[RFI] TVI: suggestins needed! Help me

Ed McGrath wd5iok at comcast.net
Sun Nov 23 12:38:49 EST 2003

Lower your power & see if it goes away. It is probably front end overload.
The antennas are too close together.
----- Original Message ----- 
From: "Pete Smith" <n4zr at contesting.com>
To: "Bob Tellefsen" <n6wg at earthlink.net>; "Aldo Angeletti"
<ik2ani at infinito.it>; <rfi at contesting.com>
Sent: Sunday, November 23, 2003 12:27 PM
Subject: RE: [RFI] TVI: suggestins needed! Help me

> At 09:23 AM 11/23/03 -0800, Bob Tellefsen wrote:
> >Aldo
> >One thing to check.
> >How rf-tight is the transmitter case?
> >Run a piece of transmission line from your TV set to the transmitter.
> >Move the loose end of the transmission line around the transmitter to
> >see where rf energy leaks out.  Once rf is on the outside of your coax
> >feedline, no low pass filter can do much for you.
> While the harmonic is there, it may not necessarily be the cause of the
> TVI.  some television sets in this country used to have their IF at 21
> others are subject to fundamental overload interference.  Try a high-pass
> filter on the input of the television (I assume it is only one set that
> the problem, or are there many?  Anyhow, I think this is worth a try
> you go further with exploring why the low-pass doesn't appear to help.
> 73, Pete N4ZR
> The World HF Contest Station Database was updated October 29.
> 2469 stations are listed -- 29 new and over 100 updated.
> Are you current? www.pvrc.org/wcsd/wcsdsearch.htm
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