Hader? My phone tried to autocorrect ...never knew thanks On Aug 20, 2015 8:22 AM, "Lewis Bergman" <[email protected]> wrote:
> That dark charcoal stuff is ground enhancer. Harder sells it and sometimes > you can find it on bulk in locations where the oil field is prevalent. I > think it is composed of aluminum sulfate and some form of salt. > > I use it on a regular basis as it is a pretty big bang for your buck. The > trench, Cooper and everything is already there > . just put it on top. It is easy to measure the difference it makes > especially after the first big reason once it is dumped in. > > On Wed, Aug 19, 2015, 10:30 PM Jaime Solorza <[email protected]> > wrote: > >> I saw antennas mounted on tower at Phillips 66 refinery in Borger, Texas >> with rubber sleeve between mount and tower legs. This tower was always >> getting hit by lightning until they installed that weird system I mentioned >> once on list with these clear plastic barrels with green looking rock stuff >> and some kind of charcoal looking material in the trenches where copper >> wire rested...cover with darker material and dirt....anyways I think the >> rubber sleeves were an attempt to :"float" the antenna. >> >> Jaime Solorza >> Wireless Systems Architect >> 915-861-1390 >> >> On Wed, Aug 19, 2015 at 4:05 PM, <[email protected]> wrote: >> >>> Hard to float a radio if it has an antenna mounted to a tower. >>> >>> *From:* Josh Baird <[email protected]> >>> *Sent:* Wednesday, August 19, 2015 3:56 PM >>> *To:* [email protected] >>> *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 < >>> [email protected]> 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, <[email protected]> wrote: >>>> >>>>> Set it on a cardboard box. (With a sticky note warning not to touch >>>>> case...) >>>>> >>>>> *From:* Jason McKemie <[email protected]> >>>>> *Sent:* Wednesday, August 19, 2015 3:11 PM >>>>> *To:* [email protected] >>>>> *Subject:* Re: [AFMUG] Mixing +48v and -48v >>>>> >>>>> I'll probably just float the ground. >>>>> >>>>> On Wednesday, August 19, 2015, Josh Baird <[email protected]> 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','[email protected]');> >>>>>> 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','[email protected]');> 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? >>>>>>>>> >>>>>>>> >>>>>>>> >>>>>>> >>>>>> >>>>>> >>>>> >>>> >>> >>> >> >>
