Topband: EWE Question - YV5MBX

[Javier Remoto]

Hi,

I ask you for help beause I had installed and EWE in my concrete 



Flat Roof Top but without sucess.



The EWE is 10 ft high & 39 ft length with a terminating resistor of 1200 ohms.



I am using an Advanced Receiver Research preamp at the shack, and the antenna works but worst than my shunt feed tower.



I check for interaction between the antennas and none at all.



I have a big noise floor smaller than the received using the tower but with more problems to copy signals.



I have installed a BC filter to avoid spurious emmision from local Broadcast stations.



I thought that the problem could be electrical so I installed a ferrite core between the Pre-Amp power supply and the pre-amp by itself, and the noise floor still there avoiding me to have a good copy of signals.



Testing agains DX Broadcast Stations (without filter) no problem but in 1.8 Mhz I have to use the NB & NR fully clock-wise at the radio to listen signals in the United States at least 3 db less than my vertical. So no benefits for me !!!!



I don´t know if it has some kind of adverse effect   that the antenna coax goes through an external antenna selector (Ameritron RV-8) or maybe that two 4 inches  metal pipes with AC power lines goes below the antenna in a 90 deg angle.



I change my Pre-Amp for another one of the characterisitcs with the same results.



Ideas welcome!!!



73's de Javier