[RFI] TVI: suggestins needed! Help me

[Pete Smith]

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 MHz; 
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 has 
the problem, or are there many?  Anyhow, I think this is worth a try before 
you go further with exploring why the low-pass doesn't appear to help.


73, Pete N4ZR
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