We've had the same problem with the 450M. Last I heard, Cambium is still trying to diagnose the root cause.
On Wed, Oct 10, 2018 at 3:09 PM Vlad Sedov <[email protected]> wrote: > Thanks for the info, Ken. I think there's a pressure equalization vent > on the medusa, but not 100% sure. > We're about to leave for wispapalloza, and hopefully I'll be able to > corner a Cambuim guy there and see what can be done.. lol > > > cheers > Vlad > > > On 10/10/2018 2:53 PM, Ken Hohhof wrote: > > I don't has specific experience with the 450m, but based on various other > > radios through the years, the silicone may not be a good idea. > > > > What sometimes happens is temperature changes cause pressure or vacuum > > inside the sealed enclosure, and when there's a vacuum, it will suck air > > and/or moisture in through any crack, including the cable gland. Even if > > it's just air, this can lead to condensation inside the radio. I'm > guessing > > Cambium has one or more Goretex vents on the case, designed to let air in > > and out but not water. I remember people reporting that the original 450 > > (not 450i) had problems with water intrusion, in some cases due to > > improperly installed vents. > > > > I remember years ago Trango had problems with vacuum inside the case > sucking > > water into their 5830 series APs, people were sealing with silicone, and > > that actually made the problem worse. Trango finally recommended leaving > > the cable gland a little loose so water could drip out the bottom, which > > isn't exactly a wonderful solution. > > > > Medusa is like a 450i on steroids, maybe with more air inside the vacuum > > effect when temperature drops is enhanced? > > > > If it's less than a year old, it might still be under warranty, I forget > if > > that's 90 days or 1 year, assuming you didn't purchase an extended > warranty. > > Even if it's out of warranty, but due to a manufacturing defect, you > might > > talk Cambium into replacing or repairing it for free. > > > > > > -----Original Message----- > > From: AF <[email protected]> On Behalf Of Vlad Sedov > > Sent: Wednesday, October 10, 2018 2:30 PM > > To: [email protected] > > Subject: [AFMUG] PMP-450m taking on water?? > > > > So we had to climb one of our towers today to deal with a sudden > > intermittent ethernet issues with a Medusa that's less than a year old. > > We did just have a pretty good storm and were fearing the worst.. When > the > > weather coupling on the cable got removed, a bit of water poured out, and > > the connector had obvious corrosion marks. > > A bit of cleanup and a new RJ45 later, the radio is kicking again... But > it > > seems a bit weird that a $6000+ radio can't hold back a bit of rain. > > Last time we've seen this problem was with some older PTP600 and PTP400 > > radios, after the o-ring seal failed.. Some were full of oxidation and > water > > damage. I hope it's just an isolated incident.... > > > > The climber added a bead of silicone around the perimeter of the radio to > > antenna seal it for now, but I wonder if it's worth opening a ticket with > > Cambium.. Not a happy camper right meow. > > > > > > cheers > > Vlad > > > > -- > > 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 >
-- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com
