Could also be 3rd harmonic into TV Channel 3, if that's what TV is tuned to.
If there's mixing diode in dish, harmonic could be generated there. But all
this seems unlikely with a non-radiating load. Perhaps it is AC line
coupling. Good luck.
BC Jay Jackson, Jr. W4VG
>>> "Charles T Johnston" <charles@ab7sl.com> 14-Feb-00 6:27:56 PM >>>
Since the TVI is only on 15M and without knowing the year and model of TV
set affected I would comment that older TV sets have a 21Mhz IF strip.
This may be why all other bands are TVI free,
Charles T Johnston - AB7SL
charles@ab7sl.com
AB7SL- Ham Radio Pages
http://www.ab7sl.com
----- Original Message -----
From: <dj2001@isd.net>
To: <rfi@contesting.com>
Sent: Monday, February 14, 2000 4:05 PM
Subject: [RFI] RFI on TV while using dummy load
>
> I wonder if anyone has a idea on this one.
>
> TVI into the vidio of a TV set which is hooked up to a dish (EchoStar
> dbs system) transmitter on 15 meter band while transmitting into a
> dummy load, the worst seems to center on 21.158, and gets better as I
> move up the band. RF output 200 watts. All other bands ok on the
> dummy load.
> Moving the ac line cable to the radio makes the tvi worse and better
> depending on position. Taking the top cover off the radio makes the
> tvi get better
> Everything else is normal, no malfunctioning of the radio as far as I
can tell.
>
> Strange but true.
>
> Will a line filter do the job?
>
> Anyone have any recomendations for line filters.
>
>
> Dale j.
>
>
>
>
>
> --
> FAQ on WWW: http://www.contesting.com/rfi-faq.html
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>
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