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 <losguyswirel...@gmail.com> 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, <ch...@wbmfg.com> wrote: > >> Hard to float a radio if it has an antenna mounted to a tower. >> >> *From:* Josh Baird <joshba...@gmail.com> >> *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 <j.mcke...@veloxinetbroadband.com> >>>> *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? >>>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>> >>>>> >>>> >>> >> >> > >
