Re: Topband: Feedpoint of short RX vertical

[luc kerkhofs via Topband <topband@contesting.com>]

Tom,
 
one of 2 elements is very close to the house ( 20 ft ) and coax is lying ON the 
ground, so I guess it is best to use a braid breaker ?
 
In fact it is a test setup . I also have a receiver 500 meters inline with the 
antenna direction so I can 
check the F/B of my test setup
 
Luc
 
  


On , luc kerkhofs <luckerkhofs@yahoo.com> wrote:
  


Hello Frank,
 
no it is 11 m high vertical without toploading feedpoint is matched with 
resistor and coil
 
Luc 


On Saturday, June 7, 2014 10:09 PM, "donovanf@starpower.net" 
<donovanf@starpower.net> wrote:
  


Hi Frank, 

My 8-circle array uses low impedance verticals, not high impedance 
verticals like the Hi-Z. My verticals use an inductor and resistor at the 
base of each vertical. In a Hi-Z array each vertical connects directly to 
the input of a high input impedance amplifier. 

The purpose of the radials in an array of short low impedance verticals 
is to provide a reasonably stable feed point impedance. Eight 23 meter 
radials provide adequately stable feed point impedance at my QTH. 

Radials are not needed at all in a Hi-Z array. 

73 
Frank 
W3LPL 


----- Original Message -----

From: "dl8yhrfrank--- via Topband" <topband@contesting.com> 
To: topband@contesting.com 
Sent: Saturday, June 7, 2014 8:23:12 PM 
Subject: Re: Topband: Feedpoint of short RX vertical 

hi luc 
so you use a hi z rx arrya and you have matched the 7m long radials with a coil 
in resonaze? 
VY 73 
frank 






-----Ursprüngliche Mitteilung----- 
Von: luc kerkhofs via Topband &lt;topband@contesting.com&gt; 
An: topband &lt;topband@contesting.com&gt; 
Verschickt: Sa, 7 Jun 2014 9:13 pm 
Betreff: Topband: Feedpoint of short RX vertical 




Hello, 

trying to improve my RX setup, I have a question . 

When feeding short RX verticals with a coil and resistor in series, does it 
make 
sense to decouple the feedline 
at the feedpoint with a braid breaker ? 

73 
Luc 
ON4IA 
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