[time-nuts] time-nuts Digest, Vol 96, Issue 70

Tue Jul 17 16:00:31 UTC 2012

Yes, I agree, it is not an antenna gain problem... it is better to find a
way to draw the constellation like LH for the TBolt. This way you can find
out if the antenna is free or not from obstructions.

On Tue, Jul 17, 2012 at 5:25 PM, Bob Camp <lists at rtty.us> wrote:

> Hi
>
> The antenna gain is likely *plenty* for that short a run of coax.
>
> Bob
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Chris Hoffman, KG6O
> Sent: Tuesday, July 17, 2012 11:16 AM
> To: time-nuts at febo.com
> 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, time-nuts-request at febo.com wrote:
>
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> >
> >
> > 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 <actast at hotmail.com>
> > To: Time-Nuts <time-nuts at febo.com>
> > Subject: Re: [time-nuts] XL-DC Antenna Requirements
> > Message-ID: <BAY162-W4046E629AF83F1D3BDED81DFDB0 at phx.gbl>
> > 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: azelio.boriani at screen.it
> >> To: time-nuts at febo.com
> >> 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 <cq.kg6o at gmail.com>
> 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
> >>> cq.kg6o at gmail.com
> >>> http://ar.ctur.us
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>> -CH
> >>>
> >>> Chris Hoffman
> >>> cq.kg6o at gmail.com
> >>> http://ar.ctur.us
> >>>
> >>>
> >>>
> >>>
> >>> _______________________________________________
> >>> time-nuts mailing list -- time-nuts at febo.com
> >>> To unsubscribe, go to
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> >>> and follow the instructions there.
> >>>
> >> _______________________________________________
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> >
> >
> > ------------------------------
> >
> > Message: 2
> > Date: Mon, 16 Jul 2012 18:02:49 -0700
> > From: Bob Martin <k6rtm at comcast.net>
> > To: time-nuts at febo.com
> > Subject: Re: [time-nuts] XL-DC Antenna Requirements
> > Message-ID: <8DBEF16D-CE19-4088-9347-458C02A53360 at comcast.net>
> > 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 k6rtm at arrl.net
> >
> >
> > On Jul 16, 2012, at 16:01, time-nuts-request at febo.com wrote:
> >
> >> Message: 1
> >> Date: Mon, 16 Jul 2012 14:59:52 -0700
> >> From: Chris Hoffman <cq.kg6o at gmail.com>
> >> To: time-nuts at febo.com
> >> Subject: [time-nuts] XL-DC Antenna Requirements
> >> Message-ID: <0208B173-9F7B-49B9-AE83-EE231EBBA18E at gmail.com>
> >> 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
> >> cq.kg6o at gmail.com
> >> http://ar.ctur.us
> >
> >
> >
> > ------------------------------
> >
> > _______________________________________________
> > time-nuts mailing list
> > time-nuts at febo.com
> > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> >
> > End of time-nuts Digest, Vol 96, Issue 70
> > *****************************************
>
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