Yes very nice article and design by Don.
Flags/loops do not exhibit gain but rather directivity. The larger the loop the
greater the capture area and the less of a need for a preamp. I routinely use
my full size flag without any preamp external to the rig.
A correctly designed and built full size flag will exhibit front/back of 25-30
db.
If smaller loops (and I've tried many) have "essentially the same RDF as other
larger flag or pennant antennas" I could have saved myself a lot of work by
never having put up a full size flag. Size matters.
For the purpose of direction finding of relatively close noise sources, Don's
implementation looks excellent.
73 - Steve WB6RSE
> On Feb 23, 2021, at 10:25 AM, John Kaufmann via Topband
> <topband@contesting.com> wrote:
>
> This antenna could also be used as directional receiving antenna on its own.
> Although it is not hugely directive, it can be rotated easily to peak or
> null signals or noise, and it is better than a conventional unterminated
> loop. It has essentially the same RDF as other larger flag or pennant
> antennas but is obviously far more compact.
>
>
>
> This is a nice contribution by WD8DSB. Now I have to go off with the
> mini-flag and chase some local noise sources that have been plaguing me this
> winter on the low bands.
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