[time-nuts] Rooftop antenna and splitter

[Denny Page]

Hi Dana,

The antennas were in the window, top of the lower pane of a two pane window. Certainly a better location that the antenna sitting on the desk.

There were several other units that showed similar behaviors. I suppose it’s possible that there was interference. There were 7 antennas in 3 different groups—2 groups of 3 antennas separated by 4 inches, and 1 antenna off by itself. However, all showed an increased “closeness” in tracking when moving to the common antenna. It’s not exactly a controlled test, but surprising nonetheless. Just out of curiosity, I may do a more controlled comparison once I’m done with the current testing.

Denny


> On Apr 29, 2019, at 18:18, Dana Whitlow <k8yumdoober at gmail.com> wrote:
> 
> Denny,
> 
> That is certainly a large difference.  But I'm not clear on one point that
> could
> easily be very important:
> 
> Were the two antennas for the separate antenna test indoors, or on the roof?
> If indoor, I kind of suspect that the difference might mostly be attributed
> to the
> change in antenna locations more than anything else.  If this is what's
> going on,
> you've made very strong case for outdoor antennas for GPS timing.
> 
> Also, it's possible that the two receivers with their antennas in such close
> proximity might have been interfering with each other.
> 
> Dana
> 
> 
> On Mon, Apr 29, 2019 at 8:07 PM Denny Page via time-nuts <
> time-nuts at lists.febo.com> wrote:
> 
>> I don’t seem to be able to attach the pics to the emails correctly to
>> allow the mailing list software to process them. Rather than bombard
>> everyone with any more attempts, I put them up on Dropbox.
>> 
>> You can find the pics here:
>> https://www.dropbox.com/sh/fbbfuydqac5qqql/AAADkwrcVL8u5nkHvi8ecMe3a
>> 
>> Thank you to Tom and John for trying to help!
>> 
>> Denny
>> 
>> 
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