[time-nuts] GPS antenna failure

Magnus Danielson cfmd at bredband.net
Mon Feb 6 17:27:13 EST 2006

From: Jeffrey Pawlan <jpawlan at pawlan.com>
Subject: Re: [time-nuts] GPS antenna failure
Date: Mon, 6 Feb 2006 14:08:54 -0800 (PST)
Message-ID: <Pine.GSO.4.31.0602061403500.10028-100000 at jeffrey150.pawlan.com>

> You have re-discovered the meaning of the word debug.

Well yes. ;O)

> On Mon, 6 Feb 2006, Magnus Danielson wrote:
> >  That besides finding a spider in the lower-cap, it had eaten half
> > the o-ring on the outside and near the contact we also found its pray wound in.
> You did not mention the brand or model of the antenna you were using.

I left it back at the office. It came with the GPS and was not a particular
choice of mine. It is not a Trimble thought.

> I was using a Trimble outdoor antenna for a year. Then it went dead after
> heavy rain.
> I found water inside. I opened it and found that the epozy had failed to bond
> the top shell to the bottom thoroughly, thus allowing water to enter when the
> air pressure changed due to temperture extemes.  I showed it to an engineer at
> Trimble who completely dismissed the possibility that it was a problem with the
> epoxy application. He insisted that I must have had water seep in through the
> type N connector (which is completely on the bottom of the antenna and was
> covered with heatshrink tubing)

I must admitt that waterproof methods is not one of my expertise areas. All of
a sudden I feel that I should learn more about it. :P


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