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Re: Topband: 1940 kHz Intruder

To: topband@contesting.com
Subject: Re: Topband: 1940 kHz Intruder
From: "Joe Subich, W4TV" <lists@subich.com>
Date: Thu, 5 Jan 2023 12:20:56 -0500
List-post: <mailto:topband@contesting.com>
On 2023-01-05 11:26 AM, A J wrote:

> It sounds like two station are there possibly more.

Intermodulaton (mixing) ...

> I heard a frequency 1610khz  said.

You have two frequencies, solve for the third.
    1940 = 2 * x - 1610 = 1775 (out of band)
or  1940 = 2 * 1610 - x = 1280

I would start looking at the allocations for a community
where you have a 1610 and 280 close together (preferably
co-located).

73,

   ... Joe, W4TV

On 2023-01-05 11:26 AM, A J wrote:
Hi All

It sounds like two station are there possibly more.

I heard a frequency 1610khz  said.

No directional antenna to the south east. Just North and NE nothing heard on those. It is heard on the inverted V at varying levels.

The info draws a picture. See link below.

https://www.contesting.com/data/profile/ve3hj/photo.jpeg


AJ___ VE3HJ



On 1/5/23 00:09, Frank W3LPL wrote:
Hi Jim,

No one has yet reported a strong enough signal to be sure if its a mixing
product or a harmonic.  Because everyone -- so far -- is reporting a weak
signal I suspect its a mixing product.  Two reporters said that the audio
is badly distorted and appears to carrying two programs.

The signal it too weak here for me to analyze.

It appears to radiate from the vicinity on northern NJ, NY City or
southern NY

Perhaps a Topbander is that vicinity will report a stronger signal

73
Frank
W3LPL

----- Original Message -----
From: "K9YC" <jim@audiosystemsgroup.com>
To: "topband" <topband@contesting.com>
Sent: Thursday, January 5, 2023 4:48:50 AM
Subject: Re: Topband: 1940 kHz Intruder

I'm much too far away to hear anything, but the obvious question is, "is
it a harmonic or a mix?"  So is anyone hearing it loud enough to tell if
there are two programs or only one?

73, Jim K9YC

On 1/4/2023 7:04 PM, samjos@epix.net wrote:
>From NE PA FN11VF bearing is roughly NNE. Too distorted to make out.

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Knowledge is Power and Power is Knowledge.___AJ___1967
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