Franklin system... Jaime Solorza On Oct 25, 2015 8:46 PM, "Stefan Englhardt" <[email protected]> wrote:
> I see the big telcos build a kind of shield above/around their > installations. Big poles connected with thick grounding cables on the edges. > > > -------- Ursprüngliche Nachricht -------- > Von: Ken Hohhof <[email protected]> > Datum: 25.10.2015 23:37 (GMT+01:00) > An: [email protected] > Betreff: Re: [AFMUG] Site Grounding - what we are doing wrong? > > Well, not necessarily. It is possible to turn grounding and shielding > into a religion and lose track of what they are accomplishing. > > For example, the power company guy in up in the bucket doesn’t rely on > grounding to protect him from high voltage, and neither do the birds > sitting on the wires. I’m not saying TJ is right, but be careful of adding > more grounding without thinking about what you are grounding, to what, and > why. > > I also wonder if Gino is seeing this everywhere, or just at a few towers. > I think some towers have problems and you can’t fix it without going beyond > just your equipment. > > If it’s everywhere, did this coincide with a change to a different > brand/model of radios? > > *From:* Mike Hammett <[email protected]> > *Sent:* Sunday, October 25, 2015 5:06 PM > *To:* [email protected] > *Subject:* Re: [AFMUG] Site Grounding - what we are doing wrong? > > If what you've done isn't working, then it isn't enough, not that it's too > much. > > > > ----- > Mike Hammett > Intelligent Computing Solutions > http://www.ics-il.com > > ------------------------------ > *From: *"TJ Trout" <[email protected]> > *To: *[email protected] > *Sent: *Sunday, October 25, 2015 5:04:32 PM > *Subject: *Re: [AFMUG] Site Grounding - what we are doing wrong? > > Gino, > > Try not grounding at all? > > > > On Sun, Oct 25, 2015 at 1:39 PM, George Skorup <[email protected]> wrote: > >> I have no doubt it's the SS clamping that's blowing the fuse. If there >> was no fuse, I bet the SS would continue clamping and start smoking if >> there's enough current to supply it. I don't know if it helps save things, >> but I'm leaning towards yes. Just getting all of the radios on the same DC >> bus seems to have helped quite a bit as well. >> >> On 10/25/2015 12:51 PM, Ken Hohhof wrote: >> >>> Speaking of fuses, I know sometimes we get overcurrent trips on CTMs and >>> SyncInjectors and have to reset them. Very rare, but always during storms. >>> It is possible this is saving radios, I can't say for sure. >>> >>> >>> -----Original Message----- From: George Skorup >>> Sent: Sunday, October 25, 2015 12:34 PM >>> To: [email protected] >>> Subject: Re: [AFMUG] Site Grounding - what we are doing wrong? >>> >>> One thing we've been doing for several years now is a bonding wire up >>> the tower. I do not trust the tower steel/leg joints being low enough >>> resistance. Failure rate went way down. DC and fuses doesn't hurt either. >>> >>> On 10/25/2015 10:57 AM, Gino Villarini wrote: >>> >>>> So we are loosing radios left and right due to lightning! >>>> >>>> Typical site setup: >>>> >>>> Radios on tower grounded to tower >>>> >>>> Shielded cable >>>> >>>> Shielded patch panel - grounded >>>> >>>> Regular cat5 jumpers >>>> >>>> Wbmfg SS - grounded >>>> >>>> Regular cat5 jumpers >>>> >>>> Poe device >>>> >>>> What's wrong? >>>> >>>> >>>> >>> >>> >> > >
