[NLRS] 1296 omnis

Thu, 2 Jan 2003 20:12:15 -0600

I think the collective experience was that an omni on 1296 is an adequate
antenna for working out perhaps 20 miles or so (+/-), but that even a very
short boom antenna, something considerably shorter than a 20' boom, will
provide for more contacts.   For example, Directive Systems has a nice end
mount loop yagi on a 3' boom (that's 36") that has 15 dBi of gain.   Several
NLRSers have built VJB J-Pole fed yagis with good gain (ex: my 902 yard
stick yagi).

Hope to work ya on 1296 whatever you use.

73, Jon
W0ZQ

----- Original Message -----
From: "Clare Jarvis" <[email protected]>
To: <[email protected]>
Sent: Thursday, January 02, 2003 5:18 PM
Subject: Re: [NLRS] 1296 omnis

> Hi Gang,
>
> The question was really specific.  It didn't ask your opinion of omnis.
Sometime
> the op doesn't have any choice because of constraints.  I know Matt's
> situation.  This is a fellow that regularly wins the category he enters.
> He knows the value of gain antennas but when you can't fit
> a 20 foot boom in the space you have then what good is it.
>
> Clare   K0NY
>
>
> On Thursday 02 January 2003 11:50 am, you wrote:
> > Hi John,
> > You're correct, and the references are good ones !
> >
> > However, I don't think it matters WHAT omni-antenna you use if no one
can
> > hear you!  On 2m, you make up for lack of antenna with power, but that's
> > real hard (and expensive !) to do on 1296.  Even a WA5VJB home-built (10
el
> > on a 30" boom) will produce 12 or so dBi gain.  That takes your 10 watt
IC
> > brick to 100-160 w ERIP.  The biggest advantage on antenna gain, though,
is
> > that it ALSO works on receive.
> >
> > You CANNOT work as much on an omni- as you can with even a small gain
> > antenna!  This doeasn't seem to be a popular answer, but its the simple
> > truth.
> >
> > 73 Donn
> > WA2VOI/0
> >
> > At 09:36 02-01-03 -0600, John Kalenowsky, K9JK wrote:
> > >While the discussion has evolved to pleas for use of directive (read
> > > 'GAIN') antennas by rovers, I've only seen a few answers to the
original
> > > question, regarding omni antennas for 1296.
> > >
> > >I remember the Double Diamond/Iowa Bug Slicer antennas from NA0IA's
> > >presentation on "The Art of the Rover" at the 2002 CSVHFS Conference.
I
> > >haven't used them myself and I am not aware of anyone selling them
> > >commerically but they look fairly easy to build.  There is a pdf with
> > >dimension information at the Cedar Rapids Microwave Society's Web site
> > >http://www.rf.org/crms/projects/DoubleDiamondAntenna.pdf and pictures
at
> > >http://www.rf.org/farmers/n0cih/ (look especially at pics 4 and 5 to
see
> > > the slotted screw method for connecting the element to the connector
> > > flange).
> > >
> > >>From the Antenna Range results at 2002 CSVHFS: 5.1 & 6.3 dBi Gain at
902
> > >> and
> > >
> > >8.3 & 8.5 dBi Gain at 1296.  K0DAS had them for both bands, N0CIH had
one
> > >for 902 and NA0IA had one for 1296.
> > >
> > >73, JK (K9, that is)
> > >
> > >----- Original Message -----
> >
> > From: <[email protected]>
> >
> > >To: <[email protected]>
> > >Sent: Tuesday, December 31, 2002 16:50
> > >Subject: [NLRS] 1296 omnis
> > >
> > >> Thinking about the possibility of portable operation some time
> > >> (perhaps in January) with omni antennas.  Anyone have luck with 1296
> > >> halos or similar?  I have omni's for 50,144,222,432 but nothing
> > >> beyond that.  Who is selling omni's for 1296 (or 902) these days?
> > >> Any thoughts helpful -
> > >> 73, and good DX for '03
> > >> Matt
> > >> KF0Q
> > >> EN44ea
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