[ntp:questions] Sure gps looses all sattelite fixes

unruh unruh at invalid.ca
Tue Feb 28 06:17:59 UTC 2012


On 2012-02-28, Chris Albertson <albertson.chris at gmail.com> wrote:
>  Is the coax connection water proof?   Water can wick down a coax
> line.      What kind of connections are they?  BNC is not water proof.

There is a bnc at the receiver end of the antenna wire. That is inside
the building. The antenna and the junctionless line are outside. The
antenna is supposed to be waterproof, but I put it into a plastic bag
just to keep the rain off it. 

>  I think you said a plastic bag was used.   Then you'd have humidity
> sealed in.    When in the sun the water turns to vapor and can get
> inside then it cools and the vapor condenses to water.  Happens one
> cycle per day.  It is better to use an inverted jar that is open at
> the bottom than a sealed bag.   The best setup is to buy a real timing
> antenna.   These are 100% sealed and the connection between cable and
> antenna is inside a 3/4" iron pipe.     Such antenna are not
> expensive, on eBay, under $30.



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