So what does your car radio say to you set to a quiet spot at the top of the
AM band?
Have you eliminated your own property by killing all power and run the K3 on
a battery?
Carl
KM1H
----- Original Message -----
From: "Gary Smith" <Gary@ka1j.com>
To: <Topband@contesting.com>
Sent: Thursday, November 29, 2012 1:03 PM
Subject: Re: Topband: High noise with Rx antennae
yes it is, although the quietest directions are to the N, NE & NW
which would make those directions the worst if it were the rail
lines.
I'm finding that the Rx triangle has more noise than the 160 Inv-V
and that doesn't make sense to me yet. I don't use a pre on the low
bands & sometimes use an attenuator.
Gary
KA1J
Is that rail line electrified?
Carl
KM1H
----- Original Message -----
From: "Gary Smith" <Gary@ka1j.com>
To: <topband@contesting.com>
Sent: Thursday, November 29, 2012 11:52 AM
Subject: Topband: High noise with Rx antennae
> I'm hearing a lot of noise with my triangle array. I was hearing it
> close to the house so I relocated 100' away albeit 10-15 feet lower.
> Unfortunately I can not put it in a clearing and there are trees
> around it, I cut down several that were within 10' of the elements.
> I am using flooded coax and the snap on terminals. I replaced all
> the terminals but this did not change the problem.
>
> I am getting directivity and to the south along the road I hear an
> increased background noise where home electronics may be a source of
> noise. What I hear sounds like electrical noise, nothing digital
> sounding but moving the antenna didn't help much. By necessity, the
> transmit antenna is 75' away and some of the 130' radials on the
> ground run fairly close to the Rx array. I find the inv-l to be
> sometimes less noisy but the triangle will often pick up a signal
> the vertical does not (albeit with greater background noise).
>
> I'm using a K3 with sub Rx and the AF control is rarely turned more
> than 15 degrees. Playing with Rf levels, AGC, noise blanker, noise
> reduction seems to help overall and Sometimes I run with no AGC at
> times too but it doesn't deal with the high background noise. I'm
> wondering if shortening the elements would have a positive effect on
> reducing the noise level?
>
> Here is a view of the QTH. My house is the last one, at the end of
> the road & next to the rail line. I am sandwiched between two state
> parks. Other than Amtrak being beside the house and the people on
> the road south of me, there is no other house or signal generation
> within a mile. http://tinyurl.com/cy7zv7h
>
> Thanks for any suggestions.
>
> Gary
> KA1J
> _______________________________________________
> Topband reflector - topband@contesting.com
>
>
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Topband reflector - topband@contesting.com
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