[time-nuts] basic question on GPS satellites

[paul swed]

ok
Indeed now that its morning and different glasses I would have seen that.
There you go dangerous at 11pm

On Sun, May 15, 2011 at 11:39 PM, WB6BNQ <wb6bnq at cox.net> wrote:

> Paul,
>
> If you had read more carefully what I wrote you would see that I said
> better coax
> "WHEN HE PUTS IT OUTSIDE."
>
> thank you,
>
> Bill....WB6BNQ
>
>
> paul swed wrote:
>
> > 12' of rg 58 should be fine and 5-3.7V should work
> > In the thread it says this is using a window. Boy some windows actually
> can
> > block the signal especially if there is a screen.
> > Some one else said you need a view to the south. Thats a fact from ma. at
> > least interesting to watch the sat tracks. I would not have believed they
> > travel the way they do.
> > Strongly believe you need to see clear sky. Signal to noise ratio.
> > Lastly its late forgive typos.
> >
> > On Sun, May 15, 2011 at 11:01 PM, WB6BNQ <wb6bnq at cox.net> wrote:
> >
> > > Hi Eugene,
> > >
> > > I will presume from your call sign that you are North of the equator.
>  Thus
> > > you
> > > would want to have the best visibility (i.e., clear) pointing to the
> South.
> > >  The
> > > fact that you are at the window, on the inside, does limit the amount
> of
> > > sky you
> > > can see.  Just getting it on the roof will make a reasonable
> difference.
> > >  Getting
> > > above, or reasonably at the same height as, the trees should be the
> goal.
> > >
> > > I would use something better then RG-58 when you put it outside.  Even
> RG-6
> > > with
> > > quality connectors, the good type used by the cable TV companies, is
> better
> > > than
> > > RG-58 at the GPS frequency.
> > >
> > > As for increasing the voltage to the antenna, I would definitely be
> careful
> > > there.  No doubt a regulator of some sort is used up at the antenna and
> > > raising
> > > the voltage would just make that regulator work harder.  If the voltage
> is
> > > well
> > > lower than the specified 5 volts, I would investigate why that is.
>  Could
> > > be your
> > > meter is off ?  The only reason for raising the voltage a TAD would be
> if
> > > you had
> > > a very long run (like over 200 feet) to compensate for I*R losses if
> they
> > > are
> > > significant.  However, such a long run would be counterproductive due
> to
> > > line
> > > loss at the RF frequency of the GPS.
> > >
> > > 73....Bill....WB6BNQ
> > >
> > > W2HX wrote:
> > >
> > > > Length is about 12', type is RG-58, antenna is at my window pointing
> to a
> > > > some blue sky (no splitter). I think from the emails from the folks
> on
> > > the
> > > > list, before anything, I need to find a better location for the
> antenna.
> > > > Thanks for the reply
> > > >
> > > > 73 Eugene W2HX
> > > >
> > > > -----Original Message-----
> > > > From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]
> On
> > > > Behalf Of Scott Mace
> > > > Sent: Sunday, May 15, 2011 10:07 PM
> > > > To: time-nuts at febo.com
> > > > Subject: Re: [time-nuts] basic question on GPS satellites
> > > >
> > > > What type of coax are you using and how long is the run?
> > > >
> > > > I live in the woods and my antenna is partially blocked by
> > > > trees to the north and east and have never had problems.  I have
> about
> > > > 130ft of LMR-400 between my antenna and splitter.
> > > >
> > > >         Scott
> > > >
> > > > On 05/15/2011 05:30 PM, W2HX wrote:
> > > > > Hi there. Recently acquired my first GPSDO. It is a datum 9390
> (thank
> > > you,
> > > > > Norm!).  One aspect of its behavior seems strange to me.  Within a
> > > matter
> > > > of
> > > > > a few minutes, it seems that satellites are appearing and
> disappearing.
> > > > Are
> > > > > the satellites moving that quickly?  I might go from 1SV to 3SV or
> 4SV
> > > and
> > > > > then a minute later go to 1SV or none.  The antenna isn't moving
> and
> > > the
> > > > > trees aren't moving too much today.  I have not done anything with
> > > regard
> > > > to
> > > > > setting minimum elevation or any other parameters.  I did go
> through
> > > the
> > > > > COLD RESTART procedure to clear out everything and let it start
> from
> > > > > scratch.
> > > > >
> > > > >
> > > > >
> > > > > Do other GPSDO users experience something like this?
> > > > >
> > > > > 73 Eugene W2HX
> > > > >
> > > > >
> > > > >
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