I will never forget the time that some guys on the top of a high rise in Chicago called me in a panic swearing my 3’ parabolic antenna was shorting out their radio. Every time they mounted the radio it would kill the power supply... I talked myself blue in the face that day. They really thought I was an idiot and had made a defective antenna. Probably 4 calls, each one increasingly unpleasant. I asked them to just tough the radio itself to the tower. Not my antenna and see what happens.
Nobody ever called back. From: TJ Trout Sent: Friday, October 1, 2021 12:11 PM To: AnimalFarm Microwave Users Group Cc: Chuck McCown Subject: Re: [AFMUG] Question for Chuck on POE inserters You can always mount it to plastic =) but a isolated dc-dc converter is the best option On Fri, Oct 1, 2021 at 11:09 AM Chuck McCown via AF <[email protected]> wrote: My inserters are not referenced to chassis ground at all with the POE. So they would not be causing a problem. But if the tower mounted gear is +48 and if it ties one side to ground, you will short out your –48 supply assuming it grounds the + rtn lead. From: Gino A. Villarini Sent: Friday, October 1, 2021 11:31 AM To: AnimalFarm Microwave Users Group Subject: [AFMUG] Question for Chuck on POE inserters Hey Chuck! Long time! We are trying to figure out some stuff here with our DC plant. We are -48v on the rectifiers, but as you know some WISP gear is +48 and other is floating. What happens if I power radios using your POE inserters direct to the -48, would I cause ground loops with tower mounted gear that is +48v? does the SS circuit in the POE inserters grounds the (-) ? Gino Villarini Founder / President @GVillarini 787.273.4143 | Metro Office Park #18 Suite 304 Guaynabo, PR 00968 ------------------------------------------------------------------------------ -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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