[time-nuts] Choke Ring Antenna - Patch Placement?

Bob Camp lists at rtty.us
Thu Oct 10 21:41:12 UTC 2013


Hi

You are looking for total rejection of any signal below the horizon, and near total rejection of any signal within 10 degrees of the horizon. Obviously total and near total could have db numbers associated with them, but the numbers you get are what ever you get….

Bob

On Oct 10, 2013, at 2:15 PM, Bob Stewart <bob at evoria.net> wrote:

> I bought a set of Wilton "tuned" pie pans yesterday to experiment with a choke ring antenna.  The "kit" consists of 4 pans of diameters 12", 10", 8", and 6".  The height of the sides is more or less 51mm.  I've been experimenting with placement of the patch in the pit, but I don't know what I'm looking for, so a little help would be appreciated.  Am I looking for best overall signal level from horizon to azimuth, or something else?  I'm not sure I would know how to measure multi-path levels.  There seems to be a definite difference depending on whether the patch is at the bottom, somewhere in the middle, level with the rim of the pans, or even perched on a DVD disk which is level with the rim.  I don't have any sort of metal container to use as a support for the patch at this point.
> 
> Bob - AE6RV
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