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 <luckerkh...@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, "donov...@starpower.net" <donov...@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 <topband@contesting.com> An: topband <topband@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 _________________ Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband