[TenTec] Eagle Tuner

[Bob McGraw - K4TAX]

In working the same station some 300 miles away on a regular basis, I find 
his signal to be about the same on the two antennas but the noise is less on 
the folded dipole.  Both the dipole and folded dipole are in an inverted V 
configuration with the apex at about 45 ft  They are mounted on a 6' cross 
arm on the tower, one on the left and one on the right.  Of course there is 
some directivity due to the angle / broadside of the two antennas being 
different by about 60 degrees.

I'd though about doing a field strength measurement over 360 degrees at a 
distance of about 3 miles.  The local terrain and site access in the area 
makes that  imposable.  I could plot about 4 or 5 locations but I wouldn't 
consider that few adequate.  Otherwise, I've stomped through fields and 
woods carrying a GR field strength meter making BC field strength 
measurements but that was many years ago.


73
Bob, K4TAX



----- Original Message ----- 
From: "Carter" <k8vt at ameritech.net>
To: <tentec at contesting.com>
Sent: Tuesday, September 09, 2014 3:51 PM
Subject: Re: [TenTec] Eagle Tuner


> On 9/9/2014 10:47 AM, Bob McGraw - K4TAX wrote:
>
> > One thing I've clearly noticed about folded dipoles, the one I have
> > on the tower is noticeable quieter, 1 to 2 S units, than the 75M
> > dipole fed with coax on the same tower at approximately the same
> > height.  Now there may be some lobes that favor noise source,
> > typically NW as that's where the storms originate, or slightly null
> > to the noise source as the antenna are about 60 degrees apart,
> > broadside.
>
> Sorry Bob, but in all sincerity, I gotta ask...
>
> If the *noise* is "noticeable[y] quieter, 1 to 2 S units", wouldn't the 
> wanted *signal* also be down 1 to 2 S units? Your theory about lobes and 
> noise has merit, but presumably the signal and noise would be affected 
> equally. (or could it be that the wanted signal is horizontally polarized 
> and noise is supposedly mostly vertically polarized?)
>
> Inquiring minds want to know.
>
> 73,
> Carter   K8VT
>
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