Hi The antenna gain is likely *plenty* for that short a run of coax.
Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Chris Hoffman, KG6O Sent: Tuesday, July 17, 2012 11:16 AM To: [email protected] Subject: Re: [time-nuts] time-nuts Digest, Vol 96, Issue 70 Wow! Great info. The 5v mag mount antennae are working, but the receivers are cycling between 2-D and 3-D (5 or 6-bird) modes. With the 26dB trimbles, I suspect I'm loosing ~5db in the 30ft of crumby RG-5, and a little pattern with my rain-gutter backplane. I don't have too much arial obstruction, but that's no excuse from overkill: I'll be on the lookout for 26- or 40[?!?]-dB cones. Does anyone have a Lucent part number available? -CH On Jul 17, 2012, at 5:00, [email protected] wrote: > Send time-nuts mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of time-nuts digest..." > > > Today's Topics: > > 1. Re: XL-DC Antenna Requirements (Tom Knox) > 2. Re: XL-DC Antenna Requirements (Bob Martin) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 16 Jul 2012 18:11:59 -0600 > From: Tom Knox <[email protected]> > To: Time-Nuts <[email protected]> > Subject: Re: [time-nuts] XL-DC Antenna Requirements > Message-ID: <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > > Hi Chris; > There were a number of XL-DC produced with 12vdc antenna power and should be marked near the connector. There are also some marked "Down converter required". Other then then those the 58532A is a great choice andf sold under a number of names such as VIC-100, the Lucent antennas are also nice. The lucent are available in three gains 20, 26, 40 dB version. Most are the 26dB version and are a great product. Placement can be important, and although you could use indoors it will perform best as low as possible with a full view of the sky. (Low to avoid terrestrial interference). > > Thomas Knox > > > >> Date: Tue, 17 Jul 2012 00:50:02 +0200 >> From: [email protected] >> To: [email protected] >> Subject: Re: [time-nuts] XL-DC Antenna Requirements >> >> The XL-DC is a 6 channels receiver, so no other benefit other than a >> greater probability to see constantly 6 satellites is gained from 24 to 32 >> satellites constellation. >> >> On Mon, Jul 16, 2012 at 11:59 PM, Chris Hoffman <[email protected]> wrote: >> >>> All, >>> >>> Though somewhat outmoded, looking forward to starting my own time shop >>> with two XL-DC controllers that I have been lucky enough to pick up >>> recently. >>> >>> My question: Do I really need to invest in the likes of the HP 58532A >>> antennae, or will my surplus Trimble magnetic antennae -- magnetically >>> attached to a random ferrous backplane -- do? >>> >>> I guess what I am really asking: what are the relevant antenna design >>> requirements here, and does the advent of as 32-satellite-constellation >>> have any effect upon the antenna choice (i.e. design downgrade) for the >>> TrueTime XL-DC? >>> >>> -CH >>> >>> Chris Hoffman >>> [email protected] >>> http://ar.ctur.us >>> >>> >>> >>> >>> >>> >>> -CH >>> >>> Chris Hoffman >>> [email protected] >>> http://ar.ctur.us >>> >>> >>> >>> >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > > ------------------------------ > > Message: 2 > Date: Mon, 16 Jul 2012 18:02:49 -0700 > From: Bob Martin <[email protected]> > To: [email protected] > Subject: Re: [time-nuts] XL-DC Antenna Requirements > Message-ID: <[email protected]> > Content-Type: text/plain; charset=us-ascii > > Chris-- > > The 58532A is somewhat higher gain (30dBi or better) than most mag-mount antennas (26dBi typ IIRC). The pointy nature of the 58532A also serves as an avian deterrent, reducing the accumulation of attenuating deposits... > > Running two receivers, I would highly recommend a real GPS distribution amp such as the 58535A. Such a beast will let you run both receivers from one antenna, while providing isolation between the receivers. I just happen to have one handy, having recently pulled it out of service and replaced it with a 4-port model to better support my time-nuttiness. Contact me off list if you would be interested. > > 73 Bob [email protected] > > > On Jul 16, 2012, at 16:01, [email protected] wrote: > >> Message: 1 >> Date: Mon, 16 Jul 2012 14:59:52 -0700 >> From: Chris Hoffman <[email protected]> >> To: [email protected] >> Subject: [time-nuts] XL-DC Antenna Requirements >> Message-ID: <[email protected]> >> Content-Type: text/plain; charset=us-ascii >> >> All, >> >> Though somewhat outmoded, looking forward to starting my own time shop with two XL-DC controllers that I have been lucky enough to pick up recently. >> >> My question: Do I really need to invest in the likes of the HP 58532A antennae, or will my surplus Trimble magnetic antennae -- magnetically attached to a random ferrous backplane -- do? >> >> I guess what I am really asking: what are the relevant antenna design requirements here, and does the advent of as 32-satellite-constellation have any effect upon the antenna choice (i.e. design downgrade) for the TrueTime XL-DC? >> >> -CH >> >> Chris Hoffman >> [email protected] >> http://ar.ctur.us > > > > ------------------------------ > > _______________________________________________ > time-nuts mailing list > [email protected] > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > End of time-nuts Digest, Vol 96, Issue 70 > ***************************************** _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
