Topband: Feedpoint of short RX vertical

[donovanf at starpower.net]

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 at contesting.com> 
To: topband at 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 <topband at contesting.com> 
An: topband <topband at contesting.com> 
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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