Bob:
Another way of saying this is your model needs another wire between the
shack end of your LW and ground. Then you put a source in this wire. Make the
vertical wire 6.1M long and put the source at the 10% point from ground in that
wire. The impedance that the model shows for this feedpoint is the impedance
your tuner must match.
But Jim is correct - you need a connection to ground/earth for the model
to work.
73 de
Gene Smar AD3F
-------------- Original message --------------
From: Jim Lux <jimlux@earthlink.net>
> At 10:05 PM 12/10/2005, AD5VJ Bob wrote:
> >I am trying to do an approximation.
> >
> >I am using NEC and am trying to look at my end feed wire
> >but can not find an end feed wire in the models.
> >
> >Does anyone know which model I can use that would be best
> >suited for an end feed horizontal wire with no feed line.
> >
> >It is not a dipole.
> >
> >It is just a horizontal wire (109.7 meters long up at 6.1
> >meters) that comes straight to my tuner which has
> >capability of tuning a single random wire antenna.
>
> SO where's the ground wire from your tuner connected? to the earth? Put
> wires in your model to represent the wire from the tuner to ground (it will
> need to "touch" the ground in your model, i.e. z=0). Put the feedpoint
> where the tuner is.
>
>
>
>
>
> > 73 fer nw,
> >Bob AD5VJ
> >
> >10X# 37210, FP#-1141, SMIRK#-5177
> >http://www.n5iet.com/
> >Code may be taking a back seat for now,
> >but the pioneering spirit that put the code
> >there in the first place is out front of it all.
> >
> >
> >
> >
> >_______________________________________________
> >
> >See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> >Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
> >any questions and ask for Sherman, W2FLA.
> >
> >_______________________________________________
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> >TowerTalk@contesting.com
> >http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather
> Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
> and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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