Dave,
Given your ground conditions, I'd suggest looking into
the pennant or flag antennas. The flag was developed
by K6SE as ground independent receiving antenna to
avoid the ground dependence problems exhibited by the
K9AY, EWE and similar antennas.
73,
... Joe, W4TV
> -----Original Message-----
> From: topband-bounces@contesting.com
> [mailto:topband-bounces@contesting.com] On Behalf Of Dave Court
> Sent: Tuesday, August 11, 2009 3:28 AM
> To: wa5pok@peoplepc.com
> Cc: topband@contesting.com
> Subject: Re: Topband: K9AY phased array
>
>
> Hi
> I have been using a home brew K9AY loop on 160m for some time
> and have
> had similar (but not as bad) results as described by Dave
> G4GED. However
> Mike WA5POKs comments have also got me wondering.
>
> I have been wondering what to do for an RX antenna in Bahrain (A9).
> Although I think I can erect a reasonable TX antenna, the
> plot size of
> my QTH is not excessive. It is also extremely dry, so I was
> interested
> in Mike's comments about watering. Not a good idea when water is more
> expensive than gasoline!
>
> My choice seems to be a K9AY which may not work too well because of
> proximity to the TX antenna and lack of a good ground or
> running out an
> un-terminated beverage type wire in a NW/SE configuration on
> the surface
> of the dessert common land nearby. This might however have to
> run across
> TX antenna radials.
>
> Any views?
>
> 73s Dave
>
>
> >>> Was wondering to try a Wellbrook K9AY phased array.
> >>> Is there someone that have seen this or have already installed it.
> > no
> >> directional properties and was pretty deaf. It wasn't
> faulty, worked
> >> OK on MW BC stations but not on TB. Could have been due to
> the fact
> >> that it was sited only about 15 metres from my Inv L?
> Tried detuning
> >> the Vertical on receive cycles but it didn't help.
> >>
> >
> > I use the K9AY loop and one side of the loop is only 2 meters from
> > one elevated radial.
> > 1. My inverted L is grounded during receive for noise reduction
> > (used info from ON4UN's book) and
> > 2. When it becomes deaf or looses directivity, I have lost
> my ground
> > due to excessive dry WX.
> >
> > Lots of watering of the ground and cleaning the ground rod restores
> > the operation of my AY loop.
> >
>
> --
> This Email comes from Dave Court - EI3IO, G3SDL, OZ3SDL
> QTH (Grid) Locator - IO63WF
> Web Site: http://EI3IO.com
> EI7SDX:SHANDX DX packet cluster web site: http://shandx.ath.cx
> Cluster Access telnet://shandx.ath.cx:5000
> Node Access telnet://shandx.ath.cx:7400
> QSL address: 'Connogue', River Lane, Shankill, Co. Dublin, Ireland
>
> Tel: (EI) +353 48 9099 6474 or (GI) +44 28 9099 6474
> Skype Username: Connogue or Connport
> VoIP: sip: 1996474@sipgate.co.uk
>
>
> _______________________________________________
> Topband mailing list
> Topband@contesting.com
> http://lists.contesting.com/mailman/listinfo/topband
_______________________________________________
Topband mailing list
Topband@contesting.com
http://lists.contesting.com/mailman/listinfo/topband
|