> Coupling to "something" is the strongest possibility. It can
> be the radials as well as the radiator of the Inv-L. I would
> recommend a choke at the loop connection.
I would also suspect re-radiation from the inverted L -
particularly since directivity falls apart as the frequency
moves closer to the "resonant" frequency of the inverted L.
The vertical wire on the L should be "floated" in receive to
see if that is a factor.
73,
... Joe, W4TV
> -----Original Message-----
> From: antennaware-bounces@contesting.com
> [mailto:antennaware-bounces@contesting.com] On Behalf Of K9AY
> Sent: Tuesday, October 14, 2008 9:58 AM
> To: RFD; antennaware@contesting.com; topband@contesting.com
> Subject: Re: [Antennaware] New K9AY Observations
>
>
> Comments interspersed...
>
> > I notice that directivity of the loops on the BC band from below
> > 1600khz is dramatic to say the least.
>
> That's a good start. Things are not a total mess!
>
> > On 160M however directivity of the loops is not dramatic at
> all. Many
> > signals are the same strength on all loops..... So I am concluding
> > that the tower and the Inv L are screwing up the loops on 160M.? ...
> > Also I am not yet using a common mode choke on the RG6 feedline of
> > the loops.
>
> > 73 Frank VO1HP
>
> Coupling to "something" is the strongest possibility. It can
> be the radials
> as well as the radiator of the Inv-L. I would recommend a
> choke at the loop
> connection. Be sure the control wires are choked, too. These
> wires may be
> the culprit, or perhaps an accomplice that aids coupling to
> the radials. The
> Array Solutions loop box has instructions for separating the
> antenna and
> feedline grounds -- this may help as well.
>
> 73, Gary
> K9AY
>
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