[time-nuts] GPS Timing Antenna Failure - Long

Azelio Boriani azelio.boriani at gmail.com
Sun May 13 08:20:42 EDT 2018


Usually GPS antennas are patch antennas. The PROCOM GPS4 (I have 2 of
them) should be a real QFH (I haven't opened it to verify), the
Vaisala radiosonde RS92 has a real QFH. The Sarantel SL series seem is
a double helix not a classic QFH with the two different-size loops.
They name their series GeoHelix.

<https://www.datamatik.no/media/produkt/gps-4.pdf>
<https://www.wmo.int/pages/prog/www/IMOP/meetings/Upper-Air/Systems-Intercomp/Doc3-4(1)Vaisala.pdf>
<http://www.wless.ru/files/Accessaries/Antenna/sl1200%20product%20spec%20v7_1210.pdf>

On Sun, May 13, 2018 at 1:25 PM, Clint Jay <cjaysharp at gmail.com> wrote:
> I'm all for anything that encourages whisky growth
>
> On Sun, 13 May 2018 12:16 pm Dana Whitlow, <k8yumdoober at gmail.com> wrote:
>
>> Flux can provide just the right kind of ionic leakage path that leads to
>> whisky growth
>> and eventual sudden shorts.
>>
>> Dana
>>
>>
>> On Sun, May 13, 2018 at 12:23 AM, Hal Murray <hmurray at megapathdsl.net>
>> wrote:
>>
>> >
>> > lmcdavid at lmceng.com said:
>> > > To make this very long story into a short one, I learned that the  HP/
>> > > Symmetricom 58532A GPS Reference (timing) antennas use a simple patch
>> > > antenna instead of a quadrafilar antenna and that old solder flux
>> > residue
>> > > will attenuate the even amplified GPS signal out of this antenna.
>> >
>> > Flux seems unlikely to produce a sudden failure.
>> >
>> > If flux was the problem, I'd expect it to work poorly when first
>> > installed,
>> > or maybe decay slowly over time as something changed.
>> >
>> >
>> >
>> >
>> > --
>> > These are my opinions.  I hate spam.
>> >
>> >
>> >
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