I'm not saying they shouldn't. I'm saying none of them do :) On Tue, Jan 10, 2023 at 2:04 PM Chuck McCown <ch...@go-mtc.com> wrote:
> Yeahbut, you really want to shock one of your customers when they come up > to the window? > > > *From:* Josh Luthman > *Sent:* Tuesday, January 10, 2023 11:01 AM > *To:* AnimalFarm Microwave Users Group > *Cc:* Chuck McCown > *Subject:* Re: [AFMUG] backup power for small tower > > Rofl what kind of question is that? We both know there's no ground rod. > > On Tue, Jan 10, 2023 at 12:44 PM Chuck McCown via AF <af@af.afmug.com> > wrote: > >> Does the truck have a ground rod driven? I think that may be a >> requirement. Could be a weird ground loop situation. >> >> >> *From:* Jan-GAMs >> *Sent:* Tuesday, January 10, 2023 10:40 AM >> *To:* af@af.afmug.com >> *Subject:* Re: [AFMUG] backup power for small tower >> >> >> yes, voltage is reading 122v ac. The decimal point seems to wander, >> hinting there is some noise. I don't have an o-scope available. When I do >> a "site survey" I read no signals stronger than -67dbm. >> On 1/9/23 15:29, Chuck McCown via AF wrote: >> >> Maybe they are causing enough voltage drop to noise up your power >> supplies. >> Have you checked the AC voltage? >> >> *From:* Jan-GAMs >> *Sent:* Monday, January 9, 2023 3:50 PM >> *To:* af@af.afmug.com >> *Subject:* Re: [AFMUG] backup power for small tower >> >> >> We are already using shielded ethernet cable. The truck is parked about >> 40ft from the pole with two heavy guage extension cords plugged into >> outlets at the base of the pole and about a 90 degree angle from the beam >> direction of one radio and 180 degrees from the other radio, They would >> have to be purposefully jamming with higher power from inside the truck. >> Of course these are ubiquiti plastic radios, not metal housings. >> >> I'm trying to get my hands on some line-conditioners to see if that will >> make a difference. >> On 1/9/23 08:37, Forrest Christian (List Account) wrote: >> >> I'm suggesting on the AC line if that's where the noise is coming from. >> >> My guess is one of two things: >> >> 1) somehow the truck is generating rf noise. For example they have a >> mobile Hotspot or signal booster or something like that. Or some other non >> obvious source. >> >> 2) the truck is generating noise on the electrical system. Check for >> bad grounds, apply filtering, and so on. Changing the shielding >> arrangement on the cat5 cable might help. That is add/remove shield, try >> connecting/grounding the shield on both ends or just the top, or just >> the bottom. And try grounding the shield without connecting it to the >> radio. >> >> The question here is where is the noise coming from. One way to >> isolate the power as an option is to try running off a generator. Or have >> the truck run off the generator. >> >> On Mon, Jan 9, 2023, 9:06 AM Josh Luthman <j...@imaginenetworksllc.com> >> wrote: >> >>> I had a 0% success rate with ferrite. >>> >>> I have a 100% success rate with fiber (up the tower). >>> >>> On Mon, Jan 9, 2023 at 10:57 AM Forrest Christian (List Account) < >>> li...@packetflux.com> wrote: >>> >>>> Agreed. And if it's on the ethernet side, just adding some ferrite >>>> chokes to the power line might fix the problem. Or switching to shielded >>>> cable. >>>> >>>> On Mon, Jan 9, 2023, 7:52 AM Josh Luthman <j...@imaginenetworksllc.com> >>>> wrote: >>>> >>>>> Step 1 is to figure out where your packet loss is coming from. If >>>>> it's interference on the RF side, changing to a DC plant is a complete >>>>> waste of time/money. >>>>> >>>>> On Mon, Jan 9, 2023 at 9:21 AM <dmmoff...@gmail.com> wrote: >>>>> >>>>>> Usually when people say "DC plant" they mean a rectifier. A charger >>>>>> + inverter like you proposed would probably also count as having DC power >>>>>> plant. >>>>>> I used one of these once: >>>>>> https://www.aimscorp.net/12-Volt-Pure-Sine-Inverter-Chargers/ >>>>>> Worked fine, but no remote management. I'm sure there are a dozen >>>>>> options out there to pick from. >>>>>> >>>>>> An isolation transformer might be a less intrusive change. Tripp >>>>>> Lite makes some affordable ones. On the trip lite ones I had the hot and >>>>>> neutral were isolated, but the ground passed straight through. Depending >>>>>> on where the noise is coming from that might not fix it, but you can test >>>>>> an isolated ground by snapping off the ground prong on the transformer or >>>>>> using a 2-prong adapter. I say "test" because you shouldn't run without >>>>>> a >>>>>> ground permanently. >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> -----Original Message----- >>>>>> From: AF <af-boun...@af.afmug.com> On Behalf Of Jan-GAMs >>>>>> Sent: Sunday, January 08, 2023 3:41 PM >>>>>> To: af@af.afmug.com >>>>>> Subject: Re: [AFMUG] backup power for small tower >>>>>> >>>>>> It's in a parking-lot of a business and they started plugging their >>>>>> food truck into the power-source. So what do you mean by "DC plant"? >>>>>> >>>>>> On 1/8/23 12:20, Bill Prince wrote: >>>>>> > If your site is 100% DC-powered, the batteries should provide all >>>>>> the >>>>>> > isolation you need. My suggestion is to just switch to DC plant. >>>>>> > >>>>>> > >>>>>> > bp >>>>>> > <part15sbs{at}gmail{dot}com> >>>>>> > >>>>>> > On 1/8/2023 11:21 AM, Jan-GAMs wrote: >>>>>> >> Ever since a food truck started plugging their truck into the same >>>>>> >> power source we use we've been experiencing severe packet loss >>>>>> >> through it. Possibly electrical motor-hum? Anyway, I'm wondering >>>>>> >> what is available or suggested to use to place a better electrical >>>>>> >> isolation for a battery backup in the box on the tower. >>>>>> >> >>>>>> >> We're using two ubiquiti radios one cheap ubiquiti router and a >>>>>> Cisco >>>>>> >> fiber to ether-net router. We have a cyberpower 450va that >>>>>> provides >>>>>> >> power for less than an hour when we have a power outage. It would >>>>>> be >>>>>> >> better if we could use something more hefty. The NEMA box is 2ft >>>>>> x >>>>>> >> 2ft x 8in. Inside is 2ft x 2ft x 6in. So there isn't much room. >>>>>> >> >>>>>> >> I'm thinking maybe a stack of batteries, a charger and a sine-wave >>>>>> >> invertor? Unless someone knows of a product that would do what's >>>>>> >> needed? >>>>>> >> >>>>>> >> >>>>>> > >>>>>> >>>>>> -- >>>>>> AF mailing list >>>>>> AF@af.afmug.com >>>>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>>>> >>>>>> >>>>>> -- >>>>>> AF mailing list >>>>>> AF@af.afmug.com >>>>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>>>> >>>>> -- >>>>> AF mailing list >>>>> AF@af.afmug.com >>>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>>> >>>> -- >>>> AF mailing list >>>> AF@af.afmug.com >>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>> >>> -- >>> AF mailing list >>> AF@af.afmug.com >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >> >> ------------------------------ >> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> >> ------------------------------ >> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> >
-- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
