apc smart ups will clean up motor noise, just have to set it to low on the tolerance or its always going to be trimming and tear it up
On Tue, Jan 10, 2023 at 2:22 PM Josh Luthman <j...@imaginenetworksllc.com> wrote: > 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 >
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