrote:
Set it on a cardboard box. (With a sticky note warning not to touch
case...)
From: Jason McKemie
Sent: Wednesday, August 19, 2015 3:11 PM
To: af@afmug.com
Subject: Re: [AFMUG] Mixing +48v and -48v
I'll probably just float the ground.
On Wednesday, August 19, 2015, Josh Baird <joshba...@gmail.com> wrote:
They are hard to find. Where will you ground the MT in this type of
scenario (with an RSD in between your -48V rectifier and MT)?
Josh
On Tue, Aug 18, 2015 at 11:31 PM, Jason McKemie
<javascript:_e(%7B%7D,'cvml','j.mcke...@veloxinetbroadband.com');> wrote:
It actually looks like the RSD-100C-24 should do the trick (I'm
dropping to 24v, so I guess my subject line wasn't exactly correct). My normal
source is out of those, according to their website they have some RSD-200C-48
units though.
On Tue, Aug 18, 2015 at 7:58 PM, George Skorup
<javascript:_e(%7B%7D,'cvml','geo...@cbcast.com');> wrote:
The Mean Well RSD gives 4kV i/o isolation and will work perfectly
this, no grounding issues. I think the smallest you can get in 48/48 is 200W,
the RSD-200C-48. Good luck finding some.
On 8/18/2015 7:20 PM, Jason McKemie wrote:
I'm wanting to power a mikrotik switch off of a -48v rectifier
setup that already has some -48v equipment running on it. I'll be using a
Meanwell DC/DC converter, which appears to not bond anything with the ground.
The mikrotik, however, does bond the negative with ground. Do I need to keep
the mikrotik's ground isolated from the main ground? Or is the DC/DC converter
going to keep things from going boom?
