[Fwd: LF: Nags Head Report #7]
Tue, 26 Jan 1999 17:55:56 -0500
tracey gardner wrote:
> Hi All,
> Reference the comments below regarding the use of "normal" loop
> antennas for reception.
> Can I recommend that you take a serious look at Gary Breed's K9AY
> terminated loop antenna which has a cardiod response?
> I'm using one here and regularly acheiving 30db nulls off the
> rear of this antenna all the way down to 16kHz.
> I know that it's not as much as I can achieve from the null on a
> normal loop but the fact that the K9AY produces a cardiod response
> is amazing for such a small antenna.
> If built as per Gary's articles in Sept 97 and May 98 QST you'll
> have a superb antenna for LF reception.
> I've been using the one here in the aero and marine Non Directional
> Beacon (NDB) band 200-500kHz and it is a whole new experience to be
> able to switch the antenna between the four points of the compass.
> I don't think that this antenna could be bettered except by Beverages
> and even then it's not a fair contest when you consider that the
> K9AY only occupies a circle 30ft in diameter!
> 73s Tracey G5VU
> MISCELLANEOUS ISSUES
> 20. It is an interesting happenstance that the azimuth to Worthing UK
> (G3LDO's QTH) is 181 degrees from Carolina Beach at the Oregon Inlet
> site. The result is that if a loop antenna is turned to null the
> Loran-C transmitter at Carolina Beach, its other 180 degree null will
> be pointed almost directly at Worthing. It was not evident that this
> unfortunate occurrence materially affected our results since the
> E-field probes did not pick up even a hint of the G3LDO signals from
> Worthing or any other signals from the UK at the noise level.