Topband: K9AY Loop not performing

Michael Walker va3mw at
Mon Dec 9 22:03:30 EST 2019

Hi Pete

That is one interesting find.  I'm going to have to do some tests and see
if I have the same issue.

My RX antenna and TX antennas are about 2 wavelengths apart and both are
very well choked into a 2x8 switch.

I am going to have to give this some thought.

73, Mike va3mw

On Mon, Dec 9, 2019 at 4:26 PM N4ZR <n4zr at> wrote:

> Thank you to everyone who responded to my query.  The transmitting
> antenna was indeed coupling both noise and signals into my K9AY loops.
> I disconnected it at the feedpoint and the noise level on the RX antenna
> dropped 4 S-units!  Fooling around today in steady rain (which may
> affect the quality of ground, I'd expect).  I  was amazed, playing with
> the high end of the AM broadcast band, to be able to select one of two
> stations on the same frequency, just by switching the direction of the
> loop array.  I can hardly wait for European sunrise.
> 73, Pete N4ZR
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> at <>, now
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