Re: [IRCA] Active Whips Mounted Horizontally

[Andrew Ikin <andrew.ikin@xxxxxxxxxxxxx>]

Hello Les,

Mounting an active Whip horizontally shouldn't make much difference as the 
antenna will still respond to vertically polarized signals. If you need 
horizontal polarization you well need a active dipole e.g. a second hand 
Datong AD370. Then there is still an issue that with horizontal 
polarisation; in that where the antenna is close to the ground in terms of 
wavelength the reflected ground wave causes signal cancellation. Also the 
Active Dipole will still be responding to the Electric field which tends to 
be more noisy at low and medium frequencies. Other issues with active Whips 
and dipoles: most offer poor rejection of conducted powerline noise which 
comes from the receiver connexion to the mains power and its Earth. You 
could use a mains filter with a an Earth line choke on the power feed to 
your equipment. The equipment can then be connected to a ground rod and the 
choke will isolated the equipment ground from the powerline Earth.

Have you tried using you ALA1530 in tilted position close the ground to see 
if this helps.

73

Andrew

----- Original Message ----- 
From: "Les Rayburn" <les@xxxxxxxxxxxxxxxx>
To: <am@xxxxxxxxxxx>; <irca@xxxxxxxxxxxxxxxx>
Sent: Sunday, March 02, 2014 7:08 PM
Subject: [IRCA] Active Whips Mounted Horizontally


> Forgive more of my silly questions, but here goes. I continue to try to 
> fight, abate, and reduce local noise here in my suburban neighborhood. 
> Deed restrictions complicate things further, since no visible outside 
> antennas are allowed.
>
> Would mounting the active whips horizontally have any effect on the noise 
> that they're receiving? I notice that noise seems to generally be lower 
> using horizontal antennas than verticals in my situation?
>
>
>
> --
> 73,
>
>
> Les Rayburn, N1LF
> Maylene, AL
> EM63
>
> Member NRC, IRCA, & Medium Wave DX Circle
> Former CPC Chairman for NRC/IRCA
>
> Perseus SDR, SDR-IQ,Funcube Pro, Wellbrooke ALA-1530+ loop, LF Engineering 
> Active Whips,
> Quantum Phaser, Kiwa Loop, Palstar MW Pre-Selector
>
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