It looks like there'd be about 6db of loss on 20' of LMR195 vs. 2.2db on LMR400... that's actually not as bad as I thought. Personally, I'd go with at least LMR240 for that long of a run.
On Tue, Apr 7, 2015 at 1:06 PM, Josh Luthman <[email protected]> wrote: > For the AN50s I always did LMR400 because that's what was there. It was > never more than 3 meters (9 feet). > > For every other radio it's generally what's included. The biggest I can > think of is the brand we can't say here - might be heavy duty LMR195, > though. > > > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > On Tue, Apr 7, 2015 at 2:01 PM, Glen Waldrop <[email protected]> > wrote: > >> I might do that. >> >> Is that what you use for less than 20ft? >> >> LMR400 has less loss, but I think at that length all the loss is going to >> be the connectors anyway. >> >> 400 is a bit stiff. >> >> >> >> ----- Original Message ----- >> *From:* Josh Luthman <[email protected]> >> *To:* [email protected] >> *Sent:* Tuesday, April 07, 2015 12:58 PM >> *Subject:* Re: [AFMUG] Quick antenna question >> >> For <20 feet you could just use 195, I don't think you get any much >> difference at 5 GHz. >> >> >> Josh Luthman >> Office: 937-552-2340 >> Direct: 937-552-2343 >> 1100 Wayne St >> Suite 1337 >> Troy, OH 45373 >> >> On Tue, Apr 7, 2015 at 1:56 PM, Glen Waldrop <[email protected]> >> wrote: >> >>> We seal ours as well. >>> >>> I recrimped most of the premade cables I purchased after I got a batch >>> where the ends just came off. Assemble the equipment on the ground for >>> testing, go to line the antenna up for a test shot, notice no signal, the >>> coax is laying on the ground. >>> >>> I didn't take the end off, just hit it again with the crimpers from each >>> direction. >>> >>> That has made me a bit gun shy about LMR400, especially after it >>> happened on a tower. >>> >>> >>> >>> ----- Original Message ----- >>> *From:* Josh Luthman <[email protected]> >>> *To:* [email protected] >>> *Sent:* Tuesday, April 07, 2015 12:49 PM >>> *Subject:* Re: [AFMUG] Quick antenna question >>> >>> Nearly all of my coax is preterminated. It's all a) Streakwave or b) >>> included with the antenna. I can't recall if we've ever had a problem with >>> any of it, but we always use coax seal. >>> >>> >>> Josh Luthman >>> Office: 937-552-2340 >>> Direct: 937-552-2343 >>> 1100 Wayne St >>> Suite 1337 >>> Troy, OH 45373 >>> >>> On Tue, Apr 7, 2015 at 1:34 PM, Glen Waldrop <[email protected]> >>> wrote: >>> >>>> 15dBi omni and ~15 to 20ft LMR400. >>>> >>>> Lightning blew the door off the power box on the ground, fried the mini >>>> PCI cards, but the RB600 still worked, just no data across the ethernet >>>> port. >>>> >>>> The unit was hit in 09, was replaced and the antenna and coax have been >>>> in service the whole time. I never replaced it as I thought the hinky rx >>>> signal was just misreported, a 24Mbps link @ -88 shouldn't happen. Rx >>>> signal quality has finally gone down to match the actual numbers now, so I >>>> think something in the antenna was damaged. >>>> >>>> The problem I have here is quality cables. I've gone through around 50 >>>> that were replaced by Streakwave. They had a bad batch. Made me quite shy >>>> to replace what appears to be a good cable with one that might just quit >>>> like some others have. >>>> >>>> I made this one in late 08. >>>> >>>> >>>> >>>> ----- Original Message ----- >>>> *From:* Jaime Solorza <[email protected]> >>>> *To:* Animal Farm <[email protected]> >>>> *Sent:* Tuesday, April 07, 2015 12:12 PM >>>> *Subject:* Re: [AFMUG] Quick antenna question >>>> >>>> more info ...what kind of antenna? how much RF cable and what kind is >>>> it? what do connectors look like ? >>>> >>>> Jaime Solorza >>>> Wireless Systems Architect >>>> 915-861-1390 >>>> >>>> On Tue, Apr 7, 2015 at 11:09 AM, Glen Waldrop <[email protected]> >>>> wrote: >>>> >>>>> I had a tower hit by lightning. The antenna appeared to survive, so >>>>> I replaced electronics and let it go. >>>>> >>>>> The system reports low rx signal, 20dB worse than expected, but got >>>>> the speeds I expected, so originally I thought the signal was just being >>>>> misreported by the new equipment. It has degraded now, so we're working on >>>>> it this afternoon. >>>>> >>>>> I'm replacing the antenna, but what are the odds that the coax is >>>>> damaged as well? >>>>> >>>>> I've got spare, probably going to send it up with the climber anyway. >>>>> >>>> >>>> >>> >> >
