[TowerTalk] End Fed Wire

[AD5VJ Bob]

Does a beverage have to be in a straight line or can it
have 90's in it. this wire has one 90 and a couple of
turns less than 90
 
It has no termination at the end and I have restructured
it so I am now feeding it with the center conductor of
rg-75 shield not connected just free.
 
It then goes to the tuner and the tuner goes to a ground
rod.
 
Listening this morning and it seems to tune ok from
180mtrs thru 6.
 
The wire is approximately .7 wavelength at 1832.00 from
end to end.
 
It is all now pretty much at 20' above ground horizontal
hanging from metal supports.



  73 fer nw,
Bob AD5VJ

10X# 37210, FP#-1141, SMIRK#-5177
 <http://www.n5iet.com/> 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.




-----Original Message-----
From: ersmar at comcast.net [mailto:ersmar at comcast.net] 
Sent: Sunday, December 11, 2005 11:48 AM
To: Jim Lux; AD5VJ Bob; towertalk at contesting.com
Subject: Re: [TowerTalk] End Fed Wire


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 at 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. 
> > 
> >_______________________________________________ 
> >TowerTalk mailing list 
> >TowerTalk at contesting.com 
> >http://lists.contesting.com/mail! man/list
info/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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