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 <cjaysh...@gmail.com> wrote: > I'm all for anything that encourages whisky growth > > On Sun, 13 May 2018 12:16 pm Dana Whitlow, <k8yumdoo...@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 <hmur...@megapathdsl.net> >> wrote: >> >> > >> > lmcda...@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. >> > >> > >> > >> > _______________________________________________ >> > time-nuts mailing list -- time-nuts@febo.com >> > To unsubscribe, go to https://www.febo.com/cgi-bin/ >> > mailman/listinfo/time-nuts >> > and follow the instructions there. >> > >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.